A new analytical model for the elastic-plastic behaviour of spot welded joints subjected to orthogonal load

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:46

Article

Vivio, Francesco¹  Fanelli, Pierluigi¹ 

[1] Univ Roma Tor Vergata, Dept Mech Engn, I-00133 Rome, Italy

关键词: Spot weld;    Variable thickness circular plate;    Elastic-plastic large deflection behaviour;    Analytical method;   

DOI  :  10.1016/j.ijsolstr.2008.09.006

来源: Elsevier

【 摘 要 】

An analytical procedure for the evaluation of the elastic-plastic stiffness behaviour of spot welded joints is presented. The procedure is based on a new model of spot weld region: a circular plate having variable thickness with a central rigid nugget, which is resolved using an original analytical method. The closed-form solution allows to describe the displacement of a rigid nugget when an axial orthogonal load is applied on the plate while plasticity and large deflections are present. The goal is to reach a reliable spot weld region model which can be used as the basis to develop a spot weld element in FE analysis even when plasticity and large deflections are in effect. The procedure is as completely original as no other can be found in the technical literature, and it has been applied to some examples of plates usually employed for spot weld analysis. The analytical results obtained by using the new general relations precisely match those obtained modelling spot weld area by FEA. (c) 2008 Elsevier Ltd. All rights reserved.

【 授权许可】

Free