Relevant bibliographies by topics / Constitutive Model

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Constitutive Model'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 June 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Constitutive Model.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Constitutive Model"

1

Desai, Chandrakant S., and Mohammad R. Salami. "Constitutive Model for Rocks." Journal of Geotechnical Engineering 113, no. 5 (May 1987): 407–23. http://dx.doi.org/10.1061/(asce)0733-9410(1987)113:5(407).

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Khoo, H. A., and T. M. Hrudey. "Constitutive Model for Ice." Journal of Engineering Mechanics 118, no. 2 (February 1992): 259–79. http://dx.doi.org/10.1061/(asce)0733-9399(1992)118:2(259).

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Rus, Guillermo, Juan Melchor, Marie Muller, and Akhtar A. Khan. "Biomechanical Constitutive Model Identification." Mathematical Problems in Engineering 2019 (July 14, 2019): 1–2. http://dx.doi.org/10.1155/2019/3607015.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Yang, Wei Wu, Hai Feng Liu, and Jian Guo Ning. "Dynamic Constitutive Model of Concrete." Advanced Materials Research 450-451 (January 2012): 379–82. http://dx.doi.org/10.4028/scientific5/amr.450-451.379.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Yang, Wei Wu, Hai Feng Liu, and Jian Guo Ning. "Dynamic Constitutive Model of Concrete." Advanced Materials Research 450-451 (January 2012): 379–82. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.379.

Full text
Abstract:
Based on the damage and Ottosen failure criterion, a dynamic constitutive model is proposed to investigate the mechanical behavior of concrete subjected to impact loading. The model predictions fit well with experimental results. So it can be used to simulate dynamic mechanical behavior of concrete
APA, Harvard, Vancouver, ISO, and other styles
6

Ma, Wen Xu, and Ying Guang Fang. "Gradient of Soil Constitutive Model." Advanced Materials Research 168-170 (December 2010): 1126–29. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.1126.

Full text
Abstract:
For the soil is a very complex natural material, significant strain gradient effect exist in soil analysis. Based on the "gradient" phenomenon, we add the plastic strain gradient hardening item into the traditional Cambridge yield surface. By using the consistency conditions and associated flow rule, we get the explicit expression of plastic strain gradient stiffness matrix. And the finite element method of plastic strain gradient is also shown in this article. Plastic strain gradient is actually a phenomenological non-local model containing microstructure information of the material. It may overcome the difficulties in simulating the gradient phenomenon by traditional mechanical model.
APA, Harvard, Vancouver, ISO, and other styles
7

Yao, Yang-Ping, Haruyuki Yamamoto, and Nai-Dong Wang. "Constitutive Model Considering Sand Crushing." Soils and Foundations 48, no. 4 (August 2008): 603–8. http://dx.doi.org/10.3208/sandf.48.603.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ord, A., B. E. Hobbs, and K. Regenauer-Lieb. "A smeared seismicity constitutive model." Earth, Planets and Space 56, no. 12 (December 2004): 1121–33. http://dx.doi.org/10.1186/bf03353331.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Mróz, Z., N. Boukpeti, and A. Drescher. "Constitutive Model for Static Liquefaction." International Journal of Geomechanics 3, no. 2 (December 2003): 133–44. http://dx.doi.org/10.1061/(asce)1532-3641(2003)3:2(133).

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Frantziskonis, G., C. S. Desai, and S. Somasundaram. "Constitutive Model for Nonassociative Behavior." Journal of Engineering Mechanics 112, no. 9 (September 1986): 932–46. http://dx.doi.org/10.1061/(asce)0733-9399(1986)112:9(932).

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Constitutive Model"

1

Adi, Riyono Winarputro. "CJS-RE : a hierarchical constitutive model for rammed earth." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC036/document.

Full text
Abstract:
Le pisé est une technique constructive vernaculaire consistant à compacter successivement des couches de terre humide entre des coffrages. Cette technique, présente dans le monde entier, l'est en particulier en France dans la région Auvergne-Rhône-Alpes. Comme il n'existe pas de réglementation attachée à cette technique constructive, il est très difficile pour des propriétaires de réparer leur bien. Le développement de cette technique pour de nouveaux projets souffre aussi de cette absence alors qu'elle répond à certains enjeux posés par le Développement Durable. Le travail présenté ici fait partie intégrante du projet national PRIMATERRE dédié à l'étude des constructions impliquant de la terre. Une loi de comportement élasto-plastique est développée dans ce travail pour modéliser le comportement du pisé. Elle s'appuie sur une approche hiérarchisée de la modélisation en lien avec le nombre d'essais disponibles pour identifier les paramètres de modèle mais aussi en lien avec la complexité de phénomènes à prendre en compte. Ce modèle s'inspire d'un modèle pré-existant, CJS, développé en géotechnique pour modéliser le comportement mécanique des matériaux granulaires. Une adaptation s'est imposée pour prendre en compte les spécificités du comportement mécanique du pisé qui possède de nombreuses similitudes avec celui des matériaux quasi-fragiles. Deux niveaux de modélisation pour le modèle de comportement appelé CJS-RE sont présentés, pouvant être utilisés dans un contexte de sollicitation monotone. Le premier niveau CJS-RE1 est un modèle élastique parfaitement plastique alors que le second niveau CJS-RE2 est un modèle élasto-plastique à écrouissage isotrope. Deux mécanismes de déformation plastique sont présents, l'un lié aux phénomènes purement déviatoires et l'autre aux phénomènes de traction. La validation du modèle a été entreprise sur la base de la simulation d'essais en laboratoire de compression diagonale et de chargement latéral (pushover) sur des murets, issus de la littérature. Le niveau CJS-RE1 a été capable de capturer les phénomènes essentiels issus de ces deux tests et peut être utilisé comme une première approches des problèmes. Le niveau CJS-RE2 a permis de retrouver plus précisément le comportement non linéaire du pisé sur une large gamme de déformations, que ce soit dans l'essai de compression diagonale ou dans le pushover. Enfin, la prise en compte d'interfaces entre les couches dans la modélisation semble constituer une approche surdimensionnée lorsque seule la résistance d'un système constitué en pisé est recherchée. Cependant, parce qu'elles apportent une certaine ductilité au système dans la modélisation, elles peuvent être utilisées lorsque des résultats plus détaillés sont attendus
Rammed earth is a vernacular building technique consisting in compacting successively layers of moist earth within formworks. This technique is present worldwide and in particular in the region Auvergne-Rhône-Alpes in France. As no regulation exists for rammed earth structures in France, the owners of such structures are helpless at the time when repairing damages appearing in any aging heritage structures. Moreover, this lack of regulation tends to slow down the development of such a constructive solution in new projects though this technique answers many of the issues raised by the sustainable development. The work presented herein is part of the national research project PRIMATERRE devoted to the study of construction building involving earth. Herein, an elasto-plastic constitutive law is developed for modeling the behavior of rammed earth. It is based on a hierarchical approach of the modeling in relation to the information available to identify the set of model parameters and the refinement of phenomena to be modelled. This model was adapted from a pre-existing CJS model used in advanced foundation engineering for the modelling of granular soils. The necessary adaptation of some mechanisms of the model in the context of rammed earth material which holds the characteristics of a quasi-brittle material is highlighted. Two levels for the model denoted CJS-RE which can be used in the context of monotonous loadings are presented herein. The first level is a simple elastic perfectly plastic model (CJS-RE1) and the second model is an elasto-plastic model with an isotropic hardening (CJS-RE2). Two mechanisms of plastic deformation are involved, one related to purely deviatoric phenomena and one related to tensile phenomena. The validation of the model was performed based on different sets of actual tests including diagonal compression tests and pushover tests on wallets. The simple elasto-plastic model CJS-RE1 was able to capture some basic features for these two tests and may be used for a first estimate of the system resistance. The more sophisticated model CJS-RE2 was found better to retrieve the nonlinear behavior of rammed earth over a larger range of deformations throughout both a diagonal compression test and a pushover test. Finally, the modelling of interfaces between layers of earth seems oversized when the resistance of the system is investigated. However, since they may influence the simulated ductility of the system, they may be used to model the behavior of rammed earth system more precisely
APA, Harvard, Vancouver, ISO, and other styles
2

Kelln, Curtis Gerald. "An elastic-viscoplastic constitutive model for soil." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491999.

Full text
Abstract:
The concepts of elasticity and viscoplasticity were used to develop an elastic-viscoplastic (EVP) constitutive model for soil. The mathematical description of viscoplastic straining includes a measure of both effective stress and the corresponding volumetric packing of the soil particles. The model is able capture the dependence of stress-strain relationships and undrained shear strength on strain rate, the development of irrecoverable plastic strains at constant stress, which is creep, and the relaxation of stresses at constant strain. A Newton-Raphson solution scheme with a stress point algorithm was used to implement the EVP soil model in a finite element program. The algorithms and assumptions required to implement the solution scheme are provided. Verification of the solution scheme is achieved by using it to analyze typical boundary value problems. A case history is developed for a geotextile reinforced highway embankment constructed on a soft estuarine deposit installed with prefabricated vertical drains. The EVP soil model was then used to simulate the measured deformation response. The numerical simulations closely matched the temporal changes in pore water pressures and surface settlement beneath the centerline and shoulder of the embankment. More importantly, the elastic-viscoplastic model simulated the pattern and the magnitudes of the lateral deformations beneath the toe of the embankment;... a notoriously difficult aspect of modelling the deformation response of soft soils. The simulations were achieved using a small set of material constants that can easily be obtained from standard laboratory tests. The research validates the use of the EVP model for problems involving heterogeneous soft soil deposits beneath loading from a geotechnical structure.
APA, Harvard, Vancouver, ISO, and other styles
3

SIMOES, LEONARDO CRAVEIRO. "A CONSTITUTIVE MODEL FOR FIBER REINFORCED CONCRETE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1511@1.

Full text
Abstract:
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Nos últimos 40 anos, tem-se observado um crescente interesse por compósitos formados pela adição de fibras a matrizes de concreto, os chamados concretos reforçados com fibras. Esse interesse é justificado, sobretudo, pelo significativo ganho em tenacidade que as fibras proporcionam, atenuando as características frágeis do concreto. De fato, em virtude do mecanismo de reforço promovido pelas fibras, o concreto com fibras é capaz de absorver muito mais energia de deformação até a ruptura, apresentando, no regime pós-fissuração, um comportamento muito mais suave que o concreto simples. Esse comportamento é acompanhado por um processo de fissuração mais uniforme, no qual observam-se fissuras mais finas e menos espaçadas. Além disso, registram-se aumentos nos valores de resistência do material e nos níveis de deformação que ele atinge até seu completo esgotamento. Tendo em vista os benefícios que as fibras aportam ao desempenho do concreto, seu emprego seria recomendável a estruturas em que a ductilidade é um dos parâmetros principais de projeto, ou naquelas feitas com concretos de alta resistência, uma vez que estes apresentam um comportamento ainda mais frágil que os concretos de resistência normal. Além disso, a utilização de fibras no combate aos esforços de cisalhamento mostra-se extremamente vantajosa e promissora. Neste trabalho, apresenta-se um modelo constitutivo para concreto reforçado com fibras baseado na formulação hipoelástica de ELWI E MURRAY (1979), originalmente proposta para concreto simples. As especificidades do comportamento do concreto com fibras frente às mais diversas solicitações, tais como, tração, compressão e cisalhamento, são incorporadas ao modelo através de relações tensão-deformação adequadas a esse material. Tais relações provêm de estudos analíticos e experimentais sobre o assunto, publicados na literatura técnica especializada. O modelo assim obtido é implementado no programa FEPARCS (ELWI E MURRAY, 1980), capaz de realizar análises númericas não-lineares através do método dos elementos finitos. Por fim, utiliza-se esse program para simular a resposta de uma estrutura de concreto com fibras, cujo ensaio experimental aparece minuciosamente descrito em (CRAIG, 1987). Os resultados numéricos obtidos são comparados com os experimentais correspondentes, em termos da curva carga versus deslocamento, desenvolvimento e distribuição de fissuras, progressão do escoamento da armadura longitudinal (convencional) e modo de ruptura. Avalia-se, então, a eficiência da implementação realizada na descrição do comportamento de estruturas de concreto com fibras.
Along the past forty years, an increasing interest on composite materials formed by the addition of discrete fibers to a concrete matrix is being observed. These composites are known as fiber reinforced concretes. The interest on the use of fibers as reinforcement is justified by their significative contribution to concrete thoughness, as they reduce the brittle characteristics of that material. In fact, due to fiber reinforcement mechanism, fiber reinforced concrete can absorb much more strain energy until failure, in comparison to ordinary concrete. The cracking process seems to be more uniform, as the distance between cracks are reduced. Besides that, the material strength and the deformation levels at cracking and rupture are greater, on the case of fiber reinforced concrete. The benefits that fibers bring to concrete behavior indicate that they could be used as complementary reinforcent for concrete structures when ductility is a major design concern, or when high strength concrete is employed, as this class of material tends to be much more brittle then normal strength concrete. Fibers are also effective as shear reinforcement, and they could even replace stirrups in this function. In this work, a constituive model for fiber reinforced concrete is presented. This model is based on the formulation originally proposed by ELWI AND MURRAY (1979) for the case of ordinary concrete. The behavior characteristcs of fiber reinforced concrete are incorporated as adaquated uniaxial stress-strain relations in tension and compression. The behavior under shear stress is also considered. The model is then implemented in the finite element program FEPARCS (ELWI AND MURRAY, 1980). A numerical analysis on the response of a fiber reinforced concrete structure is conducted. Results reported in technical literature (CRAIG, 1987) are compared to those obtained by the finite element analysis. The efficiency of the model is then verified.
En los últimos 40 anos, se ha observado un creciente interés por compuestos formados por la adición de fibras a matrizes de concreto, los llamados concretos reforzados con fibras. Ese interés se debe a la significativa ganancia en tenacidad que las fibras proporcionan, atenuando las características frágiles del concreto. De hecho, en virtud del mecanismo de refuerzo promovido por las fibras, el concreto con fibras es capaz de absorver mucha más energía de deformación hasta la ruptura, presentando, en el régimen posfisuración, un comportamiento mucho más suave que el concreto simple. Este comportamiento se ve acompañado por un proceso de fisuración más uniforme, en el cual se observan fisuras más finas y menos espaciadas. Además, se registran aumentos en los valores de resistencia del material y en los niveles de deformación que alcanza hasta su completa destrucción. Teniedo en cuenta los beneficios que las fibras aportan al desempeño del concreto, sería recomendable su empleo en extructuras donde la ductilidad es uno de los parámetros principales de proyecto, o en aquellas hechas con concreto de alta resistencia, ya que éstos presentan un comportamiento más frágil que los concretos de resistencia normal. En este trabajo, se presenta un modelo constitutivo para concreto reforzado con fibras que tiene como base la formulación hipoelástica de ELWI Y MURRAY (1979), originalmente propuesta para concreto simple. Las especificidades del comportamiento del concreto con fibras frente a las más diversas solicitudes, tales como, tracción, compresión y cisallamiento, se incorporan al modelo a través de relaciones tensión-deformación adecuadas a ese material. Tales relaciones provienen de estudios analíticos y experimentales sobre el asunto, publicados en la literatura técnica especializada. La implementación del modelo obtenido fue realizada a través del programa FEPARCS (ELWI Y MURRAY, 1980), capaz de realizar análisis númerico no lineal a través del método de los elementos finitos. Por fin, se utiliza ese programa para simular la respuesta de una extructura de concreto con fibras, cuyo ensayo experimental aparece minuciosamente descrito en (CRAIG, 1987). Los resultados numéricos obtenidos se comparan con los experimentales correspondientes, considerando la curva carga versus deslocamiento, desarrollo y distribuición de fisuras, progresión del deslizamiento de la armadura longitudinal (convencional) y modo de ruptura. Se evalúa entonces, la eficiencia de la implementación en la descrición del comportamiento de extructuras de concreto con fibras.
APA, Harvard, Vancouver, ISO, and other styles
4

Kim, Se-Hyung. "Cyclic Uniaxial Constitutive Model For Steel Reinforcement." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51241.

Full text
Abstract:
Reinforced Concrete (RC) structures are common in earthquake-prone areas. During an earthquake, the steel reinforcement is subjected to cyclic strain histories which lead to inelastic response. In the case of rare, strong earthquakes, inelastic buckling and even rupture due to low-cycle fatigue can also occur. The understanding and characterization of the performance of RC structures under earthquake hazards requires the accurate simulation of the inelastic hysteretic behavior of steel reinforcement by means of appropriate constitutive models. Several uniaxial material models have been developed for reinforcing steel. Existing material models sacrifice efficiency for accuracy or vice versa. Conceptually simple and numerically efficient models do not accurately capture the hysteretic response and ignore rupture or buckling. On the other hand, more refined material models are characterized by iterative stress update procedures which can significantly increase the computational cost of an analysis. Additionally, experience suggests that refined models attempting for the effect of inelastic buckling tend to lead to numerical convergence problems in the stress update procedure. The goal of the present study is the formulation and implementation of an accurate and computationally efficient constitutive model for steel reinforcement under cyclic loading. A previously developed model, capable of capturing the inelastic hysteretic response of reinforcing steel in the absence of buckling and rupture, is used as a starting point in this study. The model is enhanced by replacing its original, iterative stress update procedure with an equally accurate, non-iterative one. Additionally, the model is enhanced to capture the effects of inelastic buckling and of rupture. The accuracy of the model and the efficiency of the non-iterative stress update algorithm are demonstrated by means of validation analyses.
Master of Science
APA, Harvard, Vancouver, ISO, and other styles
5

Babbepalli, Venkata Venu Sai Phani Ram. "Implementation of moisturedependent constitutive model for paperboard." Thesis, KTH, Hållfasthetslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284356.

Full text
Abstract:
There has been a considerable increase in the usage of paper products due to its sustainability in the product cycle. Many environmental and process variables can affect the mechanical behavior of paper from its making to finished products. Of these variables, moisture is of particular importance and strongly influences both papermaking, converting, and end-use of the paper products. Experimental investigations at different humidity levels reveals that normalized in-plane constitutive parameters, such as elastic parameters and the linear hardening modulus, in both MD and CD1) follow a linear relationship with normalized moisture ratio. This relation is found to be acceptable for a wide range of commercial paperboards. To capture this observation, a novel material model with orthotropic elasticity and anisotropic hardening2 is proposed. An associative flow rule for the evolution of plastic strain is proposed. The proposed flow rule is such that all stresses contribute to plastic flow rather than an effective stress. A simple version using anisotropic linear hardening is implemented. The mechanical properties, such as elastic parameters and hardening moduli are considered functions of the moisture ratio. An implicit variant of the material model is implemented in LS-DYNA®. The simulations with the proposed material model at different humidity levels follow the experimental results well for uniaxial loading, but discrepancies are obtained for simulation of biaxial loading tests. The moisture is assumed constant in the proposed model since the experiments are done in a moisture-controlled environment.
Användningen av pappersprodukter har ökat avsevärt på grund av dess hållbarhet i produktcykeln. Många miljö- och processvariabler kan påverka papperets egenskaper från tillverkning till färdig produkt. Av dessa variabler är fukt särskilt viktig och fukt påverkar kraftigt både tillverkning, konvertering och slutanvändning av pappersprodukter. En experimentell undersökning vid olika fuktighetsnivåer visar att normaliserade konstitutiva parametrar, såsom elastiska styvheter och tangentmodulen i papperets plan i både MD och CD, uppvisar ett linjärt samband som funktion av normaliserad fuktkvot. Detta samband har visat sig vara en god approximation för ett stort antal kommersiella kartonger. En ny materialmodell baserad på ortotrop elasticitet och anisotropt hårdnande föreslås med hänsyn till detta. En associativ flytlag för plastisk deformation föreslås. Den föreslagna flytlagen är sådan att alla spänningar bidrar till den plastiska deformationen snarare än effektivspänningen. En enklare version baserad på linjärt anisotropt hårdnande har modellerats. De mekaniska egenskaperna såsom styvhet och hårdnandemodul anses vara funktioner av fuktkvoten och följa de linjära sambanden. En implicit variant av materialmodellen är implementerad i LS-DYNA®. Simuleringar med den föreslagna materialmodellen vid olika fuktkvoter följer de experimentella resultaten väl vid enaxlig belastning medan vissa avvikelser uppträder vid tvåaxlig belastning. I den föreslagna modellen antas fukten antas vara konstant eftersom de bakomliggande experimenten genomfördes i en fuktkontrollerad miljö.
APA, Harvard, Vancouver, ISO, and other styles
6

Chen, Cheng-Wei. "A constitutive model for fiber-reinforced soils." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4768.

Full text
Abstract:
Thesis (Ph. D.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Typescript. Vita. Title from title screen of research.pdf file (viewed on March 6, 2009) Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
7

Mei, Zhu. "Structural hybrid simulation with model updating of material constitutive model." Doctoral thesis, Università degli studi di Trento, 2018. https://hdl.handle.net/11572/368550.

Full text
Abstract:
When hybrid simulation (HS) with substructures is employed for assessing the seismic behavior of a large complex structure, it is unrealistic to test all the components that may exhibit strong nonlinearity. Hence, the accuracy of the numerical substructure (NS) faces an increased challenge. To this end, this paper will emphasize on improving the accuracy of the NS in hybrid simulation based on the model updating approach. Most hybrid simulations with model updating (UHS) focus on updating the parameters of the component constitutive model (story shear model) leading to large modeling errors and the unknown detail responses. Moreover, the most extensively used component constitutive models, such as the Bouc-Wen model, are the models in a narrow sense because they are different for various RC members when the size of the component, boundary conditions, axial compression ratio, and the volumetric stirrup ratio are different from one component to the other. Thus, numerous parameters are needed to describe the displacement-force relations of different components, which leads to the huge computational burden. With this respect, this paper proposes a novel hybrid simulation approach based on identifying and updating the parameters of the material constitutive model. The main work and results are concluded as follows, 1. The unified constitutive model of unconfined and confined concrete is derived from the existing uniaxial concrete constitutive models by introducing the volumetric stirrup ratio. 2. To solve the problem that the relation of the measurements (force of the specimen of a RC member) and the identified parameters (concrete constitutive parameters) are difficult to analytical expressed, an OpenSees embedded unscented Kalman filter is proposed for parameter identification. To this end, several parts of the OpenSees source codes are developed and modified. 3. The proposed identification method and hybrid simulation based on updating the concrete constitutive parameters are respectively validated through a monotonic loading test on a RC column and a UHS on a RC frame. The results show that the convergence values of each parameter under various experimental cases are close to each other with a small variance, which indicates that the proposed identification method is robust and reliable. Comparing to the standard HS, the accuracy of the NS, hence the UHS, is significantly improved. 4. Apply the proposed UHS to a RC continuous rigid bridge with tall thin-walled piers. It concludes that the performance of the identification method is still quite good. Contrasting to the simpler structure, the improved accuracy of a large complex structure is even greater. Moreover, the accuracy of the NS can be greatly increased even though the model error is increased. By tuning the initial values of constitutive parameters, the negative influence of model error is decreased to further improve the precision of the NS. By observing the specimen, it is found that the thin-walled hollow section specimen is a bending-shear type damage mode and finally damaged due to the tensile rupture of the stirrup.
APA, Harvard, Vancouver, ISO, and other styles
8

Mei, Zhu. "Structural hybrid simulation with model updating of material constitutive model." Doctoral thesis, University of Trento, 2018. http://eprints-phd.biblio.unitn.it/2959/1/TESI_ZHU_MEI.pdf.

Full text
Abstract:
When hybrid simulation (HS) with substructures is employed for assessing the seismic behavior of a large complex structure, it is unrealistic to test all the components that may exhibit strong nonlinearity. Hence, the accuracy of the numerical substructure (NS) faces an increased challenge. To this end, this paper will emphasize on improving the accuracy of the NS in hybrid simulation based on the model updating approach. Most hybrid simulations with model updating (UHS) focus on updating the parameters of the component constitutive model (story shear model) leading to large modeling errors and the unknown detail responses. Moreover, the most extensively used component constitutive models, such as the Bouc-Wen model, are the models in a narrow sense because they are different for various RC members when the size of the component, boundary conditions, axial compression ratio, and the volumetric stirrup ratio are different from one component to the other. Thus, numerous parameters are needed to describe the displacement-force relations of different components, which leads to the huge computational burden. With this respect, this paper proposes a novel hybrid simulation approach based on identifying and updating the parameters of the material constitutive model. The main work and results are concluded as follows, 1. The unified constitutive model of unconfined and confined concrete is derived from the existing uniaxial concrete constitutive models by introducing the volumetric stirrup ratio. 2. To solve the problem that the relation of the measurements (force of the specimen of a RC member) and the identified parameters (concrete constitutive parameters) are difficult to analytical expressed, an OpenSees embedded unscented Kalman filter is proposed for parameter identification. To this end, several parts of the OpenSees source codes are developed and modified. 3. The proposed identification method and hybrid simulation based on updating the concrete constitutive parameters are respectively validated through a monotonic loading test on a RC column and a UHS on a RC frame. The results show that the convergence values of each parameter under various experimental cases are close to each other with a small variance, which indicates that the proposed identification method is robust and reliable. Comparing to the standard HS, the accuracy of the NS, hence the UHS, is significantly improved. 4. Apply the proposed UHS to a RC continuous rigid bridge with tall thin-walled piers. It concludes that the performance of the identification method is still quite good. Contrasting to the simpler structure, the improved accuracy of a large complex structure is even greater. Moreover, the accuracy of the NS can be greatly increased even though the model error is increased. By tuning the initial values of constitutive parameters, the negative influence of model error is decreased to further improve the precision of the NS. By observing the specimen, it is found that the thin-walled hollow section specimen is a bending-shear type damage mode and finally damaged due to the tensile rupture of the stirrup.
APA, Harvard, Vancouver, ISO, and other styles
9

Junior, Wanderley Camargo Russo. "Desenvolvimento de um modelo hipoplástico que represente efeitos do sobreadensamento." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3145/tde-19092006-170548/.

Full text
Abstract:
São propostas modificações em um modelo hipoplástico buscando representar o comportamento mecânico de argilas sobreadensadas. São introduzidos no modelo a razão de sobreadensamento, o intercepto de coesão e índices que representam características do trecho sobreadensado, resultando em parâmetros com claro sentido físico e de fácil determinação. A equação constitutiva é então calibrada com parâmetros de solos sobreadensados e a capacidade dos modelos de representar o comportamento de dois solos em particular é verificada, confrontando as previsões teóricas com resultados experimentais em diversas situações de carregamento e para uma larga faixa de razões de sobreadensamento. Verifica-se que as modificações introduzidas no modelo hipoplástico contemplam avanços significativos na representação dos efeitos do sobreadensamento, como a curvatura da envoltória de resistência no trecho sobreadensado, o aumento do módulo de deformabilidade com o grau de sobreadensamento, diferente rigidez no carregamento e no recarregamento, o aumento das tensões desviadoras de ruptura em solos sobreadensados, a diminuição da tendência à contração volumétrica com o aumento da razão de sobreadensamento, chegando à expansão volumétrica, e, nas solicitações não-drenadas, pressão neutra negativa quando o solo encontra-se fortemente sobreadensado.
Modifications in a hypoplastic model are proposed intending to represent the mechanical behavior of overconsolidated clays. The overconsolidation ratio, the cohesion intercept and indices that represent overconsolidation characteristics are introduced in the model, resulting in parameters with a clear physical meaning and of easy to determine. The constitutive equation is then calibrated with parameters of overconsolidated soils and the capacity of the models of representing the behavior of two soils in particular is checked, confronting the theoretical predictions with experimental results in several loading situations and in a wide overconsolidation ratio range. It is verified that the modifications introduced into hypoplastic model contemplates significant advances in the representation of the effects of overconsolidation, like the curvature of the strength envelope in the overconsolidation region, the increase of the deformability modulus with the overconsolitadion ratio, different stiffness in loading and reloading, the increase of the deviator stress at failure in overconsolidated soils, presenting peak deviator stress, a decrease of the tendency to volumetric contraction with the increase of the overconsolidation ratio, including to the volumetric expansion, and, in undrained tests, negative pore pressure when the soil is heavily overconsolidated.
APA, Harvard, Vancouver, ISO, and other styles
10

Pisoni, Attilio C. (Attilio Carlo). "A constitutive model for friction in metal-working." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12620.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Constitutive Model"

1

Timmermans, P. Evaluation of a constitutive model for solid polymeric materials. Eindhoven: Eindhoven University of Technology, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zhang, Sherong, Xiaohua Wang, and Chao Wang. Dynamic Mechanical Behaviors and Constitutive Model of Roller Compacted Concrete. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8987-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hamilton, Colin James. A plane strain constitutive model for sands under non monotonic loading. Birmingham: University of Birmingham, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

1928-, Sun C. T., and Langley Research Center, eds. A constitutive model for AS4/PEEK thermoplastic composites under cyclic loading. West Lafayette, IN: Purdue University, School of Aeronautics and Astronautics, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

United States. National Aeronautics and Space Administration., ed. A GENERAL REVERSIBLE HEREDITY CONSTITUTIVE MODEL... NASA-TM-107494... APR. 7, 1998. [S.l: s.n., 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Molenkamp, F. Numerical simulation of cyclic triaxal tests by means of the constitutive model ALTERNAT. Manchester: University of Manchester, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

H, Allen David, Harris Charles E. 1950-, and Langley Research Center, eds. A procedure for utilization of a damage-dependent constitutive model for laminated composites. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

United States. National Aeronautics and Space Administration., ed. On the finite element implementation of the generalized method of cells micromechanics constitutive model. [Washington, DC]: National Aeronautics and Space Administration, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Chan, Gabrielle Ka-Po. Finite element analysis of an embankment dam using the Monot double-hardening constitutive soil model. Manchester: University of Manchester, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Beris, Antony N. Spectral calculations of viscoelastic flows: Evaluation of the Giesekus constitutive equation in model flow problems. Ithaca, N.Y: Cornell Theory Center, Cornell University, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Constitutive Model"

1

Hashiguchi, Koichi. "Viscoplastic Constitutive Equations." In Foundations of Elastoplasticity: Subloading Surface Model, 415–29. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48821-9_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Hashiguchi, Koichi. "Elastic Constitutive Equations." In Foundations of Elastoplasticity: Subloading Surface Model, 153–64. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48821-9_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hashiguchi, Koichi. "Elastic Constitutive Equations." In Foundations of Elastoplasticity: Subloading Surface Model, 189–210. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-93138-4_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Hashiguchi, Koichi. "Elastoplastic Constitutive Equations." In Foundations of Elastoplasticity: Subloading Surface Model, 211–42. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-93138-4_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Hashiguchi, Koichi. "Constitutive Equations of Metals." In Foundations of Elastoplasticity: Subloading Surface Model, 275–315. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48821-9_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Hashiguchi, Koichi. "Constitutive Equations of Soils." In Foundations of Elastoplasticity: Subloading Surface Model, 317–94. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48821-9_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hashiguchi, Koichi. "Constitutive Equations of Metals." In Foundations of Elastoplasticity: Subloading Surface Model, 319–64. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-93138-4_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Hashiguchi, Koichi. "Constitutive Equations of Soils." In Foundations of Elastoplasticity: Subloading Surface Model, 365–431. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-030-93138-4_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Jhun, Choon-Sik, Jonathan F. Wenk, Kay Sun, and Julius M. Guccione. "Constitutive Equations and Model Validation." In Computational Cardiovascular Mechanics, 41–54. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-1-4419-0730-1_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Indraratna, Buddhima, and Trung Ngo. "UOW – constitutive model for ballast." In Ballast Railroad Design: SMART-UOW Approach, 94–102. First edition. | Boca Raton : CRC Press/Balkema, [2018]: CRC Press, 2018. http://dx.doi.org/10.1201/9780429504242-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Constitutive Model"

1

Chieslar, J. D. "A Comprehensive Constitutive Model Solver." In 56th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/arma-2022-0865.

Full text
Abstract:
ABSTRACT: The object-oriented software concept is applied to material mechanics calculations. The result is a comprehensive predictor-corrector which has been employed to solve virtually all of the constitutive exercises in a mature, general-purpose, finite element program. In addition to updating internal variables consistent with global inputs (corrector), the software also produces consistent material tangents (predictor), without resort to formulae. Coupled mechanical-thermal-porous flow problems are addressed as well as compound mechanical responses: creep-plasticity, creep-damage, etc. Material and spatial coordinate transformations are incorporated as well as transformation to and from local material axes. Internal calculations may be undertaken in either spatial or material coordinates, depending upon the native definition. Even viscoelasticity and hyper-viscoelasticity, via Prony series, are efficiently handled by the sparse solver. A tool to exercise any material model, simulating global inputs, is incorporated. Historical plots may be produced and inputs may be cyclical or otherwise simulate complex histories. This is accomplished by using PostScript operators. 1 INTRODUCTION It is perhaps most common in commercial modeling software that each constitutive model is self-contained, that is, each solves the responses and forms the material tangents (algorithm-oriented software design). There is much advantage to be gained by employing a uniform solution/tangent formation strategy for all material models. Indeed, this is the subject of this communication. At first examination, this may seem incongruous considering the different solution strategies employed for different models. For example visco-elasticity, via a prony series, is most often solved by a recursive solution scheme, whereas plasticity would be solved via a Newton-Raphson scheme. Of course, for simplified versions of these models, a forward difference integration scheme is employed, Flac3d, for example. If the constitutive model is algorithmically nonlinear, it is tacitly assumed that any path dependence is captured by taking small time/load steps. The highly nonlinear nature of strain-hardening models, however, generally requires iteration at the constitutive level. This is generally not supported in forward difference programs so the material models in these codes tend to be relatively simple.
APA, Harvard, Vancouver, ISO, and other styles
2

Hom, Craig L., and Natarajan Shankar. "Constitutive model for relaxor ferroelectrics." In 1999 Symposium on Smart Structures and Materials, edited by Vasundara V. Varadan. SPIE, 1999. http://dx.doi.org/10.1117/12.350068.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Reedlunn, Benjamin. "New Salt Constitutive Model Status." In Proposed for presentation at the DOE-EPA Technical Exchange held October 27-27, 2022 in Albuquerque, New Mexico United States. US DOE, 2022. http://dx.doi.org/10.2172/2005737.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Hicher, P. Y., and C. S. Chang. "A Constitutive Model for Lunar Soil." In 11th Biennial ASCE Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40988(323)16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Deng, W., and I. B. Morozov. "Lagrangian Constitutive Model for Bitumen Sands." In 76th EAGE Conference and Exhibition 2014. Netherlands: EAGE Publications BV, 2014. http://dx.doi.org/10.3997/2214-4609.20141406.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Vinogradov, Aleksandra M. "Constitutive model of piezoelectric polymer PVDF." In 1999 Symposium on Smart Structures and Materials, edited by Vasundara V. Varadan. SPIE, 1999. http://dx.doi.org/10.1117/12.350121.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Molenaar, M. M., J. M. Huyghe, and P. A. J. van den Bogert. "A Constitutive Model For Swelling Shales." In SPE/ISRM Rock Mechanics in Petroleum Engineering. Society of Petroleum Engineers, 1998. http://dx.doi.org/10.2118/47332-ms.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Neilsen, Mike, Wei-Yang Lu, Bill Olsson, and Terry Hinnerichs. "A Viscoplastic Constitutive Model for Polyurethane Foams." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14551.

Full text
Abstract:
A series of experiments was recently performed to characterize the mechanical response of several different rigid polyurethane foams to large deformation. In these experiments, the effects of load path, loading rate, and temperature were investigated. Results from these experiments indicated that rigid polyurethane foams exhibit significant volumetric and deviatoric plasticity when they are compressed. Based on these experiments, a foam plasticity model that captures volumetric and deviatoric plasticity was developed. This model has a yield surface that is an ellipsoid about the hydrostat. These polymeric foams were also found to be very strain-rate and temperature dependent. Thus, a new viscoplastic foam model was developed to describe the mechanical response of these foams to large deformation at a variety of temperatures and strain rates. This paper includes a description of recent experiments and experimental findings. Next, development of a foam plasticity model and a viscoplastic foam model is described. Finite element simulations with the new models are compared with experimental results to show behavior that can and cannot be captured with these models.
APA, Harvard, Vancouver, ISO, and other styles
9

Kerali, Anthony G. "Constitutive model for predicting deterioration in concrete." In 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering. RILEM Publications, 2006. http://dx.doi.org/10.1617/2351580028.030.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Li, Keyu. "Experimental evaluation of a viscoplastic constitutive model." In 36th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-1427.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Constitutive Model"

1

Callahan, G. D. Crushed Salt Constitutive Model. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/4127.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Callahan, G. D., M. C. Loken, K. D. Mellegard, and F. D. Hansen. Crushed-salt constitutive model update. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/568994.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Raboin, P. J. A solidification constitutive model for NIKE2D and NIKE3D. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/71390.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bilyk, Stephan R. Dynamic Experiments and Constitutive Model Performance for Polycarbonate. Fort Belvoir, VA: Defense Technical Information Center, July 2014. http://dx.doi.org/10.21236/ada608135.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Messner, M., and T. Sham. Initial High Temperature Inelastic Constitutive Model for Alloy 617. Office of Scientific and Technical Information (OSTI), August 2020. http://dx.doi.org/10.2172/1644689.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Neilsen, M. K., H. S. Morgan, and R. D. Krieg. A phenomenological constitutive model for low density polyurethane foams. Office of Scientific and Technical Information (OSTI), April 1987. http://dx.doi.org/10.2172/6633017.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Dass, William C., and Douglas H. Merkle. Computational Aspects of the ARA Three Invariant Constitutive Model. Fort Belvoir, VA: Defense Technical Information Center, May 1986. http://dx.doi.org/10.21236/ada170072.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Dong, Wen. Linear and Nonlinear Constitutive Model for Piezoelectricity in ALEGRA-FE. Office of Scientific and Technical Information (OSTI), October 2017. http://dx.doi.org/10.2172/1596206.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Rouiller, Vincent, and Gregory B. McKenna. A viscoelastic constitutive model for creep response of polyurethane rubber. Gaithersburg, MD: National Institute of Standards and Technology, 1998. http://dx.doi.org/10.6028/nist.ir.6177.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Young, Steven. MIT-S1 Constitutive Model Calibration for a Portland-area Soil. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.7518.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Constitutive Model' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography