Traction-based multi-scale nonlinear dynamic modeling of bolted joints: Formulation, application, and trends in micro-scale interface evolution. (May 2020)

• Record Type: Journal Article
• Authors: Balaji, Nidish Narayanaa; Chen, Wei; Brake, Matthew R.W.
• Is Part Of: Mechanical systems and signal processing. Volume 139(2020)
• Publication Date: 2020-05
• Subjects: Frictional systems -- Rough contact -- Zero thickness elements -- Surface characterization -- Bolted joints -- Multi-scale modeling; Structural dynamics -- Periodicals; Vibration -- Periodicals; Constructions -- Dynamique -- Périodiques; Vibration -- Périodiques; Structural dynamics; Vibration; Periodicals; 621
• DOI: 10.1016/j.ymssp.2020.106615
• Languages: English
• ISSNs: 0888-3270

Abstract

Highlights: A multi-scale modeling framework bridging micro-surface features and macro-dynamics. A coupled modal quasi-static solver employed for the dynamic characterization. Rough contact models used for constitutive modeling with Zero-thickness elements. Effectiveness of the framework demonstrated through validation with experimental data. Abstract: 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-Reuß-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.