YING Peng-fei, GE Yu-long, ZHAO Tian-qi, XIA Yong. CHARACTERIZATION OF IMPACT RESPONSE FOR JOINTS OF EXPOXY-BASED STRUCTURAL ADHEIVES[J]. Engineering Mechanics, 2023, 40(9): 224-237. DOI: 10.6052/j.issn.1000-4750.2022.01.0015
Citation: YING Peng-fei, GE Yu-long, ZHAO Tian-qi, XIA Yong. CHARACTERIZATION OF IMPACT RESPONSE FOR JOINTS OF EXPOXY-BASED STRUCTURAL ADHEIVES[J]. Engineering Mechanics, 2023, 40(9): 224-237. DOI: 10.6052/j.issn.1000-4750.2022.01.0015

CHARACTERIZATION OF IMPACT RESPONSE FOR JOINTS OF EXPOXY-BASED STRUCTURAL ADHEIVES

  • Adhesive connection is a traditional connecting technique in the manufacturing of lightweight bodies of vehicles. The modeling of adhesive joints is a crucial precondition for the crash safety design of lightweight vehicles. To fully capture the mechanical response of epoxy-based structural adhesive with high tenacity and improve the accuracy of existing models of joint failure under impact loading, a constitutive model that considers the stress state effect, strain rate effect, and damage accumulation simultaneously is introduced in this study. Based on the constitutive model, this paper presents a method to recognize the model parameters and a corresponding parameter calibration process. Then, two material models for different epoxy-based adhesives are established. The constitutive model and characterization approach introduced in this study are verified through a result comparison between FE simulations and multi-level impact tests. The bulk specimen tests, adhesive joints tests, and structural impact tests are included in this study.
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