Impact contact behaviors of elastic coated medium with imperfect interfaces
Impact contact behaviors of elastic coated medium with imperfect interfaces
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不完善界面弹性涂层介质的冲击接触行为
DOI：
10.1016/j.ijmecsci.2022.107743
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发表时间：
2022-09
影响因子：
7.3
通讯作者：
Qinghua Zhou
中科院分区：
文献类型：
--
作者：
Wanyou Yang;Pengpeng Bai;Jingbo Fang;Keao Qi;Qinghua Zhou
·建立了弹性球与非理想粘结涂层材料的冲击接触模型。·推导了非理想粘结涂层介质的位移和应力的频率响应函数。·采用共轭梯度法和二分搜索法计算冲击反力和压痕深度。·研究了冲击速度、界面条件和涂层厚度对接触性能和力学响应的影响。涂层-衬底系统界面不完善，位移和应力传递不连续，对涂层介质在冲击载荷作用下的力学响应有很大影响。本文提出了一种弹性运动球与非完全粘结半无限涂层-衬底系统的冲击接触模型，该系统具有位错和力状界面。冲击接触过程服从二阶Newmark理论和涂层介质接触理论。通过逐步迭代策略、二分搜索法和共轭梯度法(CGM)经济有效地确定了球的撞击速度、加速度和反作用力。借助于Papkovich-Neuber势，导出了非完全结合涂层-基板体系的位移场和应力场的解析显式表达式，并利用快速傅立叶变换(FFT)算法将其进一步变换到频域，以提高计算效率。引入了6个界面位移和应力的跳跃系数来描述不同的界面条件，研究了不同冲击速度下不同跳跃系数对非理想结合涂层-基材体系的冲击反作用力、接触半径、接触压力和次表面应力的影响。
• An impact contact model between an elastic ball and imperfectly bonded coated material is proposed. • Frequency response functions of displacement and stress of imperfectly bonded coated medium are derived. • A conjugate gradient method and a binary search method are used to calculate impact reaction force and indentation depth. • Effects of impact velocity, interfacial condition and coating thickness on contact performance and mechanical response are studied. Imperfect interface of coating-substrate system, where displacement and stress are transmitted discontinuously, affects mechanical response of coated medium subjected to impact loading a lot. This paper proposes an impact contact model between an elastic moving ball and imperfectly bonded semi-infinite coating-substrate system with combined dislocation-like and force-like interfaces. Impact contact process obeys the second-order Newmark theory and contact theory for coated medium. Impact velocity, acceleration and reaction force of the ball are cost-effectively determined by a step by step iterative strategy, binary search method and conjugate gradient method (CGM). Analytical explicit expressions of displacement and stress fields of imperfectly bonded coating-substrate system are derived with the assistance of the Papkovich-Neuber potentials, which are further transformed to frequency domain aiming at improving calculating efficiency through employing a fast Fourier transform (FFT) algorithm. Six jumping coefficients for interfacial displacement and stress are introduced to describe different interface conditions, and their effects on impact reaction force, contact radius, contact pressure and subsurface stress of imperfectly bonded coating-substrate system under different impact velocities are studied.
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影响因子：
6.6
作者：
Min Xu;C. Lam;D. Wong;E. Asselin
通讯作者：
Min Xu;C. Lam;D. Wong;E. Asselin
表面附近有垂直裂纹的层状材料的微动接触
影响因子：
7.3
作者：
Qingbing Dong;Zhuang Chen;Kun Zhou;Dong He
通讯作者：
Dong He
影响因子：
5.3
作者：
Xin Zhang;Q. Wang;T. He
通讯作者：
Xin Zhang;Q. Wang;T. He
DOI：
10.1115/1.2788874
发表时间：
1996-06
期刊：
Journal of Applied Mechanics
影响因子：
--
作者：
E. Kral;K. Komvopoulos
通讯作者：
E. Kral;K. Komvopoulos
影响因子：
2.5
作者：
Yuchuan Liu;Q. Wang;D. Zhu
通讯作者：
Yuchuan Liu;Q. Wang;D. Zhu