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Journal articles on the topic 'Elasto-plastic systems'

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Published: 14 March 2023

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1

Leung, A. Y. T., and T. C. Fung. "Analytical solutions of elasto-plastic systems." Journal of Sound and Vibration 142, no. 1 (October 1990): 175–82. http://dx.doi.org/10.1016/0022-460x(90)90590-v.

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2

Pal, Raj Kumar, Amnaya P. Awasthi, and Philippe H. Geubelle. "Wave propagation in elasto-plastic granular systems." Granular Matter 15, no. 6 (October 2, 2013): 747–58. http://dx.doi.org/10.1007/s10035-013-0449-1.

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3

Au, S. K. "Critical excitation of sdof elasto-plastic systems." Journal of Sound and Vibration 296, no. 4-5 (October 2006): 714–33. http://dx.doi.org/10.1016/j.jsv.2006.01.034.

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4

Wang, Pao‐Hsii, and Min‐Jong Wang. "Elasto‐plastic large displacement analysis of cable systems." Journal of the Chinese Institute of Engineers 9, no. 5 (July 1986): 451–64. http://dx.doi.org/10.1080/02533839.1986.9676913.

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5

Au, Siu-Kui. "Sub-critical excitations of SDOF elasto-plastic systems." International Journal of Non-Linear Mechanics 41, no. 9 (November 2006): 1095–108. http://dx.doi.org/10.1016/j.ijnonlinmec.2006.11.005.

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6

Hayward, V., B. S. R. Armstrong, F. Altpeter, and P. E. Dupont. "Discrete-Time Elasto-Plastic Friction Estimation." IEEE Transactions on Control Systems Technology 17, no. 3 (May 2009): 688–96. http://dx.doi.org/10.1109/tcst.2008.2001710.

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7

Elgamal, Ahmed-W. "Shear hysteretic elasto-plastic earthquake response of soil systems." Earthquake Engineering & Structural Dynamics 20, no. 4 (1991): 371–87. http://dx.doi.org/10.1002/eqe.4290200406.

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8

Di Egidio, Angelo, Stefano Pagliaro, and Alessandro Contento. "Elasto-Plastic Short Exoskeleton to Improve the Dynamic and Seismic Performance of Frame Structures." Applied Sciences 12, no. 20 (October 15, 2022): 10398. http://dx.doi.org/10.3390/app122010398.

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The coupling with external mechanical systems such as oscillating masses working as tuned mass dampers, dynamic mass absorbers, elasto-plastic dampers, and rigid walls is an effective method to reduce the displacements and drifts of structures under external loads. An alternative method is provided by the coupling of the structure with an independent, auxiliary elasto-plastic system. This paper investigates the dynamic and seismic behaviour of a structure rigidly coupled with an auxiliary yielding mechanical system under harmonic and seismic ground excitation. A two-degree-of-freedom model is used to describe the dynamic and seismic behaviour of the main structure rigidly coupled to the yielding system, which is described by a one-degree-of-freedom model. The auxiliary system has an elasto-plastic constitutive behaviour that is modelled by a Bouc-Wen model. The equations of motion of the coupled system are obtained by a direct approach. The coupling with the yielding system is considered beneficial if the displacements of the coupled system reduce with respect to those of the stand-alone frame structure. An extensive parametric analysis is performed to point out the role of the mechanical parameters that describe the elasto-plastic constitutive behaviour of the auxiliary system. Results reveal that in large ranges of the parameters’ values, the coupling with the elasto-plastic system improves the performance of the frame structure.
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9

Terazawa, Yuki, and Toru Takeuchi. "Generalized Response Spectrum Analysis for Structures with Dampers." Earthquake Spectra 34, no. 3 (August 2018): 1459–79. http://dx.doi.org/10.1193/092217eqs188m.

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In this study, a computational seismic design routine is proposed based on a generalized response spectrum analysis for highly indeterminate structures with energy-dissipation members, such as viscous or elasto-plastic dampers. Complex stiffness terms are introduced to account for displacement-dependent damping, and a three-dimensional (3-D) element stiffness matrix with complex axial stiffness is proposed for elasto-plastic dampers. A modified complete quadratic combination method previously developed for real symmetric damped systems is extended to complex asymmetric damped systems, based on a theoretical analysis of eigenvalue equations. The response is evaluated by iteratively conducting complex eigenvalue analysis and modal combination. The accuracy is confirmed through comparison to nonlinear response history analysis of 2-D frame models. Finally, an example application is presented of a 3-D truss tower seismically retrofitted by replacing the braces with viscoelastic and then elasto-plastic dampers. The proposed design routine is used to rapidly identify novel and efficient damper arrangements and sizing distributions, avoiding computationally intensive nonlinear response history analysis.
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10

Ambrosio, Jorge A. C., and Parviz E. Nikravesh. "Elasto-plastic deformations in multibody dynamics." Nonlinear Dynamics 3, no. 2 (1992): 85–104. http://dx.doi.org/10.1007/bf00118987.

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11

WATANABE, Hiroshi, Toshiaki HISADA, Tetsundo NAKATOGAWA, Koichiro OKETANI, and Nobuyoshi IRIKI. "Ratchet Analysis of Piping Systems by Dynamic Elasto-Plastic FEM." Transactions of the Japan Society of Mechanical Engineers Series A 64, no. 627 (1998): 2710–17. http://dx.doi.org/10.1299/kikaia.64.2710.

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12

Wang, Kesheng, and O. Bjørke. "Mechanical Networks Model for Analysis of Elasto-Plastic Truss Systems." IFAC Proceedings Volumes 25, no. 18 (August 1992): 327–34. http://dx.doi.org/10.1016/s1474-6670(17)49992-7.

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13

Chang, Seongkyu, and Sung Gook Cho. "An Intelligent Process to Estimate the Nonlinear Behaviors of an Elasto-Plastic Steel Coil Damper Using Artificial Neural Networks." Actuators 11, no. 1 (December 31, 2021): 9. http://dx.doi.org/10.3390/act11010009.

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This study developed a nonlinear behavior prediction model for elasto-plastic steel coil dampers (SCDs) using artificial neural networks (ANN). To train the ANN, first, the input and output data of the behavior of the elasto-plastic SCD was prepared. This study utilized the design parameters and load–displacement curves of the SCD to train the ANN. The elasto-plastic load–displacement curve of the SCD was obtained from simulation results using an ANSYS workbench. The design parameters (wire diameter, internal diameter, number of active windings, yield strength) of the SCD were defined as the input patterns, while the yield deformation, first stiffness, and second stiffness were output patterns. During learning of the neural network model, 60 datasets of the SCD were used as the learning pattern, and the remaining 21 were used to verify the model. Although this study used a small number of learning patterns, the ANN predicted accurate results for yield displacement, first stiffness, and second stiffness. In this study, the ANN was found to perform very well, predicting the nonlinear response of the SCD, compared with the values obtained from a finite element analysis program.
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14

HAGIWARA, Nobuyuki, Hiroshi OHMORI, and Tetsuya MATSUI. "DYNAMIC BEHAVIOR AND STABILITY OF ELASTO-PLASTIC SYSTEMS WITH GEOMETRICAL NONLINEARITY." Journal of Structural and Construction Engineering (Transactions of AIJ) 61, no. 488 (1996): 77–86. http://dx.doi.org/10.3130/aijs.61.77_3.

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15

Fujita, Katsuhisa, Tetsuya Kimura, and Yoshikazu Ohe. "Seismic Response Analysis of Piping Systems With Nonlinear Supports Using Differential Algebraic Equations." Journal of Pressure Vessel Technology 126, no. 1 (February 1, 2004): 91–97. http://dx.doi.org/10.1115/1.1634589.

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Hysteresis elements such as elasto-plastic dampers are important elements for mechanical structures, especially for earthquake-proof structures. When such nonlinear supports are utilized for piping systems, the nonlinearities of the hysteresis elements and the geometrical complexity of the piping systems lead to complicated seismic responses, and thus further studies are required in order to enhance the reliability of the earthquake-proof design. In the seismic response analysis, the method of time history response analysis is widely used. In this paper, a method of nonlinear seismic response analysis for a piping systems using a combination of the FEM and the Differential Algebraic Equations (DAE) is proposed. As it is well known, the DAE is suitable for numerical analysis of time history responses for mechanical structures and machinery elements. According to the advantage of the DAE, the numerical modeling and simulation of a complex piping systems supported by the hysteresis elements can be easily carried out by using the proposed method. In order to verify the usefulness of the method, the time history responses of piping systems supported by a elasto-plastic damper is examined for seismic excitation by using the proposed method. The damper is modeled as a bilinear model. The effects of the second stiffness and the stiffness associated with the plastic deformation of the damper on the seismic responses are investigated using an actually recorded earthquake motion.
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16

Au, Siu-Kui. "Importance sampling for elasto-plastic systems using adapted process with deterministic control." International Journal of Non-Linear Mechanics 44, no. 2 (March 2009): 190–99. http://dx.doi.org/10.1016/j.ijnonlinmec.2008.11.010.

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17

Kaliszky, S., and J. Lógó. "Optimal strengthening of elasto-plastic trusses with plastic deformation and stability constraints." Structural Optimization 18, no. 4 (December 1999): 296–99. http://dx.doi.org/10.1007/bf01223313.

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18

Kim, Kyung-Suk, and Junglhl Kim. "Elasto-Plastic Analysis of the Peel Test for Thin Film Adhesion." Journal of Engineering Materials and Technology 110, no. 3 (July 1, 1988): 266–73. http://dx.doi.org/10.1115/1.3226047.

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Analyses have been made to extract the objective interfacial fracture toughness from the peel strength of very thin metallic films. An elastoplastic bending model of the adherend film has been employed in the analyses applying the fracture mechanics concept of steady-state interfacial crack growth. The analytic result finally shown is a universal peel diagram where the objective interfacial fracture toughness is readily readable when the peel strength is known. Experimental results for Cu films on Si and polyimide substrate systems with a Cr interface are also presented.
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19

ASANO, Koichiro, and Hajime NAKAGAWA. "SEISMIC RANDOM RESPONSE ANALYSIS OF ELASTO-PLASTIC SYSTEMS UNDER ACTIVE SATURATION CONTROL FORCE." Journal of Structural and Construction Engineering (Transactions of AIJ) 450 (1993): 49–57. http://dx.doi.org/10.3130/aijsx.450.0_49.

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20

Feng, Xiaodong, and Shaohua Guo. "Geometrical nonlinear elasto-plastic analysis of tensegrity systems via the co-rotational method." Mechanics Research Communications 79 (January 2017): 32–42. http://dx.doi.org/10.1016/j.mechrescom.2016.12.003.

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21

Nie, Jianguo, Muxuan Tao, C. S. Cai, and Ge Chen. "Modeling and investigation of elasto-plastic behavior of steel–concrete composite frame systems." Journal of Constructional Steel Research 67, no. 12 (December 2011): 1973–84. http://dx.doi.org/10.1016/j.jcsr.2011.06.016.

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22

Au, Siu-Kui. "First passage probability of elasto-plastic systems by importance sampling with adapted process." Probabilistic Engineering Mechanics 23, no. 2-3 (April 2008): 114–24. http://dx.doi.org/10.1016/j.probengmech.2007.12.005.

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23

D'Ambrisi, Angelo, and Marco Mezzi. "A probabilistic approach for estimating the seismic response of elasto-plastic SDOF systems." Earthquake Engineering & Structural Dynamics 34, no. 14 (2005): 1737–53. http://dx.doi.org/10.1002/eqe.509.

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24

Mukaddes, Abul Mukid Mohammad, Masao Ogino, Ryuji Shioya, and Hiroshi Kanayama. "Treatment of Block-Based Sparse Matrices in Domain Decomposition Method." International Journal of System Modeling and Simulation 2, no. 1 (March 30, 2017): 1. http://dx.doi.org/10.24178/ijsms.2017.2.1.01.

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Abstract— The domain decomposition method involves the finite element solution of problems in the parallel computer. The finite element discretization leads to the solution of large systems of linear equation whose matrix is naturally sparse. The use of proper storing techniques for sparse matrix is fundamental especially when dealing with large scale problems typical of industrial applications. The aim of this research is to review the sparsity pattern of the matrices originating from the discretization of the elasto-plastic and thermal-convection problems. Some practical strategies dealing with sparsity pattern in the finite element code of adventure system are recalled. Several efficient storage schemes to store the matrix originating from elasto-plastic and thermal-convection problems have been proposed. In the proposed technique, inherent block pattern of the matrix is exploited to locate the matrix element. The computation in the high performance computer shows better performance compared to the conventional skyline storage method used by the most of the researchers.
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25

Paparizos, L. G., and W. D. Iwan. "Some Observations on the Random Response of an Elasto-Plastic System." Journal of Applied Mechanics 55, no. 4 (December 1, 1988): 911–17. http://dx.doi.org/10.1115/1.3173741.

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The nature of the response of strongly yielding systems subjected to random excitation, is examined. Special attention is given to the drift response, defined as the sum of yield increments associated with inelastic response. Based on the properties of discrete Markov process models of the yield increment process, it is suggested that for many cases of practical interest, the drift can be considered as a Brownian motion. The approximate Gaussian distribution and the linearly divergent mean square value of the process, as well as an expression for the probability distribution of the peak drift response, are obtained. The validation of these properties is accomplished by means of a Monte Carlo simulation study.
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26

Meng, Wenjun, and Yao Wang. "Comprehensive analyses of the elasto-plastic oblique contact-impact with vibration response." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 2 (October 3, 2018): 441–54. http://dx.doi.org/10.1177/1464419318801732.

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Contact-impact between different surfaces is a ubiquitous phenomenon especially in the mechanical systems. Previous work of authors indicated that the effect of longitudinal and/or transverse vibration response during the motion and dynamic modeling cannot be neglected for the elasto-plastic contact-impact events. In this study, further analyses were performed to characterize the contribution of longitudinal and transverse vibration responses during the elasto-plastic oblique contact-impact, and the formula to calculate the influence factor of vibration, ξ, was proposed based on the contact force with different vibrations during the impact. The momentum theorem and assumed mode method were used to develop the equations of motion of a flexible bar with a solid flat surface. Simulation results were compared with experimental results reported in the literature to verify the accuracy of the established model. The tangential and normal velocities of the contact point after the impact were compared with the simulations for different vibration cases, and the comparison between the simulations and the experimental results had yield encourage results. For different elasto-plastic materials, three critical initial impact angles had been found from the simulation to determine whether the flexible bar slides or sticks the flat surface. Although considering the effect of vibration response during the motion and dynamic modeling is very significant, increasing the number of shape functions did not effect the result significantly. The longitudinal and transverse vibration responses were found to effect the normal and tangential velocities of the contact point after the impact, respectively. Moreover, it had been shown that for the oblique contact-impact with sliding, considering the response of longitudinal and transverse vibration at the same time is more reasonable than other cases, which also reveals that, in this case, there is a good agreement between the simulation and experimental results. Besides, the mathematical expression on the influence factor of vibration depending on the initial velocity also had been obtained by a numerical analysis. This work can provide useful insights for dynamic modeling of complex multi-body systems during the contact-impact.
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27

Galvis Salazar, Juan Camilo, Heriberto Enrique Maury Ramírez, and Roque Julio Hernández Donado. "Elasto-plastic model to determine the maximum force for shaft straightening process." Ingeniería e Investigación 37, no. 2 (May 1, 2017): 107–10. http://dx.doi.org/10.15446/ing.investig.v37n2.61064.

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This paper shows the development of a mathematical model based on elasto-plastic behavior of materials in order to determine the bending moment and the maximum straightening force required to repair a bent shaft. The importance of this work is because many machines use shafts to transmit power and movement, and these elements can suffer permanent deflections during operation cycles. An appropriate reparation process can increase the life of these elements significantly. Knowing the mechanics for a straightening process is essential for design, processes and maintenance engineers in charge of systems that use these elements (shafts).
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28

OHNO, Tomonori, and Takashi NISHIOKA. "Control of input energy for elasto-plastic multi-mass systems subjected to seismic motion." Doboku Gakkai Ronbunshu, no. 356 (1985): 247–57. http://dx.doi.org/10.2208/jscej.1985.356_247.

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29

Tabbuso, Pietro, Seymour M. J. Spence, Luigi Palizzolo, Antonina Pirrotta, and Ahsan Kareem. "An efficient framework for the elasto-plastic reliability assessment of uncertain wind excited systems." Structural Safety 58 (January 2016): 69–78. http://dx.doi.org/10.1016/j.strusafe.2015.09.001.

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30

ITO, Tomohiro, Masashi MICHIUE, and Katsuhisa FUJITA. "Investigation of Optimal Seismic Design Methodology for Piping Systems Supported by Elasto-Plastic Dampers." Journal of System Design and Dynamics 3, no. 1 (2009): 59–69. http://dx.doi.org/10.1299/jsdd.3.59.

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31

ITO, Tomohiro, Masashi MICHIUE, and Katsuhisa FUJITA. "Investigation of Optimal Seismic Design Methodology for Piping Systems Supported by Elasto-plastic Dampers." Journal of System Design and Dynamics 4, no. 2 (2010): 348–59. http://dx.doi.org/10.1299/jsdd.4.348.

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32

Egner, H., M. Juchno, M. Kula, and J. Skrzypek. "Numerical Analysis of FG and TBC Systems Based on Thermo-Elasto-Plastic-Damage Model." Journal of Thermal Stresses 30, no. 9-10 (August 15, 2007): 977–1001. http://dx.doi.org/10.1080/01495730701499057.

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33

Shen, Zu-Yan, Chao-Xu Lai, and Xian-Zhong Zhao. "A Synthetic Discrete Method for Analyzing the Elasto-plastic Seismic Response of Tall Steel Framed-tube Systems." Advances in Structural Engineering 1, no. 3 (July 1998): 177–83. http://dx.doi.org/10.1177/136943329800100302.

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In this paper, a synthetic discrete method, which combines the merits of both finite element method and Ritz method, is presented for the analysis of elasto-plastic seismic response of tall steel framed-tube systems. The generalized column element and generalized beam element are correspondingly established. Using this proposed method, the computing degree of freedom of the system is considerably reduced and the calculating efficiency is greatly increased so that the method is able to be implemented on both desktop and notebook computers and possesses extremely high precision.
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34

Nesenenko, Sergiy. "Lq-almost solvability of inelastic models of monotone type." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 141, no. 4 (July 15, 2011): 835–64. http://dx.doi.org/10.1017/s0308210510001174.

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It is well known that the loss of the coerciveness for governing monotone nonlinearities in evolution equations/inclusions can lead to the problem having no solution for given data, and the rule for choosing appropriate data has to be prescribed. Allowing constitutive functions in the evolution relations for elasto-/visco-plastic models of monotone type to be non-coercive, we first give a new (relaxed) meaning to the solvability of the systems of equations under consideration and then we define criteria for choosing admissible data, which guarantees the solvability in the defined sense. Realizing this strategy, a slight extension of the well-developed monotone-operator method to our needs is performed. The theory is applied to some well-known models in elasto-/visco-plasticity. The relations between the standard notion of the solvability and defined one are investigated.
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35

Sun, J. F., G. L. Wang, and H. O. Zhang. "Elasto-plastic contact problem of laying wire rope using FE analysis." International Journal of Advanced Manufacturing Technology 26, no. 1-2 (April 7, 2004): 17–22. http://dx.doi.org/10.1007/s00170-004-2120-9.

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36

Lee, Chang-Kyun, Eun-ho Lee, Jinwoo Im, ChiWoong Ra, and No-Cheol Park. "Determination of Fourier expansion number for elasto-plastic analysis of piping systems using flexibility factor." Journal of Mechanical Science and Technology 36, no. 2 (February 2022): 637–46. http://dx.doi.org/10.1007/s12206-022-0111-0.

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37

Cuesta, Isabel, and Mark A. Aschheim. "Isoductile strengths and strength reduction factors of elasto-plastic SDOF systems subjected to simple waveforms." Earthquake Engineering & Structural Dynamics 30, no. 7 (2001): 1043–59. http://dx.doi.org/10.1002/eqe.51.

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38

Li, Jiachen, Cheng Liu, Haiyan Hu, and Shixiong Zhang. "Analysis of elasto-plastic thin-shell structures using layered plastic modeling and absolute nodal coordinate formulation." Nonlinear Dynamics 105, no. 4 (August 22, 2021): 2899–920. http://dx.doi.org/10.1007/s11071-021-06766-9.

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39

Di Egidio, Angelo, and Alessandro Contento. "Improvement of the Dynamic and Seismic Behaviour of Rigid Block-like Structures by a Hysteretic Mass Damper Coupled with an Inerter." Applied Sciences 12, no. 22 (November 13, 2022): 11527. http://dx.doi.org/10.3390/app122211527.

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The protection of rigid block-like structures against seismic hazards is a widely studied topic and has been achieved to different degrees with active and passive protection methods. For the protection of rigid block-like structures, this paper proposes the coupling of a rigid block-like structure, modelled as a single rigid block, with an external, auxiliary system through a hysteretic elasto-plastic device. The auxiliary system is constituted by an oscillating mass, whose inertial effects are amplified by the use of an inerter device. The auxiliary system works as a hysteretic mass damper. The elasto-plastic behaviour of the coupling device is described by the Bouc–Wen model. The mechanical model of the coupled system has two degrees of freedom, and its equations of motion can be written by following a direct approach. A preliminary analysis is performed by exciting different coupled systems and the corresponding stand-alone rigid blocks with harmonic base accelerations. Such an investigation is aimed at understanding the sensitivity of the dynamics of the coupled systems to the characteristics of the rigid blocks and auxiliary systems and is performed by comparing the frequency–response curves of the coupled systems with those of the corresponding stand-alone rigid blocks. A further analysis is performed to verify the effectiveness of the proposed protection methodology under seismic excitation. Both the harmonic and seismic analyses show that the main parameter to be tuned to achieve the protection of the rigid block-like structures is the apparent mass of the inerter device. A proper choice of such a mass improves the dynamics of the rigid block-like structures, leading to smaller oscillations for the same level of excitation.
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40

Lógó, János. "Optimal limit design of elasto-plastic structures for time-dependent loading." Structural and Multidisciplinary Optimization 33, no. 3 (September 28, 2006): 269–73. http://dx.doi.org/10.1007/s00158-006-0053-7.

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41

Shakhov, Sergey, and Nikita Nikolaev. "Management of structural and mechanical properties of moulding compound using mineral additives." MATEC Web of Conferences 239 (2018): 04022. http://dx.doi.org/10.1051/matecconf/201823904022.

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The purpose of work: the choice of the rational composition of the batch mixture, which improves the molding properties of the silt loams in the production of wall ceramics by the method of plastic molding. In the course of the study, the fraction-size distribution and morphological features of the fractions were analyzed on a photometric sedimentometer FSX-6K and by optical microscopy. Determination of the plastic strength of elasto-visco-plastic systems was carried out by Rehbinder’s conical plastometer. The values of fast and slow elastic and plastic deformations were determined on an installation operating on the principle of a parallel- shifting plate. For molding compounds with various corrective mineral additives, optimum values of molding moisture in which the compound is not adversely affected by shortage and excess moisture have been experimentally established; moduli of fast and slow elastic deformation and other structural and mechanical characteristics are determined. The percent values of the reduced deformations were obtained on the basis of rheological curves of disperse systems in the axes “deformation - shear time”. It is established that the additions of components of different genesis and with different fraction morphology affect the deformation behavior of the molding compounds.
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42

Chiba, T., and H. Kobayashi. "Response Characteristics of Piping System Supported by Visco-Elastic and Elasto-Plastic Dampers." Journal of Pressure Vessel Technology 112, no. 1 (February 1, 1990): 34–38. http://dx.doi.org/10.1115/1.2928583.

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Improving the reliability of the piping systems can be achieved by eliminating the mechanical snubber and by reducing the response of the piping. In the seismic design of piping system, damping is one of the important parameters to reduce the seismic response. It is reported that the energy dissipation at piping supports contributes to increasing the damping ratio of piping system. Visco-elastic damper (VED) and elasto-plastic damper (EPD) were developed as more reliable, high-damping piping supports. The dynamic characteristics of these dampers were studied by the component test and the full-scale piping model test. Damping effect of VED is independent of the piping response and VED can be modeled as a complex spring in the dynamic analysis. On the other hand, damping ratio of piping system supported by EPD increases with the piping response level. So, these dampers are helpful to increase the damping ratio and to reduce the dynamic response of piping system.
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43

Castrillón Trujillo, Juan Carlos, and Juan Manuel Meza Meza. "Deconvolution of design parameters from elasto-plastic energy data acquired by nanoindentation in ceramic coatings." Scientia et technica 22, no. 2 (June 30, 2017): 131. http://dx.doi.org/10.22517/23447214.12371.

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The elasto-plastic energies and the RID parameter (Relative Indentation Depth b=hmax/t), defined as the ratio between the maximum indentation depth and the coating thickness, were used to evaluate the ability of the ceramic coated systems to withstand load. The study was conducted on M2 and 304L steels coated with titanium nitride by PAPVD. Both substrates were coated with TiN of about 2,0 and 3,0 µm thickness. The hardness vs. (b) and the ratio of plastic to total energy (Wp/Wt) vs. (b) graphs were analyzed. There were found correlations between the indentation depths at which the transition from mechanical response due to the coating to the mechanical response of substrate-coating and to substrate dominated behavior and the depths at which the efficiency of using the coating falls 33% and 50 %. Results show that it is possible to get useful information from the energy taken from the mechanical response of the coated systems to avoid the Oliver and Pharr method for measuring the hardness and elastic modulus.
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44

Adjeloua, Abdelaziz, N. Boualem, H. Meddah, and A. Belarbi. "Numerical simulation of peel test for ductile thin film along ceramic substrate: Elasto-plastic analysis." Journal of Mechanical Engineering and Sciences 15, no. 1 (March 8, 2021): 7762–70. http://dx.doi.org/10.15282/jmes.15.1.2021.12.0612.

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Due to extensive applications of the thin film/substrate systems in engineering, the research on strength, ductility and reliability of these systems have attracted great deal of interest in recent years. The peel angle of debonded film on the ceramic substrate has a very important effect in the mechanical resistance of film/substrate bi-material. Among critical debonding parameters, peeling angle and thermal residual stresses can be a potential risk of brutal propagation causing the film/substrate composite failure under tensile loading. This study is carried out to analyze the peeling angle and residual thermal stresses effects with crack growth in the specimen. A two dimensional elastic-plastic finite element model is used to compute the J-integral and estimate the plastic zone size at the interfacial crack tip of film/substrate composite. Results show that the peeling phenomena is a fracture mixed mode where the dominance of either mode I or mode II is influenced by the peeling angle while delamination of thin film is greatly dependent on thermal residual stresses.
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45

Lauriere, M., Z. Li, L. Mertz, J. Wylie, and S. Zuo. "Free boundary value problems and hjb equations for the stochastic optimal control of elasto-plastic oscillators." ESAIM: Proceedings and Surveys 65 (2019): 425–44. http://dx.doi.org/10.1051/proc/201965425.

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We consider the optimal stopping and optimal control problems related to stochastic variational inequalities modeling elasto-plastic oscillators subject to random forcing. We formally derive the corresponding free boundary value problems and Hamilton-Jacobi-Bellman equations which belong to a class of nonlinear partial of differential equations with nonlocal Dirichlet boundary conditions. Then, we focus on solving numerically these equations by employing a combination of Howard’s algorithm and the numerical approach [A backward Kolmogorov equation approach to compute means, moments and correlations of non-smooth stochastic dynamical systems; Mertz, Stadler, Wylie; 2017] for this type of boundary conditions. Numerical experiments are given.
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46

SHINTANI, Masanori, Manabu HAMAI, and Shinjiro SHINTANI. "209 Study on Analytical Model of Nonlinear Vibration Systems with Gaps Used Elasto-Plastic Solid Model." Proceedings of Conference of Hokuriku-Shinetsu Branch 2000.37 (2000): 55–56. http://dx.doi.org/10.1299/jsmehs.2000.37.55.

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47

MAEKAWA, Akira, and Tsuneo TAKAHASHI. "Elasto-Plastic Response of Piping Systems with Pipe Support Structures Using Three-Dimensional Strong Excitation Test." Proceedings of Mechanical Engineering Congress, Japan 2017 (2017): J1010101. http://dx.doi.org/10.1299/jsmemecj.2017.j1010101.

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48

HATA, Ippei, Shinji ISHIMARU, and Jun HASEGAWA. "ON PERFORMANCE BASED DESIGN METHOD FOR SYSTEMS WITH NON-LINEAR VISCOUS DAMPER AND ELASTO-PLASTIC DAMPER." Journal of Structural and Construction Engineering (Transactions of AIJ) 72, no. 617 (2007): 47–54. http://dx.doi.org/10.3130/aijs.72.47_4.

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49

SHINTANI, Atsuhiko, Tomohiro ITO, and Chihiro NAKAGAWA. "Statistical Study on Optimization of Piping Systems Supported by Elasto-plastic Supports Subjected to Random Inputs." Proceedings of Conference of Kansai Branch 2017.92 (2017): 305. http://dx.doi.org/10.1299/jsmekansai.2017.92.305.

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50

OKAZAKI, Ranma, Takuya SHIOMI, Tomoyuki MATSUDA, Nanako MIURA, and Akira SONE. "The Experimental Verification of Response Reduction Effect of Elasto-Plastic Piping Systems Subjected to Multiple Input." Proceedings of the Dynamics & Design Conference 2016 (2016): 206. http://dx.doi.org/10.1299/jsmedmc.2016.206.

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