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Articles de revues sur le sujet « Dynamic stress analysis »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 1 février 2022

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1

Zhang, Fu Yuan, Deng Yuan Zhu, Shou Ren Ge et Xiao Bao Sun. « Dynamic Finite Element Analysis for Contact Stress of Dynamic Consolidation ». Applied Mechanics and Materials 353-356 (août 2013) : 502–6. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.502.

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Based on Abaqus/explicit dynamics finite element program, an ax symmetrical numerical model, the infinite fringe condition and friction contact condition were built, and then the surface contact stress condition of the dynamic consolidation was studied. The time-load properties of dynamic consolidation, the spread law of contact pressure for rammer bottom and the friction influence to contact stress between the hammer and foundation were gained. The results indicate that the dynamic consolidation load can be simplified to triangular load with the weight of the hammer itself; the contact stress distribution between the hammer and the foundation is not uniform; and frictionless contact hypothesis can led errors to the simulated result.

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2

Wang, Wenjing, Li Kai, Randy Gu et Anand Asundi. « Dynamic Stress Concentration – a Hybrid Analysis ». Physics Procedia 19 (2011) : 220–26. http://dx.doi.org/10.1016/j.phpro.2011.06.152.

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3

Hirai, Tsuneo, Tsutao Katayama et Hidetake Yamamoto. « Dynamic Stress Analysis of Fracture Callus. » Transactions of the Japan Society of Mechanical Engineers Series A 59, n^o 560 (1993) : 1173–78. http://dx.doi.org/10.1299/kikaia.59.1173.

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4

Hirai, Tsuneo, Tsutao Katayama et Hidetake Yamamoto. « Dynamic Stress Analysis of Fracture Callus ». JSME international journal. Ser. A, Mechanics and material engineering 38, n^o 2 (15 avril 1995) : 242–48. http://dx.doi.org/10.1299/jsmea1993.38.2_242.

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5

Teixeira de Freitas, J. A., et Z. M. Wang. « Elastoplastic dynamic analysis with hybrid stress elements ». International Journal for Numerical Methods in Engineering 53, n^o 3 (2001) : 515–37. http://dx.doi.org/10.1002/nme.282.

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6

AMADA, Shigeyasu. « Dynamic stress analysis of rotating hollow discs. » Transactions of the Japan Society of Mechanical Engineers Series A 51, n^o 469 (1985) : 2103–11. http://dx.doi.org/10.1299/kikaia.51.2103.

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AMADA, Shigeyasu. « Dynamic Stress Analysis of Hollow Rotating Discs ». Bulletin of JSME 29, n^o 251 (1986) : 1383–89. http://dx.doi.org/10.1299/jsme1958.29.1383.

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8

Ramamurti, V., et N. C. Narayanan. « Dynamic stress analysis of roller clutch sleeve ». Computers & ; Structures 33, n^o 2 (janvier 1989) : 403–10. http://dx.doi.org/10.1016/0045-7949(89)90011-4.

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9

Zhao, Jin Bin, Hui Meng Zhao, Xiao Liu et Jie Meng. « Dynamic Feature Analysis for Silty Sand ». Advanced Materials Research 1089 (janvier 2015) : 223–27. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.223.

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Dynamic shear modulus is proportional to average principal stress.Cyclic varied surrounding pressure isn't proportional to cyclic varied pore water pressure.The dynamic triaxial test with cyclic surrounding pressure can apply cyclic surrounding pressure.The dynamic triaxial test with cyclic surrounding pressure can apply cyclic surrounding pressure in addition to the cyclic deviator stress and it can simulate the coupling of cyclic shear stress and it can simulate the coupling of cyclic shear stress and cyclic normal stress in an earthquakes.

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10

Liu, Hong Bin, Lei Zhang et Yong Sheng Shi. « Dynamic Finite Element Analysis for Tapered Roller Bearings ». Applied Mechanics and Materials 533 (février 2014) : 21–26. http://dx.doi.org/10.4028/www.scientific.net/amm.533.21.

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Based on the finite element method of explicit dynamics and contact dynamics mechanics, a three dimensional solid finite element model was developed introducing physical elements for tapered roller bearing. The dynamic process numerical simulation of tapered roller bearing was carried out in ABAQUS. The vibration curves of the nodes on roller were drew. The changes of contact stress and contact stress distribution of rings, rollers and the cage in the process were analyzed. The results show it is basically consistent with the actual movement of rolling bearings.

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11

LIAO, HONGJIAN, ZHIGANG ZHANG, CHUNMING NING, JIAN LIU et LI SONG. « ANALYSIS OF DYNAMIC STRESS-STRAIN RELATIONSHIP OF LOESS ». International Journal of Modern Physics B 22, n^o 31n32 (30 décembre 2008) : 5559–65. http://dx.doi.org/10.1142/s0217979208050814.

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This paper aims to study dynamic properties of loess. This study is helpful to the subject on how to avoid or decrease the seismic disasters on loess ground. Dynamic triaxial tests are carried out with saturated remoulded soil samples taken form loess sites in Xi'an, China. Dynamic stress and strain relationship as well as the rule of the accumulated residual strain are obtained from the test results. Linear relationship between accumulated residual strain and vibration circle under constant amplitude circular loading is presented. A hypothesis about the accumulated residual strain is proposed. 1D dynamic constitutive relationship model which can well describe the real relationship between dynamic stress and strain under irregular dynamic loading is established. Numerical program with this model is developed and an example is tested. Numerical results of hysteresis loop, accumulated residual strain, amplitude of dynamic stress and damping ratio show good agreement with test results. It is indicated that the hypothesis of accumulated residual strain and the 1D dynamic constitutive relationship model can accurately simulate the dynamic triaxial tests of saturated remoulded loess.

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12

Baek, W. K., R. I. Stephens et B. Dopker. « Integrated Computational Durability Analysis ». Journal of Engineering for Industry 115, n^o 4 (1 novembre 1993) : 492–99. http://dx.doi.org/10.1115/1.2901795.

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A computer aided analysis method is described for durability assessment in the early design stages using multibody dynamic analysis, finite element stress analysis, and fatigue life prediction methods. From multibody dynamic analysis of a mechanical system, dynamic loads of a mechanical component were calculated. Finite element stress analysis with substructuring techniques produced accurate stress fields for the component. From the dynamic loads and the stress field of the component, a dynamic stress history at the critical location was produced using the superposition principle. Using Neuber’s rule, a local strain time history was produced from the dynamic stress history. The local strain based fatigue life prediction method was then used to predict “crack initiation” life of the critical component. The predicted fatigue crack initiation life was verified by experimental durability tests. This methodology can be combined with identification of weak links and optimization techniques such that the design optimization for an entire mechanical system based upon durability is possible during the early product development stage.

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안기원, HWANGWONGUL et 성원석. « Dynamic Stress Analysis of Cranktrain Using Flexible Multi-Body Dynamic Model ». Journal of the Korean Society of Mechanical Technology 12, n^o 4 (décembre 2010) : 67–74. http://dx.doi.org/10.17958/ksmt.12.4.201012.67.

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Todo, Mitsugu, Kenzo Toshiyuki, Shuya Ide, Jun Ito, Masaaki Mawatari et Takao Hotokebuchi. « STRESS ANALYSIS OF COMPLETE FLEXION KNEE CFK UNDER DYNAMIC MOTION(2D1 Artificial Organs & ; Implants II) ». Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2007.3 (2007) : S156. http://dx.doi.org/10.1299/jsmeapbio.2007.3.s156.

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15

Yu, Bin-yan, Quan-ke Feng et Xiao-ling Yu. « Dynamic simulation and stress analysis for reciprocating compressor crankshaft ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 227, n^o 4 (9 juillet 2012) : 845–51. http://dx.doi.org/10.1177/0954406212453523.

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With the continuous trend toward high speed and large size, the reciprocating compressor crankshaft faces more serious potential threat of crack due to vibration. Therefore, early stress analysis of the crankshaft must be done thoroughly in the design stage. This article introduces a method, which combines flexible body dynamic and finite element analysis to calculate stress of the crankshaft. In this method, the load variation with time is obtained by flexible body dynamics simulation of crank and connecting rod mechanism. After that loads are loaded on finite element model of the crankshaft, and then the stress of the crankshaft is calculated in time domain. This stress can be utilized to do fatigue analysis and predict the life of crankshaft. Using this method, stress of a practical crankshaft, belonging to 6M51 reciprocating compressor, is calculated. The result showed that the maximum von Mises stress is 158 MPa, and the estimated life, which was calculated by Palmgren–Miner linear damage accumulation theory, is 2.0230e + 007 hours.

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SHINOZAKI, Takahiro, Hayato O-TUKA, Wenhai GUAN, Makoto ANDO, Yoshihito KUROSHlMA et Nao-Aki NODA. « 1204 Dynamic Stress Concentration Analysis for Notched Polycarbonate ». Proceedings of Conference of Kyushu Branch 2012.65 (2012) : 419–20. http://dx.doi.org/10.1299/jsmekyushu.2012.65.419.

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17

Anbu, T., S. Govindaraji, C. Kannadhasan et S. Selvakumar. « Stress Analysis of Crankshaft Subjected To Dynamic Loading ». IOSR Journal of Mechanical and Civil Engineering 11, n^o 4 (2014) : 35–39. http://dx.doi.org/10.9790/1684-11423539.

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18

SUGIURA, Masakatsu, et Zenji ANDO. « Dynamic Stress Analysis of Plates of Different Materials ». JSME international journal. Ser. 1, Solid mechanics, strength of materials 31, n^o 3 (1988) : 545–53. http://dx.doi.org/10.1299/jsmea1988.31.3_545.

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19

Tian, Z. G., X. Y. An, Y. Yang et L. K. Zhao. « Dynamic Stress Analysis of a Composite Electromagnetic Track ». Strength of Materials 50, n^o 5 (septembre 2018) : 743–51. http://dx.doi.org/10.1007/s11223-018-0019-1.

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20

Bai, Xin Li, Yuan Yuan Fan, Wei Yu et Dan Fei Wang. « Dynamic Response Analysis of Large Aqueduct Structure ». Advanced Materials Research 255-260 (mai 2011) : 1159–62. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.1159.

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Dynamic response analysis is carried out for an aqueduct structure of the South-to-North Water Transfer Project. The interaction of water and aqueduct wall is simplified using Housner method. Six different water depths (empty aqueduct, 1/4 water depth, 1/2 water depth, 3/4 water depth, designed water depth and full water depth) are considered and calculation is conducted using time-history analysis method. The variation rule of dynamic stress and dynamic displacement are gained under different water depths. Results show that water has great influence on aqueduct body and its dynamic response. Dynamic displacement and dynamic stress of the aqueduct structure increase with the aqueduct water level increases. When water depth is bigger, dynamic displacement response and dynamic stress response are later than corresponding earthquake excitation. The relative stiffness of the longitudinal beam and the transverse beam should be fully considered in order to reduce stress concentration of aqueduct body.

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21

Lu, Yaohui, Heyan Zheng, Chuan Lu, Tianli Chen, Jing Zeng et Pingsha Dong. « Analysis methods of the dynamic structural stress in a full-scale welded carbody for high-speed trains ». Advances in Mechanical Engineering 10, n^o 10 (octobre 2018) : 168781401880591. http://dx.doi.org/10.1177/1687814018805917.

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The calculation of the dynamic stress of a large and complex welded carbody is the key to the fatigue design and the durability evaluation of the carbody. Adopting the advanced structural stress based on the finite element method, a new finite element transformation method between random loads and dynamic stresses is proposed to be applied in carbody for high-speed trains. The multi-axial random dynamic load spectrums of full-scale carbody are obtained by the vehicle system dynamics method, and the shell finite element model of a full-scale carbody is established. Adopting the concept of a surrogate model, the finite element transformation relationship between the random load and the dynamic structural stress at concerned points is constructed by using multidisciplinary methods to compute the dynamic stress spectrums of concerned points at the welding seam, and dynamic structural stresses are compared and validated through carbody rig-test. The analysis methods of dynamic structural stress are performed systematically for a full-scale welded structure, which provides reference methods for the fatigue durability evaluation of large-scale welded structures.

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22

Zhang, Wei, Bei Bei Sun et Xiao Bo Kang. « Modeling and Analysis of Main Drive Train in a Power-Driven Turret ». Advanced Materials Research 139-141 (octobre 2010) : 943–46. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.943.

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This work investigates dynamics of a three-stage gear system in a new power-driven turret. This paper mainly consists to develop two kinds of dynamic models of the main drive train. One is the dynamic contact model of the gear system to calculate the dynamic meshing forces and the tooth root stresses. The other is a virtual prototype model adequately incorporating the deformability of the bearings to analyze the dynamical response. The dynamic meshing force and the tooth root stress were compared with the theoretically calculated results. The vibration acceleration signals of the turret were gathered by tests. According to the experimental data, the simulation results of the virtual prototype model were given based on which the rationality of the virtual prototype model is verified.

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23

Chen, Jia Shiun, et Hsiu Ying Hwang. « Vehicle Dynamic Analysis and Fatigue Prediction ». Applied Mechanics and Materials 157-158 (février 2012) : 1025–30. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.1025.

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This research was to predict the life of vehicle components on an uneven random road. Flexible-body dynamic simulation was used for dynamic simulation and stress recovery. Based on the stress obtained from dynamic simulation, a fatigue life prediction was implemented. This process combined dynamic simulations and finite element analyses (FEA), including the interaction between dynamic forces and structure deformation. Comparing with traditional approach, dynamic and FEA calculation performed in sequence and separately, the proposed process could obtain more accurate structure stresses and better fatigue life prediction. With that, the production development time and cost could be significantly reduced.

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24

Akita, Koichi, Masatoshi Kuroda et Philip J. Withers. « Dynamic Analysis of Residual Stress Introduced by Laser Peening ». Materials Science Forum 524-525 (septembre 2006) : 135–40. http://dx.doi.org/10.4028/www.scientific.net/msf.524-525.135.

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Residual stress induced by laser single pulse irradiation was analyzed using a dynamic finite element code, ABAQUS/Explicit. The effects of the magnitude and length of a surface pressure pulse having a circular top-hat shape on the final residual stress in Ti-6Al-4V were investigated. A high peak pressure and/or a long pulse duration was effective in generating large compressive residual stress deep beneath the surface. However, large tensile residual stress features occurred near the centre and edge of the laser spot on the surface for high pressure and/or long pulse durations due to a radial focusing effect. Use of shorter pulse durations avoided this. The peak pressure (3GPa) required to induce a surface compressive residual stress across the whole area of the spot was slightly higher than the threshold pressure needed to plastically deform the surface.

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25

Gan, Feng Lin, et Xu Bo Jia. « Analysis of Guyed Transmission Tower Dynamic Characteristic ». Applied Mechanics and Materials 597 (juillet 2014) : 300–303. http://dx.doi.org/10.4028/www.scientific.net/amm.597.300.

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In the paper aiming at lots of 87(LM21) towers in Dongchang Hasong Transmission Line held under Changchun Extra-high voltage Bureau jurisdiction, by using ANSYS software, the nonlinear finite element model for towers is built. And numerical analysis methods is adopted. It is considered that the combined effect of stay wire and transmission tower, geometric non-linear effect and the influence of stay wire initial stress. The Dynamic Properties research about Guyed Transmission is conducted. It concluded that stay wire and tower's mode of vibrationare are relatively independent ,coordinated and the interaction of each other. Natural frequency of vibration and mode of vibration appears regularly and alternately changes with the increase of the formation order .Stay wire initial stress is main factor affecting the natural frequency of the structure and the frequency increases with the increase of stay wire initial stress.

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Li, Wu, et Tian You Fan. « Dynamic Analysis of Cracked Octagonal Quasicrystals ». Mathematical Problems in Engineering 2011 (2011) : 1–18. http://dx.doi.org/10.1155/2011/567489.

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We focus on the dynamic fracture problem of octagonal quasicrystals by applying a rectangular sample with a Griffith crack which is often used in classical elastic media based on the method of finite difference. This paper mainly is to investigate the variation of phonon, phason fields, and stress singularity around the crack tip including the stress intensity factor. In addition, the moving boundary due to the crack propagation has also been treated by introducing an additional condition for determining solution. The influence of wave propagation and diffusion in the dynamic process is also discussed in detail. Through comparing the results of octagonal quasicrystals with the results of crystal, this paper proclaims the influence of phonon-phason coupling in dynamic fracture problem of octagonal quasicrystals which should not be neglected.

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Xiang, Jian. « Dynamic Response Analysis on Efficacy of CFG-Pile in Different Height Embankment ». Advanced Materials Research 311-313 (août 2011) : 145–48. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.145.

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In order to analyze the effect of embankment height to dynamic stability, Cross-section in the Beijing-Shanghai high-speed railway is chosen and the numerical simulation calculation method is applying. Distributing rules of dynamic displacement and dynamic stress of the subgrade surface and ground surface, attenuation rules of dynamic response and dynamic stress ratio between pile and soil on the vertical section were studied. It shows that the dynamic stress of pile and soil generally attenuates in depth and attenuation of dynamic stress ratio between pile and soil mostly concentrates into the scope of 10 meters beneath the ground. Moreover, with the increment of embankment height and attenuation of dynamic stress in direct proportion to the depth, the dynamic stress transferring to ground surface decrease and the dynamic displacement of ground surface minish. As a result, the scheme of CFG-pile with 3m scheme is superior to that of 2m scheme for enhancing dynamic stability and reducing dynamic displacement and stress in low embankment. It will be instructive to control design and construction for the low embankment in Beijing-Shanghai high-speed railway.

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Li, Guang Xi, Fan Xin Kong, Lin He et Li Yang. « Stress and Dynamic Characteristics Analysis of Multilayer Composite Flywheel ». Advanced Materials Research 655-657 (janvier 2013) : 185–89. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.185.

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Stress and dynamic characteristics analysis of Multilayer composite flywheel to study its natural frequency, stress and displacement distribution was investigated in this paper. Combined with the rotor structure characteristics, a calculation model was established on the basis of anisotropy symmetric theory. The analytic formulas with flywheel rotor at working speed were obtained. Established the finite element model of the rotor. The radial , hoop stress, radial displacement and dynamic characteristics at a random point were analyzed completely．The results indicate that the safety factor and the natural frequency meet the design requirements.

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Xu, Zhong Qi, Da Peng Liu et Jing Wang. « Three-Dimensional Finite Element Analysis on Subgrade Dynamic Stress Response under Moving Load ». Applied Mechanics and Materials 587-589 (juillet 2014) : 1034–38. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1034.

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Subgrade stress under static vehicle load is different from that under moving load. In order to study the law of subgrade dynamic stress under moving vehicle load, the paper established the three-dimensional analysis model with finite element software and calculated the subgrade dynamic stress of different depth. It is concluded that subgrade dynamic stress decreases with the increase of depth and the smaller the depth is, the faster the degradation is. To a certain depth, subgrade dynamic stress changes a little. Meanwhile, the paper analyzed the effect of surface layer modulus and thickness, roadbase modulus and the thickness, subgrade modulus on subgrade dynamic stress. It is concluded that surface layer modulus and thickness have little effect on subgrade dynamic stress , subgrade dynamic stress decreases when roadbase modulus and the thickness increase, especially for the depth of the subgrade is relatively small. Subgrade dynamic stress increases with the increase of subgrade modulus. Increase trend is more obvious when the depth is small.

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Sahir Arikan, M. A., et Bilgin Kaftanoglu. « Dynamic Load and Root Stress Analysis of Spur Gears ». CIRP Annals 38, n^o 1 (1989) : 171–74. http://dx.doi.org/10.1016/s0007-8506(07)62677-8.

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31

Babaei, H. « Stress Analysis of Gun Barrel Subjected to Dynamic Pressure ». International Journal of Mechanical Engineering and Applications 3, n^o 4 (2015) : 71. http://dx.doi.org/10.11648/j.ijmea.20150304.14.

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赵, 梓瑜. « Pressure Dynamic Analysis of Stress-Sensitive Shale Gas Reservoir ». Open Journal of Nature Science 04, n^o 03 (2016) : 327–32. http://dx.doi.org/10.12677/ojns.2016.43038.

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SUGIURA, Masakatsu, et Zenji ANDO. « Dynamic stress analysis of plates of different kinds material. » Transactions of the Japan Society of Mechanical Engineers Series A 53, n^o 495 (1987) : 2050–55. http://dx.doi.org/10.1299/kikaia.53.2050.

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Whitworth, Martin B. « Dynamic stress analysis by high-resolution reflection moire photography ». Optical Engineering 33, n^o 3 (1 mars 1994) : 924. http://dx.doi.org/10.1117/12.157660.

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Lafouresse, M. C., U. Bertocci et G. R. Stafford. « Dynamic Stress Analysis Applied to the Electrodeposition of Copper ». Journal of The Electrochemical Society 162, n^o 1 (11 novembre 2014) : D27—D35. http://dx.doi.org/10.1149/2.0261501jes.

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Tong, J. W., et H. Q. Li. « Dynamic stress analysis using simultaneously holo-interferometry and photoelasticity ». Optics and Lasers in Engineering 6, n^o 3 (janvier 1985) : 145–56. http://dx.doi.org/10.1016/0143-8166(85)90003-x.

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Okay, Sezer, Volkan Yildirim, Knut Büttner, Dörte Becher et Gülay Özcengiz. « Dynamic proteomic analysis of Phanerochaete chrysosporium under copper stress ». Ecotoxicology and Environmental Safety 198 (juillet 2020) : 110694. http://dx.doi.org/10.1016/j.ecoenv.2020.110694.

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Prutchi, David, et Mircea Arcan. « Dynamic contact stress analysis using a compliant sensor array ». Measurement 11, n^o 3 (juin 1993) : 197–210. http://dx.doi.org/10.1016/0263-2241(93)90039-k.

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Ju, Xuanze, Wei Fang, Hanjun Yin et Ying Jiang. « Stress analysis of the subsea dynamic riser baseprocess piping ». Journal of Marine Science and Application 13, n^o 3 (27 août 2014) : 327–32. http://dx.doi.org/10.1007/s11804-014-1264-8.

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Ambrožič, Milan, et Anatolij Nikonov. « DYNAMIC BIAXIAL STRESS ANALYSIS OF FLAT LAYERED CERAMIC COMPOSITES ». Materiali in tehnologije 55, n^o 2 (15 avril 2021) : 195–200. http://dx.doi.org/10.17222/mit.2020.055.

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We study theoretically the biaxial bending of symmetric, flat layered ceramic composites (laminates) due to external loading. We focus on three-layered alumina/zirconia laminates. We compare the principal stresses in the samples in the case of static and harmonic dynamic loading. The dynamic equation within the Kirchhoff theory for thin homogeneous plates is first generalized to the case of multilayered plates. It is solved numerically with the relaxation method, which we have developed for this purpose.

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Choi, Ji-Hun, Tae-Won Park et Jin-Hee Lee. « Stress Analysis and Shape Optimization of Dynamic Locking Tongue (DLT) Using FEM ». Transactions of the Korean Society of Mechanical Engineers A 36, n^o 6 (1 juin 2012) : 699–705. http://dx.doi.org/10.3795/ksme-a.2012.36.6.699.

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Liu, Xue Qiang, Jian Chun Zhang, Hao Zhang et Xin Hu. « Dynamic Load Simulation Analysis of Hemp Stalk ». Applied Mechanics and Materials 303-306 (février 2013) : 2724–26. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.2724.

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The distribution of maximum equivalent stress on hemp stalks at different roller speeds were scavenged by LS-PREPOST function. The stress and strain distributions of hemp stalk under the transversely even-distributed load are analyzed through ANSYS software. The results show that hemp decortication largely depended on the rotation speed of separation roller and the feeding rate. In addition, the failure degree of bast fiber, the maturity and the water content of the stalk, and the difference in mechanical properties and geometrical size should be also taken into account.

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Lv, Jincheng, Shike Zhang et Xinsheng Yuan. « A Green’s Function Approach for Dynamic Stress Analysis of Spherical Shell under the Isotropic Impact Load ». Mathematical Problems in Engineering 2015 (2015) : 1–7. http://dx.doi.org/10.1155/2015/169468.

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A Green’s function approach is developed for the analytic solution of thick-walled spherical shell under an isotropic impact load, which involves building Green’s function of this problem by using the appropriate boundary conditions of thick-walled spherical shell. This method can be used to analyze displacement distribution and dynamic stress distribution of the thick-walled spherical shell. The advantages of this method are able(1)to avoid the superposition process of quasi-static solution and free vibration solution during decomposition of dynamic general solution of dynamics,(2)to well adapt for various initial conditions, and(3)to conveniently analyze the dynamic stress distribution using numerical calculation. Finally, a special case is performed to verify that the proposed Green’s function method is able to accurately analyze the dynamic stress distribution of thick-walled spherical shell under an isotropic impact load.

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Yu, Tiantang, Yongling Lai et Shuohui Yin. « Dynamic Crack Analysis in Isotropic/Orthotropic Media via Extended Isogeometric Analysis ». Mathematical Problems in Engineering 2014 (2014) : 1–11. http://dx.doi.org/10.1155/2014/725795.

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The extended isogeometric analysis (X-IGA) is the combination of the extended finite element method (X-FEM) and the isogeometric analysis (IGA), so the X-IGA possesses the advantages of both methods. In this paper, the X-IGA is extended to investigate the dynamic stress intensity factors of cracked isotropic/orthotropic media under impact loading. For this purpose, a corresponding dynamic X-IGA model is developed, the Newmark time integration scheme is used to achieve a dynamic response, and the dynamic stress intensity factors are evaluated through the contour interaction integral technique. Numerical simulations show that the X-IGA results agree with other available reference solutions, and accurate results can be obtained by using the X-IGA with a relatively coarse mesh.

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Zhang, Dong Sheng, Zhang Lai Lv et Jian Jun Zhang. « Dynamic Analysis of Less-Teeth Gear Transmission System ». Applied Mechanics and Materials 397-400 (septembre 2013) : 446–50. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.446.

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According to the less-teeth gear design theory, the FEM model of less-teeth gear system was established, and its dynamic contact characteristic was analyzed, then dynamic contact simulation was realized. Laws of contact area, contact stress and tooth stress change over time were got, which can be used for the gear profile modification and dynamic characteristics optimization design of the less-teeth gear system.

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Tong, Bao Hong, Yin Liu, Xiao Qian Sun et Xin Ming Cheng. « Dynamic Finite Element Analysis of a Cylindrical Roller Bearing ». Applied Mechanics and Materials 143-144 (décembre 2011) : 437–42. http://dx.doi.org/10.4028/www.scientific.net/amm.143-144.437.

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A dynamic finite element analysis model for cylindrical roller bearing is developed, and the complex stress distribution and dynamic contacting nature of the bearing are investigated carefully based on ANSYS/LS-DYNA. Numerical simulation results show that the stress would be bigger when the element contacting with the inner or outer ring than at other times, and the biggest stress would appear near the area that roller contacting with the inner ring. Phenomenon of stress concentration on the roller is found to be very obvious during the operating process of the bearing system. The stress distributions of different elements are uneven on the same side surface of roller in its axis direction. Numerical simulation results can give useful references for the design and analysis of rolling bearing.

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Chen, Yuxiang, Mutellip Ahmat et Zhong-tang Huo. « Dynamic meshing incentive analysis for wind turbine planetary gear system ». Industrial Lubrication and Tribology 69, n^o 2 (13 mars 2017) : 306–11. http://dx.doi.org/10.1108/ilt-12-2015-0203.

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Purpose Irregular windy loads are loaded for a wind turbine. This paper aims to determine the form of gear failure and the working life of the gear system by assessing the dynamic strength of gears and dynamic stress distribution. Design/methodology/approach The helical planetary gear system of the wind turbine growth rate gearbox was investigated, and while a variety of clearance and friction gear meshing processes were considered in the planetary gear system, a finite element model was built based on the contact–impact dynamics theory, solved using the explicit algorithm. The impact stress of the sun gear of the planetary gear system was calculated under different loads. An integrated planetary gear meshing stiffness, and the error of system dynamic transmission error were investigated when the planetary gear meshes with the sun or ring gears. Findings The load has little effect on the sun gear of the impact stress which was known. The varying stiffness is different while the planetary gear meshes with the sun and ring gears. There were differences between the planetary gear system and the planetary gear, and with load, the planetary gear transmission error decreases. Originality/value This study will provide basis knowledge for the planetary gear system.

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Feng, Li Yan, Ying Juan Liu, Wen Zhi Xie et Jing Wei Huang. « Dynamic Contact Simulation Analysis of Spiral Bevel Gear Based on ANSYS/LS-DYNA ». Advanced Materials Research 912-914 (avril 2014) : 649–52. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.649.

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The meshing of spiral bevel gear is a very complicated nonlinear process.In order to obtain a more realistic stress , we take a pair of spiral bevel gear on EMU as the example to construct an accurate modeling with Pro/E and analyze its dynamics contact simulation with ANSYS/LS-DYNA. It calculates the distribution of the tooth surface’s stress during the entire dynamic meshing process. The curves of the tooth’s effective stress on different parts changing over time are obtained. At last, we make theoretical analysis on the calculation results.

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Liu, Na, Guo Xiang Li, Shuai Guo Lang, Yu Ping Hu et Xiao Ri Liu. « Fatigue Strength Analysis of Internal Combustion Engine Crankshaft Based on Dynamic Simulation ». Advanced Materials Research 442 (janvier 2012) : 281–85. http://dx.doi.org/10.4028/www.scientific.net/amr.442.281.

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This paper established multi-body dynamic model of block-crankshaft system by method of finite element substructure and multi-body dynamics, and carried out the distribution of dynamic stress acting on the crankshaft in a working cycle and on this basis carried out the fatigue strength analysis, then received the fatigue safety coefficient and fatigue life data of each part of the crankshaft.

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Hosseini-Tehrani, P., M. R. Eslami et H. R. Daghyani. « Dynamic Crack Analysis Under Coupled Thermoelastic Assumption ». Journal of Applied Mechanics 68, n^o 4 (19 septembre 2000) : 584–88. http://dx.doi.org/10.1115/1.1364490.

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A boundary element method using Laplace transform in time domain is developed for the analysis of fracture mechanic under coupled thermoelastic assumption. The transient coupled thermoelastic field is solved without need for domain discretization. The singular behavior of the temperature and displacement fields in the vicinity of the crack tip is modeled by quarter-point elements. Thermal dynamic stress intensity factors for mode I are evaluated from computed nodal values, using the well-known displacement and traction formulas. The accuracy of the method is investigated through comparison of the results with the available data in literature. The conditions where the inertia term plays an important role is discussed and variations of the dynamic stress intensity factor is investigated.

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