Traction-based multi-scale nonlinear dynamic modeling of bolted joints: Formulation, application, and trends in micro-scale interface evolution
Traction-based multi-scale nonlinear dynamic modeling of bolted joints: Formulation, application, and trends in micro-scale interface evolution
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DOI：
10.1016/j.ymssp.2020.106615
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发表时间：
2020-05-01
影响因子：
8.4
通讯作者：
Brake, Matthew R. W.
中科院分区：
文献类型：
--
作者：
Balaji, Nidish Narayanaa;Chen, Wei;Brake, Matthew R. W.
提出了一种新的螺栓结构动力学建模框架，该框架使用零厚度单元（ZTE）实现的基于多尺度牵引力的接触本构律来考虑螺栓结构的非线性界面建模。利用粗糙接触理论，可以用微尺度表面扫描估计的参数建立基本的本构关系。该模型被用于三螺栓搭接基准（所谓的“制动梁”）的框架中。由于界面表征是在有限元网格上进行的，因此该框架也适用于进行现场微尺度界面演化研究。初步研究了相关粗糙度参数的局部变化与预测的局部牵引力和耗散通量之间的关系。(C) 2020 Elsevier Ltd.版权所有。
A new framework for modeling the dynamics of bolted structures is proposed that considers the nonlinear interfacial modeling of bolted structures using multi-scale traction-based contact constitutive laws implemented through Zero-Thickness Elements (ZTE). Using rough contact theory, it is possible to establish fundamental constitutive relationships with parameters estimated from micro-scale surface scans. Such a model is employed in the framework for a three bolt lap-joint benchmark (the so-called "Brake-Reug-Beam"). Since the characterization of the interface is conducted in a full-field manner on top of a finite element mesh, the framework is also demonstrated to be applicable for conducting full-field micro-scale interface evolution studies. Preliminary studies are conducted to establish correlations of local changes in relevant roughness parameters with predicted local tractions and dissipation fluxes. (C) 2020 Elsevier Ltd. All rights reserved.