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Artykuły w czasopismach na temat „Large deformation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 11 marca 2023

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1

Speich, Marco, Wolfgang Rimkus, Markus Merkel i Andreas Öchsner. "Large Deformation of Metallic Hollow Spheres". Materials Science Forum 623 (maj 2009): 105–17. http://dx.doi.org/10.4028/www.scientific.net/msf.623.105.

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Hollow sphere structures are a new group of advanced lightweight materials for multifunctional applications. Within the scope of this paper, the uniaxial deformation behaviour in the regime of large deformations is investigated. Appropriate computational models are developed to account for the deformation mechanisms occurring under high deformations. Macroscopic stress-strain curves are derived and the influence of different material parameters is investigated.

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2

Sekhon, G. S. "Large Deformation II". Defence Science Journal 53, nr 2 (1.04.2003): 25–26. http://dx.doi.org/10.14429/dsj.53.2262.

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3

Sekhon, G. S. "Large Deformation -I". Defence Science Journal 53, nr 1 (1.01.2003): 3–4. http://dx.doi.org/10.14429/dsj.53.2270.

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4

Bruhns, Otto T. "Large deformation plasticity". Acta Mechanica Sinica 36, nr 2 (12.02.2020): 472–92. http://dx.doi.org/10.1007/s10409-020-00926-7.

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5

Fan, Jinyan, Zhibiao Guo, Xiaobing Qiao, Zhigang Tao, Fengnian Wang i Chunshun Zhang. "Constant Resistance and Yielding Support Technology for Large Deformations of Surrounding Rocks in the Minxian Tunnel". Advances in Civil Engineering 2020 (28.09.2020): 1–13. http://dx.doi.org/10.1155/2020/8850686.

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During the excavation of the Minxian tunnel, problems of large deformations of surrounding rocks and failure of support structures appeared frequently, which caused serious influences on construction safety and costs of the tunnel. Based on laboratory analysis of mineral composition and field investigations on deformation characteristics of the surrounding rocks, the large deformation mechanism of surrounding rocks of the tunnel was considered as water-absorbing swelling molecules of carbonaceous slate and stress-induced asymmetric structural deformations of the surrounding rocks. The structural deformations of surrounding rocks mainly include bending deformation, interlayer sliding, and crushing failure of local rock blocks. Then, a new constant resistance and yielding support technology based on the constant resistance and large deformation (CRLD) anchor cable was proposed to control large deformations of surrounding rocks. The field tests and deformation monitoring were carried out. The monitoring results showed that compared with original support measure, the surrounding rock deformations, stresses of primary supports, and permanent lining using new support technology decreased greatly. Among them, the maximum deformation of surrounding rock was only 73 mm. The effects of field application and results of deformation monitoring showed that the new support technology can effectively control large deformations of the surrounding rocks in the Minxian tunnel.

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6

Zhao, Gang, Liuyu Wang, Kazhong Deng, Maomei Wang, Yi Xu, Meinan Zheng i Qing Luo. "An Adaptive Offset-Tracking Method Based on Deformation Gradients and Image Noises for Mining Deformation Monitoring". Remote Sensing 13, nr 15 (27.07.2021): 2958. http://dx.doi.org/10.3390/rs13152958.

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The offset-tracking method (OTM) utilizing SAR image intensity can detect large deformations, which makes up for the inability of interferometric synthetic aperture radar (InSAR) technology in large mining deformation monitoring, and has been widely used. Through lots of simulation experiments, it was found that the accuracy of OTM is associated with deformation gradients and image noises in the cross-correlation window (CCW), so CCW sizes should be selected reasonably according to deformation gradients and noise levels. Based on the above conclusions, this paper proposes an adaptive CCW selection method based on deformation gradients and image noises for mining deformation monitoring, and this method considers influences of deformation gradients and image noises on deformations to select adaptive CCWs. In consideration of noise influences on offset-tracking results, smaller CCWs are selected for large deformation gradient areas, and larger CCWs are selected for small deformation gradient areas. For some special areas, special CCWs are selected for offset-tracking. The proposed method is implemented to simulation and real experiments, and the experiment results demonstrate that the proposed method with high reliability and effectiveness can significantly improve the accuracy of OTM in mining deformation monitoring.

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7

LIU, S. J., H. WANG i H. ZHANG. "SMOOTHED FINITE ELEMENTS LARGE DEFORMATION ANALYSIS". International Journal of Computational Methods 07, nr 03 (wrzesień 2010): 513–24. http://dx.doi.org/10.1142/s0219876210002246.

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The smoothed finite element method (SFEM) was developed in order to eliminate certain shortcomings of the finite element method (FEM). SFEM enjoys some of the flexibilities of meshfree methods. One advantage of SFEM is its applicability to modeling large deformations. Due to the absence of volume integration and parametric mapping, issues such as negative volumes and singular Jacobi matrix do not occur. However, despite these advantages, SFEM has never been applied to problems with extreme large deformation. For the first time, we apply SFEM to extreme large deformations. For two numerical problems, we demonstrate the advantages of SFEM over FEM. We also show that SFEM can compete with the flexibility of meshfree methods.

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8

Wang, Ren Zuo, Shih Hung Chen, Chao Hsun Huang, Bing Chang Lin i Chung Yue Wang. "Large Deformation Analysis of Buried Pipeline". Applied Mechanics and Materials 405-408 (wrzesień 2013): 759–62. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.759.

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In this paper, a set of the procedures of the numerical simulation for the buried pipeline is proposed. These numerical procedures are used to compute the large deformations of the buried pipeline through the fault. In order to simulate the fault slip, displacement control is adopted. The geometric and material nonlinearity of buried pipe are considered. The beam elements are used to calculate the buckling deformation of the pipe. The ASCE (1984) soil spring models (SSM) are used to model the interaction of deformation of the soil and the buried pipe. In order to confirm rationality of numerical results using SSM, comparison between experiment result in Cornell University (CU) [5], Trautmann and ORourke experiment results [7] and SSM numerical results are studied. Two examples demonstrate the accuracy of the proposed procedures.

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9

Ostertag, Oskar, Eva Ostertagová i Ladislav Novotný. "Analytical and Numerical Solution of Large Actuator Deformation". Applied Mechanics and Materials 816 (listopad 2015): 96–102. http://dx.doi.org/10.4028/www.scientific.net/amm.816.96.

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This paper deals with the possibility of controlled deformation of the actuator of a flexible system. In the solution, large deformations of the actuator have been assumed. The model was made of a material capable of large deformations caused by internal pressure. The internal pressure was let into the cavities located in the actuator. The solution was realized analytically and numerically. The results show the relevance of the stated proposal.

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10

Solomon, Sean C. "Earth deformation, writ large". Nature Geoscience 2, nr 10 (październik 2009): 679. http://dx.doi.org/10.1038/ngeo650.

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11

Bleher, Frauke M. "Large universal deformation rings". Proceedings of the American Mathematical Society 142, nr 9 (30.05.2014): 3039–47. http://dx.doi.org/10.1090/s0002-9939-2014-12104-6.

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12

Rückert, Jens, i Arnd Meyer. "Large deformation and plates". PAMM 12, nr 1 (grudzień 2012): 669–70. http://dx.doi.org/10.1002/pamm.201210323.

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13

Trajkovic-Milenkovic, Marina, i Otto Bruhns. "Numerical analysis of finite hypo-elastic cyclic deformation with large rotations". Facta universitatis - series: Architecture and Civil Engineering 17, nr 3 (2019): 299–313. http://dx.doi.org/10.2298/fuace190513006t.

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Constitutive relations which describe engineering materials behaviour during the finite elastoplastic deformations are usually presented in the form of rates of stresses and strains. One of the possible approaches in the constitutive relations formulation is the additive decomposition of the total deformation rate into its elastic part and its plastic part. The elastic deformation rate contributes to any elastoplastic deformation at any stage. Hence, its exact and well-considered formulation is of particular importance and it has to be properly predicted by the corresponding material law. This is of great importance in particular when deformation cyclic processes are considered, in which case small errors may accumulate, even if the total deformation is small. The implementation of the most frequently used corotational rates, i.e. the Jaumann rate and the Green-Naghdi rate, in the hypo-elastic constitutive relations regarding small and moderate rotations gives accurate results for low number of repeated deformation cycles. With increased number of cycles, however, the implementation of these rates results in different and physically non-admissible material responses. This instability in results is particularly observable during the cyclic deformations with large rotations, which is the main subject of this work. In contrast to the aforementioned objective rates, the results of the logarithmic rate implementation into the hypo-elastic constitutive relations for the case of pure elastic deformation describe a physically stable process.

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14

Trimulyono, Andi, i Ardhana Wicaksono. "Simulasi numerik large-deformation surface wave dengan smoothed particle hydrodynamics". Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan 15, nr 3 (14.02.2019): 102–6. http://dx.doi.org/10.14710/kapal.v15i3.21535.

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15

Begun, A. S., A. A. Burenin i L. V. Kovtanyuk. "LARGE DEFORMATIONS AND HEATING OF ELASTOVISCOPLASTIC MATERIAL IN A CYLINDRICAL VISCOMETER". Mechanics of Solids 57, nr 3 (czerwiec 2022): 532–42. http://dx.doi.org/10.3103/s0025654422030062.

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Abstract A solution for a coupled thermomechanical boundary value problem of the theory of large deformations that simultaneously takes into account the intense deformation of an elastoviscoplastic material and its heating due to such deformation and near-wall friction is constructed. The conditions for the emergence and development of a viscoplastic flow in the material of a cylindrical layer enclosed between rigid surfaces, one of which has the ability to rotate under the action of a changing given load relative to the axis of the viscometer, are calculated. At all stages of the process from its start to stop, the stress-strain state and temperature distributions in the areas of flow and reversible deformation are calculated, including flow stop, unloading and cooling, with the calculation of residual stresses and deformations. The yield strength is assumed to be temperature dependent.

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16

le Joncour, Lea, Benoit Panicaud, Andrzej Baczmanski, Manuel François, Chedly Braham i Anna Maria Paradowska. "Large Deformation and Mechanical Effects of Damage in Aged Duplex Stainless Steel". Materials Science Forum 652 (maj 2010): 155–60. http://dx.doi.org/10.4028/www.scientific.net/msf.652.155.

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The lattice strains in large tensile deformations, up to the fracture of the sample were measured using neutron TOF method. For the first time, the range of large deformation was studied measuring lattice strain in the deformation neck and using special correction for macrostress value. It was found that during large plastic deformation the lattice stresses arise almost linearly with the macrostress value. The relaxation of elastic strains in some groups of ferritic grains (corresponding to reflections 211 and 200) can be connected with initiation of damage process in the ferritic phase.

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17

Gurao, N. P., i Satyam Suwas. "Deformation mechanisms during large strain deformation of nanocrystalline nickel". Applied Physics Letters 94, nr 19 (11.05.2009): 191902. http://dx.doi.org/10.1063/1.3132085.

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18

Glimm, James G., Bradley J. Plohr i David H. Sharp. "Conservative Formulation of Large Deformation Plasticity". Applied Mechanics Reviews 46, nr 12 (1.12.1993): 519–26. http://dx.doi.org/10.1115/1.3120313.

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We explain several ideas which may, either singly or in combination, help achieve high resolution in simulations of large-deformation plasticity. Because of the large deformations, we work in the Eulerian picture. The governing equations are written in a fully conservative form, which are correct for discontinuous as well as continuous solutions. Models of shear bands are discussed. These models describe the internal dynamics of a developed shear band in terms of time-asymptotic states; in other words, the smooth internal structure is replaced by a jump discontinuity, and the shear band evolution is determined by jump relations. This analysis is useful for high resolution numerical methods, including both shock capturing and shock tracking schemes, as well as for the understanding and validation of computations, independently of the underlying method. Preliminary computations, which illustrate the feasibility of these ideas, are presented.

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19

Wang, Jie, Dongxu Li i Jianping Jiang. "Thermally induced deformation of ultra-large truss support membrane structure". Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 231, nr 13 (14.09.2016): 2502–12. http://dx.doi.org/10.1177/0954410016667145.

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Large space structures experience changing thermal environment during orbiting the earth. The resultant temperature gradients induce structural deformations that may downgrade performance of payloads conducting high precision missions and even affect stability of the spacecraft. So, it is extremely important to analyze thermally induced deformation of large space structures for routine operation. In this paper, the ultra-large truss support membrane structure on satellite is characterized and studied. The methodology of thermal quasi-static deformation is formulated and the procedure of thermo-structural analysis is proposed. The thermostructural analysis model with hollow tubes is developed based on finite difference method and finite element method. With heat fluxes from solar radiation, earth radiation, and earth albedo radiation being considered, the temperature distribution filed is obtained from the thermal analysis and then applied to the structural analysis model to calculate quasi-static deformations and root mean square errors with orbital angles. Results show that temperature gradients along circumferential direction of tubes can induce prominent shape error. The proposed method is useful for predicting thermally induced deformation of large space structures and valuable for designing active control systems to compensate for disturbances.

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20

Barbič, Jernej, i Yili Zhao. "Real-time large-deformation substructuring". ACM Transactions on Graphics 30, nr 4 (lipiec 2011): 1–8. http://dx.doi.org/10.1145/2010324.1964986.

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21

Panoskaltsis, Vassilis, Lazaros Polymenakos i Dimitris Soldatos. "On large deformation generalized plasticity". Journal of Mechanics of Materials and Structures 3, nr 3 (1.05.2008): 441–57. http://dx.doi.org/10.2140/jomms.2008.3.441.

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22

Levin, V. A. "Repeatedly superimposed large elastic deformation". International Journal of Fracture 79, nr 1 (1996): R11—R15. http://dx.doi.org/10.1007/bf00017717.

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23

Ha, In Young, Matthias Wilms i Mattias Heinrich. "Semantically Guided Large Deformation Estimation with Deep Networks". Sensors 20, nr 5 (4.03.2020): 1392. http://dx.doi.org/10.3390/s20051392.

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Deformable image registration is still a challenge when the considered images have strong variations in appearance and large initial misalignment. A huge performance gap currently remains for fast-moving regions in videos or strong deformations of natural objects. We present a new semantically guided and two-step deep deformation network that is particularly well suited for the estimation of large deformations. We combine a U-Net architecture that is weakly supervised with segmentation information to extract semantically meaningful features with multiple stages of nonrigid spatial transformer networks parameterized with low-dimensional B-spline deformations. Combining alignment loss and semantic loss functions together with a regularization penalty to obtain smooth and plausible deformations, we achieve superior results in terms of alignment quality compared to previous approaches that have only considered a label-driven alignment loss. Our network model advances the state of the art for inter-subject face part alignment and motion tracking in medical cardiac magnetic resonance imaging (MRI) sequences in comparison to the FlowNet and Label-Reg, two recent deep-learning registration frameworks. The models are compact, very fast in inference, and demonstrate clear potential for a variety of challenging tracking and/or alignment tasks in computer vision and medical image analysis.

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24

Hussein, Bassam A., Hiroyuki Sugiyama i Ahmed A. Shabana. "Coupled Deformation Modes in the Large Deformation Finite-Element Analysis: Problem Definition". Journal of Computational and Nonlinear Dynamics 2, nr 2 (17.11.2006): 146–54. http://dx.doi.org/10.1115/1.2447353.

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In the classical formulations of beam problems, the beam cross section is assumed to remain rigid when the beam deforms. In Euler–Bernoulli beam theory, the rigid cross section remains perpendicular to the beam centerline; while in the more general Timoshenko beam theory the rigid cross section is permitted to rotate due to the shear deformation, and as a result, the cross section can have an arbitrary rotation with respect to the beam centerline. In more general beam models as the ones based on the absolute nodal coordinate formulation (ANCF), the cross section is allowed to deform and it is no longer treated as a rigid surface. These more general models lead to new geometric terms that do not appear in the classical formulations of beams. Some of these geometric terms are the result of the coupling between the deformation of the cross section and other modes of deformations such as bending and they lead to a new set of modes referred to in this paper as the ANCF-coupled deformation modes. The effect of the ANCF-coupled deformation modes can be significant in the case of very flexible structures. In this investigation, three different large deformation dynamic beam models are discussed and compared in order to investigate the effect of the ANCF-coupled deformation modes. The three methods differ in the way the beam elastic forces are calculated. The first method is based on a general continuum mechanics approach that leads to a model that includes the ANCF-coupled deformation modes; while the second method is based on the elastic line approach that systematically eliminates these modes. The ANCF-coupled deformation modes eliminated in the elastic line approach are identified and the effect of such deformation modes on the efficiency and accuracy of the numerical solution is discussed. The third large deformation beam model discussed in this investigation is based on the Hellinger–Reissner principle that can be used to eliminate the shear locking encountered in some beam models. Numerical examples are presented in order to demonstrate the use and compare the results of the three different beam formulations. It is shown that while the effect of the ANCF-coupled deformation modes is not significant in very stiff and moderately stiff structures, the effect of these modes can not be neglected in the case of very flexible structures.

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25

He, Jiandong, Chong Wu i Yining Jia. "A GPU-Accelerated 3D Mesh Deformation Method Based on Radial Basis Function Interpolation". Mathematical Problems in Engineering 2022 (13.10.2022): 1–8. http://dx.doi.org/10.1155/2022/6018008.

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In this paper, we developed a GPU parallelized 3D mesh deformation based on the radial basis function (RBF) interpolation using NVIDIA CUDA C++. The RBF mesh deformation method interpolates displacements of the boundary nodes to the whole mesh, which can handle large mesh deformations caused by translations, rotations, and deformations. However, the computational performance of RBF mesh deformation depends on the quantity of grids. For 3D mesh deformation, especially for mesh with large number of boundary nodes, RBF interpolation has been verified computationally intensive. By introducing GPU acceleration, the computational performance of RBF mesh deformation code improved significantly. Several benchmark test cases were carried out to show the feasibility and efficiency of GPU parallelization. In summary, the GPU parallelized RBF interpolation shows the potential to become an alternative way to deal with 3D mesh deformation problems in an efficient way.

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26

Zhang, Qing Ping, i Zhi Geng Fan. "Large Deformations of Low Density Open-Cell Elastomeric Foams: Kelvin Model Study". Applied Mechanics and Materials 117-119 (październik 2011): 550–55. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.550.

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Based on Kelvin model, the large deformations of elastomeric foams were simulated by finite element method (FEM). Numerical results indicated that edge bending, edge stretching and edge torsion were important deformation mechanisms of low density open-cell Kelvin foam. The hyperelasticity of the cell material had little effect on the macro-mechanical properties of the foam at low strain in [111] direction and finite compressive strain in [100] direction when edge bending was the main deformation mechanism of the foams. With the increase of the uniaxial tensile strain, edge stretching played notable roles, which resulted in that the hyperelasticity of the solid had significantly influence on the deformation of the foam at large uniaxial tensile strain. And the high strain compressive stress-strain curves in the [111] direction based on the hyperelastic relation differed from the linear elastic results remarkably as edge torsion was an important deformation mechanism of the foam.

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27

Dolzhenko, Anastasiia, Marina Tikhonova, Rustam Kaibyshev i Andrey Belyakov. "Microstructures and Mechanical Properties of Steels and Alloys Subjected to Large-Strain Cold-to-Warm Deformation". Metals 12, nr 3 (8.03.2022): 454. http://dx.doi.org/10.3390/met12030454.

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The effect of large-strain cold-to-warm deformation on the microstructures and mechanical properties of various steels and alloys is critically reviewed. The review is mainly focused on the microstructure evolution, whereas the deformation textures are cursorily considered without detailed examination. The deformation microstructures are considered in a wide strain range, from early straining to severe deformations. Such an approach offers a clearer view of how the deformation mechanisms affect the structural changes leading to the final microstructures evolved in large strains. The general regularities of microstructure evolution are shown for different deformation methods, including conventional rolling/swaging and special techniques, such as equal channel angular pressing or torsion under high pressure. The microstructural changes during deformations under different processing conditions are considered as functions of total strain. Then, some important mutual relationships between the microstructural parameters, e.g., grain size vs. dislocation density, are revealed and discussed. Particular attention is paid to the mechanisms of microstructure evolution that are responsible for the grain refinement. The development of an ultrafine-grained microstructure during large strain deformation is considered in terms of continuous dynamic recrystallization. The regularities of the latter are discussed in comparison with conventional (discontinuous) dynamic recrystallization and grain subdivision (fragmentation) phenomenon. The structure–property relations are quantitatively represented for the structural strengthening, taking into account various mechanisms of dislocation retardation.

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28

Diao, Xinpeng, Quanshuai Sun, Jing Yang, Kan Wu i Xin Lu. "A Novel Deformation Extraction Approach for Sub-Band InSAR and Its Application in Large-Scale Surface Mining Subsidence Monitoring". Sustainability 15, nr 1 (26.12.2022): 354. http://dx.doi.org/10.3390/su15010354.

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Differential synthetic aperture radar interferometry (InSAR) is widely used to monitor ground surface deformation due to its wide coverage and high accuracy. However, the large-scale and rapid deformation that occurs in mining areas often leads to densely spaced interference fringes, thus, severely limiting the applicability of D-InSAR in mining subsidence monitoring. Sub-band InSAR can reduce phase gradients in interferograms by increasing the simulated wavelength, thereby characterising large-scale surface deformations. Nonetheless, accurate registration between non-overlapping sub-band images with conventional sub-band InSAR is challenging. Therefore, our study proposed a new sub-band InSAR deformation extraction method, based on raw full-bandwidth single-look complex image pair registration data to facilitate sub-band interferometric processing. Simulations under noiseless conditions demonstrated that the maximum difference between the sub-band InSAR-monitored results and real surface deformations was 26 mm (1.86% of maximum vertical deformation), which theoretically meets the requirements for mining subsidence monitoring. However, when modelling dynamic deformation with noise, the sub-band InSAR-simulated wavelength could not be optimised for surface deformation due to the limitation in current SAR satellite bandwidths, which resulted in significantly noisy and undistinguishable interference fringes. Nonetheless, this method could still be advantageous in high-coherence regions where surface deformation exceeds 1/5th of the simulated wavelength.

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29

Fetisov, V. Р. "Structural aspects of deformation hardening with repeated drawing low carbon wire". Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), nr 2 (31.05.2022): 44–49. http://dx.doi.org/10.21122/1683-6065-2022-2-44-49.

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While repeated drawing of low carbon wire, a decrease in the grain size of ferrite reduces the parameters of deformation hardening in the initial field of deformations with parabolic hardening and increases in the field of substructural hardening with large and extra‑large total compressions. The transition from large to super‑large total deformations goes along with the development of dynamic return processes that reduce the rate of deformation hardening. Preliminary thermal softening of cold‑formed wire increases the strength gain during subsequent drawing and can be used to increase the total compression of the wire rod before intermediate heat treatment.

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30

Hao, Yang, Chunhui Liu, Yu Wu, Hai Pu, Kai Zhang i Lingling Shen. "Analysis of Stress and Deformation on Surrounding Rock Mass of a Trapezoidal Roadway in a Large Inclination Coal Seam and Novel High Yielding Prop Support: A Case Study". Mathematics 11, nr 2 (7.01.2023): 319. http://dx.doi.org/10.3390/math11020319.

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Trapezoidal roadways in large inclination coal seams show asymmetrical tectonic characteristics, while there is still a lack of theoretical results on stress, deformation, and efficient and effective supporting methods on high walls. In this paper, based on the geological characteristics of a large, inclined coal seam roadway, a mechanical model for stress–deformation analysis of trapezoidal section roadway was established. Complex analysis and a comfort map were employed to investigate the stress and deformation distribution on the roadway surface, and a novel yielding prop with high load capacity and constant working resistance was employed to support a high wall side based on analytical results. The results are as follows: (1) The deformation of the high wall is larger than that of the low wall, and the deformation of the roof is larger than that of the floor. The overall deformation of the surrounding rock shows that the rib closure is larger than the roof-to-floor closure. (2) The stress of the surrounding rock shows that both horizontal and vertical stresses are highest in the upper corner, indicating that the broken zone is most likely to occur at this location. (3) A new support employed with a high-yielding prop and a high-strength cable in a large, inclined angle roadway is proposed. On-site experiments were conducted in a large 5-1081 roadway of a coal mine in Shanxi, China. Under the influence of mining disturbance, the deformations at the top corner decreased by 40% compared with before. The test results show that the new support scheme can effectively control the development of roadway deformation and damage during the mining process. The new support also shows friendly environmental support and fast installation.

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31

Pan, Peng, Yu Zhang, Shi Yan Song i Lie Ping Ye. "Factors Influencing Maximum and Residual Deformations of SDOF Systems Subjected to Large Ground Motions". Advanced Materials Research 243-249 (maj 2011): 170–77. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.170.

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The maximum and residual deformations of structures subjected to strong ground motions are the most importance indexes, particularly under the performance-based design framework, thus understanding the influencing factors is of great importance to seismic design. In this study, single degree of freedom (SDOF) systems with varying structural properties are analyzed using a series of strong ground motions from FEM/SAC project. The influences of three structural parameters, i.e., yield force, second stiffness after yielding, and stiffness degradation, on the maximum and residual deformations are investigated based on the statistics of the analysis results. The analysis results suggest the follows: (1) larger yield forces lead to smaller residual and maximum deformations for short period structures, and they lead to smaller residual deformations but no necessarily smaller maximum deformation for intermediate and long period structures; (2) larger second stiffness lead to smaller residual and maximum deformations for short period structures, and they lead to smaller residual deformations but no necessarily smaller maximum deformation for intermediate and long period structures; (3) smaller stiffness degradation index leads to smaller maximum deformations but larger residual deformations.

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32

Du, Xin. "Modal Analysis and Design on the Base Plate of Large-Scale Linear Vibration Screen". Applied Mechanics and Materials 155-156 (luty 2012): 514–18. http://dx.doi.org/10.4028/www.scientific.net/amm.155-156.514.

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Large-scale vibration screen produced modal deformation under the influence of their quality. They often leaded to destruction in the linear vibration screen. This damage often occurred in side plates and screen boxes. Because rivets connected the side plate, it was individually analyzed. There were large deformation of linear vibration screen ZX3175 by computer software COSMOSWorks. The nature frequency of the screen plate was close to the screen source. There were large modal deformations at the edge of the plate. This was the main reason for fatigue damage of the plate. This paper put forward some methods to reduce modal deformation of the base plate.

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Hori, Akio, i Akira Sasagawa. "Large Deformation of Inelastic Large Space Frame. I: Analysis". Journal of Structural Engineering 126, nr 5 (maj 2000): 580–88. http://dx.doi.org/10.1061/(asce)0733-9445(2000)126:5(580).

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Hori, Akio, i Akira Sasagawa. "Large Deformation of Inelastic Large Space Frame. II: Application". Journal of Structural Engineering 126, nr 5 (maj 2000): 589–95. http://dx.doi.org/10.1061/(asce)0733-9445(2000)126:5(589).

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Nakajima, N., i E. R. Harrell. "Large shear deformation and estimation of deformational memory for polyethylacrylate rubbers". Journal of Macromolecular Science, Part B 35, nr 2 (kwiecień 1996): 215–28. http://dx.doi.org/10.1080/00222349608212382.

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Fang, Qiang, Weidong Chen, Anan Zhao, Changxi Deng i Shaohua Fei. "Control system designing for correcting wing–fuselage assembly deformation of a large aircraft". Assembly Automation 37, nr 1 (6.02.2017): 22–33. http://dx.doi.org/10.1108/aa-01-2016-006.

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Purpose In aircraft wing–fuselage assembly, the distributed multi-point support layout of positioners causes fuselage to deform under gravity load, leading to assembly difficulty and assembly stress. This paper aims to propose a hybrid force position control method to balance aerodynamic shape accuracy and deformation of assembly area, thereby correcting assembly deformation and reducing assembly stress. Design/methodology/approach Force and position control axes of positioners are selected based on screw theory and ellipsoid method. The position-control axes follow the posture trajectory to align the fuselage posture. To exert force on the fuselage and correct the deformations, the force-control axes follow the contact force derived by using orthogonal experiments and partial least squares regression (PLSR). Finite element simulation and one-dimension deformation correction experiment are conducted to verify the validity of this method. Findings Simulation results indicate that hybrid force position control method can correct assembly deformation and improve the wing–fuselage assembly quality significantly. Experiment on specimen verifies the effect of this method indirectly. Originality/value The proposed method gives a solution to solve the deformation problem during aircraft wing-fuselage assembly, thereby reducing assembly stress and improving assembly quality.

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Wu, C. L., Z. R. Wang i Wen Zhang. "Research of Formation Mechanics on Nanostructured Chips by Multi-Deformations Based on Finite Element Method". Advanced Materials Research 989-994 (lipiec 2014): 352–55. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.352.

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Formation of chip is a typical severe plastic deformation progress in machining which is only single deformation stage. The rake angle of tool is governing parameter to create large strain imposed in the chip. Effect of rake angle and deformation times on effective strain, mean strain, strain variety and strain rate imposed in the chip are researched respectively. The result of simulation have shown that the chip with large strain and better uniform of strain along the longitudinal section of chip can be produced with negative rake angle at some lower cutting velocity by multi-deformations in large strain machining.

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Yoshioka, Shin'ya. "Large Deformation Mechanism of Glassy Polymers." Nihon Reoroji Gakkaishi 30, nr 5 (2002): 253–57. http://dx.doi.org/10.1678/rheology.30.253.

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KATOH, M., T. AKASAKA i A. OKUBO. "Large deformation of CFRP elliptic ring." Journal of the Japan Society for Composite Materials 17, nr 1 (1991): 38–42. http://dx.doi.org/10.6089/jscm.17.38.

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HASHIGUCI, Koichi. "Large elastoplastic deformation theory for soils". Journal of applied mechanics 6 (2003): 521–30. http://dx.doi.org/10.2208/journalam.6.521.

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Xu, Bo Hao, Shuai Wang, Kai Fa Zhou, Wen Yi Ma i Nan Sun. "Large Torsion Deformation: Centrosymmetric Reentrant Honeycomb". Applied Mechanics and Materials 904 (4.01.2022): 17–25. http://dx.doi.org/10.4028/www.scientific.net/amm.904.17.

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There exist some problems in the crash box and anti-collision beam sandwich structure, such as monotone deformation pattern and uneconomical energy absorption performance. In order to raise the deformation capacity and energy absorption performance of sandwich structure, centrosymmetric reentrant honeycomb (CRH) and hexagonal centrosymmetric reentrant honeycomb (HCRH) are proposed based on auxetic reentrant honeycomb (ARH) in this work. Based on HCRH, four kinds of transverse combination structures and two kinds of longitudinal combination structures are obtained. The results of specific energy absorption show that the energy absorption capacity of the angular contact homodromous combination structure (ACOC) is about 3 times that of the other three transverse combination structures. Compared with longitudinal heterodromous combination structure (LHEC), the energy absorption capacity of longitudinal homodromous combination structure (LHOC) is improved by 72.7%.

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Karimi, Mina, Mehrdad Massoudi, Noel Walkington, Matteo Pozzi i Kaushik Dayal. "Energetic formulation of large‐deformation poroelasticity". International Journal for Numerical and Analytical Methods in Geomechanics 46, nr 5 (10.01.2022): 910–32. http://dx.doi.org/10.1002/nag.3326.

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Zhang, Su Min, i Yong Quan Zhu. "Management Criterion for Large Deformation Tunnels". Applied Mechanics and Materials 204-208 (październik 2012): 1468–71. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.1468.

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The limit displacement was calculated with regard to a large deflection tunnel. The continuum calculation model was established with actual parameters of the surrounding rock of the tunnel as input. In the simulation calculation, the action occasion of the support structure was determined based on the ratio of the measured rock pressure to the geo-stress, and the bearing capacity of the R.C. compressive bending component of the support was expressed with the axial force and bending moment on losing capacity of the support structure in loading; The limit displacement of the tunnel wais determined finally combined with the measured displacement of control points on collapsed or gauge-intrusive sections and cracked primary support or secondary lining sections. Since the deforming rate is more concerned than the displacement in drill and blast tunnel construction, three-level-management of deflection and deforming rate was proposed based on the statistical analysis of measured deforming rate, and the safety requirement for deflection control in construction. The management criterion has reference value to other similar tunnels where difficulty is encountered due to large deflection occurring in construction.

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KAWAI, Masamichi. "On strain hardening in large deformation." Transactions of the Japan Society of Mechanical Engineers Series A 56, nr 522 (1990): 346–51. http://dx.doi.org/10.1299/kikaia.56.346.

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Khan, Ali R., Lei Wang i Mirza Faisal Beg. "Multistructure Large Deformation Diffeomorphic Brain Registration". IEEE Transactions on Biomedical Engineering 60, nr 2 (luty 2013): 544–53. http://dx.doi.org/10.1109/tbme.2012.2230262.

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Potluri, P., J. Atkinson i I. Porat. "Large Deformation Modelling of Flexible Materials". Journal of the Textile Institute 87, nr 1 (styczeń 1996): 129–51. http://dx.doi.org/10.1080/00405009608659062.

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MAEDA, Kazuhisa, Shigenobu OKAZAWA, Kenji NAKAO i Kouji NISHIGUCHI. "102 Large Deformation Analysis of Adhisive". Proceedings of The Computational Mechanics Conference 2008.21 (2008): 99–100. http://dx.doi.org/10.1299/jsmecmd.2008.21.99.

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Wei, Guangtao, Cong Zhang i Linzhi Wu. "Large deformation of sandwich wide panel". Composite Structures 301 (grudzień 2022): 116208. http://dx.doi.org/10.1016/j.compstruct.2022.116208.

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Ohga, Mitao, i Tsunemi Shigematsu. "Large Deformation Dynamic Analysis of Plates". Journal of Engineering Mechanics 114, nr 4 (listopad 1988): 624–37. http://dx.doi.org/10.1061/(asce)0733-9399(1988)114:4(624).

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SAKAI, Yuzuru, Tetsuya Okamoto i Akihiko Yamashita. "Large Deformation Analysis by SPH Method". Proceedings of The Computational Mechanics Conference 2004.17 (2004): 765–66. http://dx.doi.org/10.1299/jsmecmd.2004.17.765.

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