Failure Modeling of Adhesive Bonded Joints with Cohesive Elements

2017-01-0351

03/28/2017

Features
Event
WCX™ 17: SAE World Congress Experience
Authors Abstract
Content
Advanced high strength steels (AHSS) have been extensively used in the automotive industry for vehicle weight reduction. Although AHSS show better parent metal fatigue performance, the influence of material strength on spot weld fatigue is insignificant. To overcome this drawback, structural adhesive can been used along with spot weld to form weld-bond joints. These joints significantly improve spot weld fatigue performance and provide high joint stiffness enabling down-gauge of AHSS structures. However, modeling the adhesive joints using finite element methods is a challenge due to the nonlinear behavior of the material. In this study, the formulation of cohesive element based on the traction-separation constitutive law was applied to predict the initiation and propagation of the failure mode in the adhesively bonded joints for lap shear and coach peel specimens subjected to quasi-static loadings. The predicted load versus displacement relations correlated well with the test results.
Meta TagsDetails
DOI
https://doi.org/10.4271/2017-01-0351
Pages
6
Citation
Chen, G., and Guo, M., "Failure Modeling of Adhesive Bonded Joints with Cohesive Elements," SAE Technical Paper 2017-01-0351, 2017, https://doi.org/10.4271/2017-01-0351.
Additional Details
Publisher
Published
Mar 28, 2017
Product Code
2017-01-0351
Content Type
Technical Paper
Language
English