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Journal articles on the topic 'Visco-plastic Damage Model'

Author: Grafiati

Published: 6 September 2023

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1

Wang, Ru Bin, Wei Ya Xu, and Jiu Chang Zhang. "Modeling Coupled Flow-Stress-Damage during Creep Deformation." Applied Mechanics and Materials 204-208 (October 2012): 3294–98. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3294.

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In order to reflect the tertiary rheological characteristics of hard rocks at the high stress states, a new nonlinear visco-elastic-plastic model is proposed on the basis of linear visco-elastic-plastic model and nonlinear visco-elastic-plasticity. And then the corresponding constitutive model are deduced, which can be used for describing rocks’ long-term strength characteristics and their creep deformational behavior and time-dependent damage under interaction of coupled seepage-stress field in rock engineering. At last, considering the time effect of rock damage in the process of tertiary cr

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2

Staub, C., and J. C. Boyer. "An orthotropic ductile damage model for visco-plastic materials." Journal of Materials Processing Technology 60, no. 1-4 (1996): 297–304. http://dx.doi.org/10.1016/0924-0136(96)02345-x.

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3

Wang, X. C., and A. M. Habraken. "An Elastic-Visco-Plastic Damage Model : From Theory to Application." Le Journal de Physique IV 06, no. C6 (1996): C6–549—C6–558. http://dx.doi.org/10.1051/jp4:1996655.

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4

Wang, Xingkai, Leibo Song, Caichu Xia, Guansheng Han, and Zheming Zhu. "Nonlinear Elasto-Visco-Plastic Creep Behavior and New Creep Damage Model of Dolomitic Limestone Subjected to Cyclic Incremental Loading and Unloading." Sustainability 13, no. 22 (2021): 12376. http://dx.doi.org/10.3390/su132212376.

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For many rock engineering projects, the stress of surrounding rocks is constantly increasing and decreasing during excavating progress and the long-term operation stage. Herein, the triaxial creep behavior of dolomitic limestone subjected to cyclic incremental loading and unloading was probed using an advanced rock mechanics testing system (i.e., MTS815.04). Then, the instantaneous elastic strain, instantaneous plastic strain, visco-elastic strain, and visco-plastic strain components were separated from the total strain curve, and evolutions of these different types of strain with deviatoric s

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5

Pedersen, R. R., A. Simone, and L. J. Sluys. "An analysis of dynamic fracture in concrete with a continuum visco-elastic visco-plastic damage model." Engineering Fracture Mechanics 75, no. 13 (2008): 3782–805. http://dx.doi.org/10.1016/j.engfracmech.2008.02.004.

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6

KANG, GUOZHENG, JUN DING, and YUJIE LIU. "DAMAGE-COUPLED CONSTITUTIVE MODEL FOR UNIAXIAL RATCHETING AND FATIGUE FAILURE OF 304 STAINLESS STEEL." International Journal of Modern Physics B 22, no. 31n32 (2008): 5419–24. http://dx.doi.org/10.1142/s0217979208050590.

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Based on the existed experimental results of 304 stainless steel, the evolution of fatigue damage during the stress-controlled cyclic loading was discussed first. Then, a damage-coupled visco-plastic cyclic constitutive model was proposed in the framework of unified visco-plasticity and continuum damage mechanics to simulate the whole-life ratcheting and predict the fatigue failure life of the material presented during the uniaxial stress-controlled cyclic loading with non-zero mean stress. In the proposed model, the whole life ratcheting was described by employing a non-linear kinematic harde

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7

Lee, Chi Seung, Myung Hyun Kim, Min Sung Chun, Tak Kee Lee, and Jae Myung Lee. "Fatigue Damage Model for Numerical Assessment of Fatigue Characteristics." Materials Science Forum 580-582 (June 2008): 663–66. http://dx.doi.org/10.4028/www.scientific.net/msf.580-582.663.

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The aim of this study is the development of a numerical technique applicable for the fatigue assessment based on the damage mechanics approach. The generalized elasto-visco-plastic constitutive equation, which can consider the internal damage evolution behavior, is developed in order to numerically evaluate the material fatigue responses. Explicit information of the relationships between the mechanical properties and material constants, which are required for the mechanical constitutive and damage evolution equations, are derived. The performance of the developed technique has been verified us

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8

Rahaman, Md Masiur, Abhishek Pathak, and Debasish Roy. "A thermo-visco-plastic damage model and SPH simulations of plugging failure." Mechanics of Advanced Materials and Structures 25, no. 15-16 (2017): 1374–82. http://dx.doi.org/10.1080/15376494.2017.1286419.

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9

Wang, Qing-duo, Feng-hai Yu, Aleksei Renev, Sergei Tsibaev, and Xue-rui Yang. "The analysis of rheological damage of anchorage body based on visco-elasto-plastic model." E3S Web of Conferences 303 (2021): 01060. http://dx.doi.org/10.1051/e3sconf/202130301060.

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In order to study the rheological damage of anchorage body, rheological damage model of anchorage body is established in this paper, and it is based on visco-elasto plastic model that is often used to simulate rock rheological characteristics. The expressions of creep constitutive equation and elastic modulus of anchorage body are obtained through the analysis of rheological damage model of anchorage body, and by the fitting calculation results, finding that the theoretical creep curve is matched with the experimental creep curve under certain conditions. The research conclusions have critical

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10

Luo, Yan, and Qing Gao. "A Damage-Coupled Time-Dependent Multi-Axial Fatigue Failure Model for Solder Alloy 63Sn-37Pb." Applied Mechanics and Materials 128-129 (October 2011): 361–66. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.361.

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Based on the time-dependent deformation behavior of solder alloy 63Sn-37Pb at room temperature, a damage-coupled unified visco-plastic multi-axial fatigue model and its failure criterion were proposed. In the evolution equation of damage for the model, the time-dependent effect of damage was taken into account. The model was used to predict the fatigue life under different loading paths. The comparison between the predicted and experimental results demonstrated that the time-dependent failure model can simulate the deformation behavior and predict the fatigue life well under different nonpropo

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11

Kim, Kunhwi, John E. Bolander, and Yun Mook Lim. "Rigid-Body-Spring Network with Visco-Plastic Damage Model for Simulating Rate Dependent Fracture of RC Structures." Applied Mechanics and Materials 82 (July 2011): 259–65. http://dx.doi.org/10.4028/www.scientific.net/amm.82.259.

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The mechanical properties of concrete materials vary with the loading rate underdynamic conditions, which can inﬂuence the dynamic fracture behavior of structures. The ratedependency is reported as due to the microscopic mechanisms, such as a material inertia eﬀectand the Stefan eﬀect. In this study, the rigid-body-spring network (RBSN) is employed forthe fracture analysis, and the visco-plastic damage model is implemented to represent the rateeﬀect in this macroscopic simulation framework. The parameters in the Perzyna type visco-plastic formulation are adjusted through the direct tensile tes

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12

Kang, Guozheng, Yujie Liu, Jun Ding, and Qing Gao. "Uniaxial ratcheting and fatigue failure of tempered 42CrMo steel: Damage evolution and damage-coupled visco-plastic constitutive model." International Journal of Plasticity 25, no. 5 (2009): 838–60. http://dx.doi.org/10.1016/j.ijplas.2008.06.004.

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13

Suzuki, Jorge, Yongtao Zhou, Marta D’Elia, and Mohsen Zayernouri. "A thermodynamically consistent fractional visco-elasto-plastic model with memory-dependent damage for anomalous materials." Computer Methods in Applied Mechanics and Engineering 373 (January 2021): 113494. http://dx.doi.org/10.1016/j.cma.2020.113494.

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14

Gui, Zhong-xiang, Xiao Hu, and Zi-jian Wang. "An elasto-visco-plastic constitutive model of polypropylene incorporating craze damage behavior and its validation." Journal of Central South University 24, no. 6 (2017): 1263–68. http://dx.doi.org/10.1007/s11771-017-3530-9.

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15

Münstermann, Sebastian, Pawel Kucharczyk, Georg Golisch, and Benedikt Döbereiner. "Phenomenological Modelling of Impact Toughness Transition Behaviour." Applied Mechanics and Materials 784 (August 2015): 27–34. http://dx.doi.org/10.4028/www.scientific.net/amm.784.27.

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The toughness transition behavior of ferritic steel results from the fact that two competing fracture mechanisms can be activated independently or progressively. Temperature, strain rate and the material ́s hardening properties are the major influences affecting the result of this competition between cleavage and ductile fracture mechanisms. An elastic visco-plastic plasticity model with stress-state dependent yielding and isotropic hardening forms the basis of a model to predict the Charpy impact toughness properties of steels with bcc crystal structure for transition behavior. A scalar damag

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16

Frija, Mounir, Raouf Fathallah, and T. Hassine. "Finite Element Prediction of Laser Shock Peened Surface Modifications in Ti-6Al-4V Alloy." Key Engineering Materials 417-418 (October 2009): 853–56. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.853.

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This paper presents a numerical simulation of the Laser Shock Peening process (LSP) using ﬁnite element method. The majority of the controlling parameters of the process have been taken into account. The laser loading has been characterised by using a repetitive time Gaussian increment pressure applied uniformly at circular impacted zone. The behavior of the subjected material is supposed to be elasto-visco-plastic coupled with damage using the Johnson Cook law with his shear failure model. The proposed model leads to obtain the surface inducing modifications, which are classified in this work

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17

Darbha, K., J. H. Okura, and A. Dasgupta. "Thermomechanical Durability Analysis of Flip Chip Solder Interconnects: Part 1—Without Underfill." Journal of Electronic Packaging 121, no. 4 (1999): 231–36. http://dx.doi.org/10.1115/1.2793845.

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A generalized multi-domain Rayleigh-Ritz (MDRR) approach developed by Ling and Dasgupta (1995), is extended in this paper, to obtain the stress field in flip chip solder interconnects, under cyclic thermal loading. Elastic, Plastic and time-dependent visco-plastic analysis is demonstrated on flip chip solder interconnects. The method has been applied to other surface-mount interconnects in the past such as J-lead (Ling and Dasgupta, 1996a) and ball-grid joints (Ling and Dasgupta, 1997). The analysis results for the J-lead and ball grid joints have confirmed that the MDRR technique is capable o

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18

YOSHIDA, Junji, and Toshiyuki SUGIYAMA. "A HYPERELASTIC VISCO-ELASTO-PLASTIC DAMAGE MODEL FOR RUBBER-LIKE SOLIDS INCLUDING STRAIN-DEPENDENCY OF HYSTERETIC LOOPS." Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 71, no. 1 (2015): 14–33. http://dx.doi.org/10.2208/jscejam.71.14.

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19

Alwar, R. S., P. Chellapandi, and S. B. Bhoje. "Assessment of Life of Inner Vessel for a Pool-Type Fast Breeder Reactor Based on Inelastic and Viscoplastic Deformations." Journal of Pressure Vessel Technology 115, no. 2 (1993): 185–92. http://dx.doi.org/10.1115/1.2929514.

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Towards assessing the creep-fatigue damage for the inner vessel of a pool-type fast reactor, 3-D elastic and axisymmetric inelastic analysis with classical kinematic hardening model, ORNL material model and more realistic CHABOCHE visco-plastic model have been performed. The material properties of stainless steel type 316 LN at various temperatures are used in the analysis. Using the results of this analysis, the creep-fatigue damage and ratcheting are assessed as per the rules of RCC-MR and results have been compared for the various constitutive models used. Inelastic analysis has been perfor

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20

Li, Ming, Hai Pu, and Lili Cao. "Variable-order fractional creep model of mudstone under high-temperature." Thermal Science 21, suppl. 1 (2017): 343–49. http://dx.doi.org/10.2298/tsci17s1343l.

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In order to study the properties of high-temperature creep for mudstone, MTS810 electro-hydraulic servo material test system and MTS652.02 high temperature furnace are utilized for the creep test of mudstone at 700?C. Considering the visco-elastic-plastic characteristics and the damage effect, the variable-order fractional creep model is established to research the creep character, and it is found that the proposed model can be well fitting of our experimental results. Especially, variable-order function can be used to analyze and study the viscoelastic property evolution of mudstone in proces

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21

Zhang, Jie, Abel Cherouat, and Houman Borouchaki. "3D Thermo-Mechanical Simulation Coupled with Adaptive Remeshing for Metal Milling." Advanced Materials Research 698 (May 2013): 11–20. http://dx.doi.org/10.4028/www.scientific.net/amr.698.11.

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As a material removal process, metal milling process involves large geometry deformation, material thermo-visco-plastic flow coupled with damage and complex contact-friction problems. During simulation of metal milling, the finite elements distort severely at the local regions with high gradient of physical field such as stress, strain and temperature due to these problems. This paper presents numerical adaptive remeshing procedure dedicated to metal milling process. The procedure integrates Explicit solver of ABAQUS, OPTIFORM mesher and python script program transfer to execute step by step t

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22

Bian, Hanbing, Xiaotian Zhang, and Jianfu Shao. "A coupled elastoplastic and visco-plastic damage model for hard clay and its application for the underground gallery excavation." Underground Space 2, no. 1 (2017): 60–72. http://dx.doi.org/10.1016/j.undsp.2017.03.002.

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23

CHEN, HONGJIE, WEIYA XU, WEI WANG, RUBIN WANG, and CHONG SHI. "A NONLINEAR VISCOELASTIC-PLASTIC RHEOLOGICAL MODEL FOR ROCKS BASED ON FRACTIONAL DERIVATIVE THEORY." International Journal of Modern Physics B 27, no. 25 (2013): 1350149. http://dx.doi.org/10.1142/s021797921350149x.

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The soft-matter element between the ideal solid and the ideal liquid is established and is described based on the definition of the fractional derivatives. By replacing a component in the generalized Kelvin model with the soft-matter component and connecting it in series with a nonlinear visco-plastic body, a nonlinear viscoelasto-plastic rheological model is proposed based on the fractional derivatives in order to describe the rheological behaviors of rocks. The data obtained from the triaxial creep tests of a typical rock are simulated with this model and the fitting result is good. The mode

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24

Lis, Adrian, Koji Asama, Tomoki Matsuda, Tomokazu Sano, and Akio Hirose. "Strength assessment for direct-sintered Al2O3-to-Cu joints based on damage modeling." International Symposium on Microelectronics 2017, no. 1 (2017): 000613–18. http://dx.doi.org/10.4071/isom-2017-tha51_123.

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Abstract Metal-to-ceramics direct sintering was carried out with Al2O3 and Cu / 3 μm Ni / 1 μm Au substrates. The bonding paste consisted of micron-sized Ag2O particles and a reducing solvent that provokes Ag2O-to-Ag reduction during processing accompanied by the formation of Ag nano particles. Five different sets of process parameters resulted in different joint microstructure and strength. The experimental data was used to calibrate an elasto-visco-plastic finite element model of the sintered assembly which yielded a quantitative damage function and criterion to predict the strength of direc

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25

Zheng, Kai Lun, Lei Zhu, Denis J. Politis, Jian Guo Lin, and Trevor A. Dean. "An Analytical and Numerical Investigation on Flange Wrinkling Behavior in Warm Forming Process of AA5754 Using Macro-Textured Tool Design." Key Engineering Materials 716 (October 2016): 586–94. http://dx.doi.org/10.4028/www.scientific.net/kem.716.586.

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In this paper, an analytical buckling model is established to predict the flange wrinkling behavior of deep drawn cylindrical cups of aluminium alloy sheet in warm forming conditions using macro-textured blankholders for the first time. A continuum damage mechanism (CDM) based material model was utilized to reflect the visco-plastic feature of material at elevated temperatures. Forming speed and temperature effects were investigated, and texture ratio and draw ratio effects were also discussed. The developed analytical buckling model was validated by finite element simulations. The increase of

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26

Zohravi, Sara Ebrahimi, Ali Lakirouhani, Hamed Molladavoodi, Jurgis Medzvieckas, and Romualdas Kliukas. "A NEW CONSTITUTIVE MODEL FOR THE TIME-DEPENDENT BEHAVIOR OF ROCKS WITH CONSIDERATION OF DAMAGE PARAMETER." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 28, no. 3 (2022): 223–31. http://dx.doi.org/10.3846/jcem.2022.16609.

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Deformation and time-dependent behavior of rocks are closely related to the stability and safety of underground structures and mines. In this paper, a numerical-analytical model is presented to investigate time-dependent damage and deformation of rocks under creep. The proposed model is obtained by combining the elastic-visco-plastic model based on the theory of over-stress and stress hardening law with the sub-critical crack growth model. The advantage of this model is that it is in incremental form and therefore can be implemented numerically. First, the governing equations of the model and

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27

Zhang, Jie, Abel Cherouat, and Houman Borouchaki. "FE Simulation of Metal Orthogonal Cutting Processes Based on 3D Adaptive Remeshing Procedure." Advanced Materials Research 409 (November 2011): 461–66. http://dx.doi.org/10.4028/www.scientific.net/amr.409.461.

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Metal orthogonal cutting process involves complex geometry deformation and mate-rial characteristics as large thermal-visco-plastic ow include ductile damage. Simultaneously,the contact with friction occurs in the same zone. To build the nite element model for metalcutting, the nite element mesh will be severely distorted at the region with high gradientof stress/strain/temperature eld. In this paper, a Adaptive remeshing procedure which inte-grates the 3D OPTIFORM mesher, ABAQUS/Explicit solver and eld node-node eld transferalgorithm are proposed to solve these problems. The thermal-mechanica

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28

Zhao, X. J., G. Q. Zhang, J. F. J. M. Caers, and L. J. Ernst. "Solders Fatigue Prediction Using Interfacial Boundary Volume Criterion." Journal of Electronic Packaging 125, no. 4 (2003): 582–88. http://dx.doi.org/10.1115/1.1604160.

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In this paper, an “interfacial boundary volume” based damage criterion was proposed in combination with the modified Coffin-Manson model to predict solder fatigue. This criterion assumes that mainly, the behavior of the thin solder layer at chip pad interface contributes to the solder fatigue, not the whole solder joint or the averaged strains from randomly selected elements. The damage parameter was thus calculated by averaging the visco-plastic strain range over the interfacial boundary layer volume in the solder and later related to the corresponding fatigue life of experimental test throug

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29

Zhang, Chunyang, Ping Zou, Yixian Wang, Tingting Jiang, Hang Lin, and Ping Cao. "An elasto-visco-plastic model based on stress functions for deformation and damage of water-saturated rocks during the freeze-thaw process." Construction and Building Materials 250 (July 2020): 118862. http://dx.doi.org/10.1016/j.conbuildmat.2020.118862.

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30

Tamin, M. N., and H. Ghonem. "Fatigue Damage Mechanisms of Bridging Fibers in Titanium Metal Matrix Composites1." Journal of Engineering Materials and Technology 122, no. 4 (2000): 370–75. http://dx.doi.org/10.1115/1.1288770.

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This paper investigates the fatigue damage mechanisms of SiC fibers bridging a fatigue crack in unidirectional reinforced titanium matrix composites. For this purpose, an experimental/computational fiber fracture model is developed on the basis of the occurrence of two damage events taking place along a bridging fiber. These events are the time-dependent evolution of axial stresses and the simultaneous strength degradation of the fiber due to cyclic-related damage processes. The stress evolution in a fiber is calculated using the finite element method employing a cylinder model of a fiber embe

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31

Rajhi, W. "Numerical Simulation of Damage on Warm Deep Drawing of Al 6061-T6 Aluminium Alloy." Engineering, Technology & Applied Science Research 9, no. 5 (2019): 4830–34. http://dx.doi.org/10.48084/etasr.3148.

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This work focuses on the numerical simulation of warm deep drawing operation of car sump oil made with Al 6061-T6 aluminum alloy for the purpose of process optimization. The thermo visco-plastic behavior with damage effect of the material is described by the Johnson-Cook (JC) model. The JC model parameters for the Al 6061-T6 Aluminum alloy were exploited. Numerical simulation of the deep drawing operation was performed with the use of the ABAQUS FE software thanks to the dynamic Explicit Temperature-Displacement algorithm. The design of the different tools is obtained on the basis of the geome

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32

Torres, Dery, Shu Guo, Maria-Pilar Villar, Daniel Araujo, and Rafael Estevez. "Calibration of a Cohesive Model for Fracture in Low Cross-Linked Epoxy Resins." Polymers 10, no. 12 (2018): 1321. http://dx.doi.org/10.3390/polym10121321.

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Polymer-based composites are becoming widely used for structural applications, in particular in the aeronautic industry. The present investigation focuses on the mechanical integrity of an epoxy resin of which possible damage results in limitation or early stages of dramatic failure. Therefore, a coupled experimental and numerical investigation of failure in an epoxy resin thermoset is carried out that opens the route to an overall micromechanical analysis of thermoset-based composites. In the present case, failure is preceded by noticeable plasticity in the form of shear bands similar to obse

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33

Signoret, Charles, Anne-Sophie Caro-Bretelle, José-Marie Lopez-Cuesta, Patrick Ienny, and Didier Perrin. "Impact of PP Impurities on ABS Tensile Properties: Computational Mechanical Modelling Aspects." Polymers 13, no. 10 (2021): 1647. http://dx.doi.org/10.3390/polym13101647.

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Recycling of plastics is hindered by their important variety and strong incompatibility. However, sorting technologies bear costs and meet limits. Very high purities (<2 wt%) are difficult to reach. Yet, such rates may be detrimental to functional properties. In this work, an ABS matrix (major plastic in Waste of Electrical and Electronic Equipments) was filled with 4 wt% of PP to mimic impurities in ABS after recycling. PP-g-MA was introduced in the blend to improve the compatibility. A finite element model was developed from the mechanical behavior of each component. ABS and PP were indiv

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34

Puzrin, Alexander M., and Andreas Schmid. "Progressive failure of a constrained creeping landslide." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 467, no. 2133 (2011): 2444–61. http://dx.doi.org/10.1098/rspa.2011.0063.

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The ski resort town of St Moritz, Switzerland, is partially constructed on a large creeping landslide, which has been causing damage to buildings and infrastructure. At the town centre, the landslide is constrained by a rock outcrop, creating a compression zone in the sliding mass. After decades of gradual slowing down,s in the beginning of 1990s the landslide started to accelerate, in spite of the fact that the average yearly precipitation and the pore water pressure on the sliding surface remained fairly constant. The paper shows that a constrained creeping landslide experiences progressive

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Wang, Xingkai, Wansheng Wei, Yong Niu, et al. "Triaxial Creep Mechanical Behaviors and Creep Damage Model of Dolomitic Limestone Material under Multi-Stage Incremental Loading." Materials 16, no. 5 (2023): 1918. http://dx.doi.org/10.3390/ma16051918.

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Dolomitic limestone is the main surrounding rock material in Yangzong tunnel engineering; the instantaneous mechanical properties and creep behaviors of limestone are significant for stability evaluation during the stages of tunnel excavation and long-term maintenance. Herein, four conventional triaxial compression tests were carried out to explore its instantaneous mechanical behavior and failure characteristics; subsequently, the creep behaviors of limestone subjected to multi-stage incremental axial loading at the confinements of 9 MPa and 15 MPa were studied by employing an advanced rock m

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36

Ranjith Kumar, G., and G. Rajyalakshmi. "Taguchi Grey Relational Approach for Optimizing Process Parameters of Laser Peening on Titanium Alloy to Induce Enhanced Compressive Stress based on Finite Element Simulation." Journal of Advanced Manufacturing Systems 19, no. 02 (2020): 365–87. http://dx.doi.org/10.1142/s0219686720500183.

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Laser Shock Peening (LSP) turned out to be the most efficient surface engineering process for advanced materials to induce beneficial deep compressive residual stress which helps in improving mechanical, fatigue properties and surface damage resistance. But, analyzing the nonuniform distribution of residual stresses in the treated sample with X-ray diffraction (XRD) is much time taking and a costly process. This problem can be resolved with LSP finite element numerical simulation model which is feasible with the realistic experimental process. The FE model allows the user to control the laser

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Allen, Robert, Laszlo Toth, Andrew Oppedal, and Haitham El Kadiri. "Crystal Plasticity Modeling of Anisotropic Hardening and Texture Due to Dislocation Transmutation in Twinning." Materials 11, no. 10 (2018): 1855. http://dx.doi.org/10.3390/ma11101855.

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In crystalline materials, dislocations are three-dimensional lattice distortions that systematically distort twin interfaces that they encounter. This results in dislocation dissociation events and changes in the atomic structure of the interface. The manner in which the interface distorts drive the product of the dissociation event, and consequently, the incident dislocation core and the magnitude and relative direction of the Burgers vector govern these slip-twin interaction phenomena. Recent characterization studies using transmission electron microscopy as well as advanced molecular dynami

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38

Preuss, Simon, Jean Paul Ampuero, Taras Gerya, and Ylona van Dinther. "Characteristics of earthquake ruptures and dynamic off-fault deformation on propagating faults." Solid Earth 11, no. 4 (2020): 1333–60. http://dx.doi.org/10.5194/se-11-1333-2020.

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Abstract. Natural fault networks are geometrically complex systems that evolve through time. The evolution of faults and their off-fault damage patterns are influenced by both dynamic earthquake ruptures and aseismic deformation in the interseismic period. To better understand each of their contributions to faulting we simulate both earthquake rupture dynamics and long-term deformation in a visco-elasto-plastic crust subjected to rate- and state-dependent friction. The continuum mechanics-based numerical model presented here includes three new features. First, a 2.5-D approximation is created

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Chen, Bao, Xuan Cang Wang, and Ke Mu. "Mechanical Response of Longitudinal Slope Segments Based on Burgers Model." Advanced Materials Research 243-249 (May 2011): 4172–77. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.4172.

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Asphalt Pavement was damaged more seriously in longitudinal Gradient than common segment because of its special load bearing conditions. This paper establishes a 3D Visco-elasto-plastic Finite Element to analyses the stress respond of pavement structure, calculating the discipline of stress behaviors under different gradient. Burgers model was used to study the factors which can influence on tracking, for example longitudinal Gradient, speeds and frequency of axle load. Result of calculation show that the maximum shear stress grows as the gradient increases. Rutting of pavement was small befor

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40

Konrad, Julian, Sebastian Pfaller, and Dirk Zahn. "Multi-Scale Modelling of Plastic Deformation, Damage and Relaxation in Epoxy Resins." Polymers 14, no. 16 (2022): 3240. http://dx.doi.org/10.3390/polym14163240.

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Epoxy resin plasticity and damage was studied from molecular dynamic simulations and interpreted by the help of constitutive modelling. For the latter, we suggested a physically motivated approach that aims at interpolating two well-defined limiting cases; namely, pulling at the vanishing strain rate and very rapid deformation; here, taken as 50% of the speed of sound of the material. In turn, to consider 0.1–10-m/s-scale deformation rates, we employed a simple relaxation model featuring exponential stress decay with a relaxation time of 1.5 ns. As benchmarks, deformation and strain reversal r

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Zhao, Baoyun, Yingjie Wu, Jiaosheng Yang, et al. "Mechanical Properties of Gas Storage Sandstone under Uniaxial Cyclic Loading and Unloading Condition." Periodica Polytechnica Civil Engineering, March 6, 2023. http://dx.doi.org/10.3311/ppci.21620.

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In order to study the mechanical properties and damage evolution of the gas storage surrounding rock under the periodic injection-production process, the uniaxial cyclic loading and unloading tests of sandstone were carried out by TFD-2000 microcomputer servo-controlled rock triaxial testing machine. Results shown that the compressive strength of gas storage sandstone specimens were gradually decreases with increasing of the stress amplitude after 200 cycles. The stress-strain curve under uniaxial cyclic loading and unloading condition formed hysteresis loops, and the hysteresis loop presented

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42

Xu, Guowen, Marte Gutierrez, Ketan Arora, and Xin Wang. "Visco-plastic response of deep tunnels based on a fractional damage creep constitutive model." Acta Geotechnica, May 29, 2021. http://dx.doi.org/10.1007/s11440-021-01226-5.

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Zhang, Xing, Hang Lin, Huihua Hu, Yanhui Cheng, and Wanyi Zhang. "A nonlinear rheological shear constitutive model of bolted joints considering initial damage and damage evolution." International Journal of Damage Mechanics, June 29, 2023. http://dx.doi.org/10.1177/10567895231183468.

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Understanding the shear mechanics mechanism of bolted joints is of great significance for predicting and preventing geological disasters. Most current studies seldom consider the rheological effects of bolted joints. In this paper, a comprehensive rheological constitutive model is proposed, accounting for initial damage and damage evolution across different rheological stages and bolt characteristics. The model incorporates an elastoplastic Hooke body for instantaneous deformation, parametric nonlinear Kelvin and viscous models for attenuation and steady creep stages, and a visco-plastic model

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Huo, Yuanming, Wanbo Yang, Tao He, Jie Bai, Jianye Gao, and Cunlong Huo. "A Novel Unified Visco-Plastic Damage Constitutive Model Considering Stress State of TC16 Titanium Alloy during Cold Deformation." Journal of Materials Engineering and Performance, October 3, 2022. http://dx.doi.org/10.1007/s11665-022-07415-x.

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"Numerical Modeling the Effects of Chamfer and Hone Cutting Edge Geometries on Burr Formation." WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS 15 (December 7, 2020). http://dx.doi.org/10.37394/232011.2020.15.17.

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A finite element based numerical model to simulate orthogonal machining process and associated burr formation process has been developed in the presented work. To incorporate simultaneous effects of mechanical and thermal loadings in high speed machining processes, Johnson and Cook`s thermo-visco-plastic flow stress model has been adopted in the conceived numerical model. A coupled damage-fracture energy approach has been used to observe damage evolution in workpiece and to serve as chip separation criterion. Simulation results concerning chip morphology, nodal temperatures, cutting forces and

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Yamaguchi, Yuya, Fumiyasu Makinoshima, and Yusuke Oishi. "Simulating the entire rainfall-induced landslide process using the material point method for unsaturated soil with implicit and explicit formulations." Landslides, May 2, 2023. http://dx.doi.org/10.1007/s10346-023-02052-4.

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AbstractRainfall-induced landslides cause various types of damage, including damage to infrastructure, leading to devastating economic losses and human casualties. Although various numerical methods have been developed to predict landslide occurrence and the extent of sediment flow, three-dimensional analysis of the entire landslide process in a unified manner is still challenging owing to limitations in computational efficiency and the representation of deformation and flow. In this study, we present a numerical method of rainfall-induced landslides using the coupled hydromechanical material

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Yao, Yao, Xu Long, and Leon M. Keer. "A Review of Recent Research on the Mechanical Behavior of Lead-Free Solders." Applied Mechanics Reviews 69, no. 4 (2017). http://dx.doi.org/10.1115/1.4037462.

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Due to the restriction of lead-rich solder and the miniaturization of electronic packaging devices, lead-free solders have replaced lead-rich solders in the past decades; however, it also brings new technical problems. Reliability, fatigue, and drop resistance are of concern in the electronic industry. The paper provides a comprehensive survey of recent research on the methodologies to describe the mechanical behavior of lead-free solders. In order to understand the fundamental mechanical behavior of lead-free solders, the visco-plastic characteristics should be considered in the constitutive

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"Nuclear Containment Wall under Aircraft Crash." International Journal of Recent Technology and Engineering 8, no. 3 (2019): 3249–56. http://dx.doi.org/10.35940/ijrte.c5408.098319.

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The safety analysis of important structure such as nuclear power plant against commercial aircraft has been studied. In the present study, a stepwise sequential analysis has been performed to determine the stresses on the nuclear containment wall under aircraft crash and induced fire effects. ABAQUS/Implicit finite element code was followed to get the response of the nuclear containment. First, the impact load is applied on the containment using Riera force history curve of Boeing 707-320, after 0.16 sec nodal temperatures were increased following the proposed jet fuel curve to imitate fire as

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