应鹏飞, 葛宇龙, 赵天琪, 夏勇. 环氧基结构胶接头的冲击力学性能表征[J]. 工程力学, 2023, 40(9): 224-237. DOI: 10.6052/j.issn.1000-4750.2022.01.0015
引用本文: 应鹏飞, 葛宇龙, 赵天琪, 夏勇. 环氧基结构胶接头的冲击力学性能表征[J]. 工程力学, 2023, 40(9): 224-237. DOI: 10.6052/j.issn.1000-4750.2022.01.0015
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

环氧基结构胶接头的冲击力学性能表征

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

  • 摘要: 胶接是常见于轻量化车身制造的连接方式,胶接接头的失效行为建模是轻量化车身碰撞安全设计的重要前提。针对高韧性环氧基结构胶,该文选择了一种考虑应力状态、应变率效应和损伤累积的弹塑性本构模型表征其复杂冲击力学响应,以提高胶接接头失效模型的准确性。围绕此本构模型,开发了便于实施的模型参数识别方法和标定流程,建立了针对两种环氧基结构胶的材料模型。通过开展胶材本体、胶接接头及胶接结构等多层级冲击破坏实验与对应有限元仿真,验证了所选用的胶粘剂材料模型和胶接接头表征方法的可靠性。

     

    Abstract: 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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