工艺与制造英文2023被引 4
测量即认知：超声点焊热塑性复合材料接头损伤容限行为的间接测量技术评估
To measure is to know: Evaluating indirect measurement techniques for observing the damage tolerance behaviour of spot welded thermoplastic composites
Eva T.B. Smeets, Calvin Rans, Saullo G. P. Castro, Irene Fernández Villegas · Delft University of Technology
摘要整理
热塑性复合材料圆形超声点焊接头中的损伤扩展位于被连接构件的界面处，导致接头内部损伤从外部不可见。本实验研究比较了三种不同的原位方法来间接测量损伤扩展。研究动机在于多点焊接接头在提高损伤容限方面的潜在优势，以及为认证需要证明损伤阻止和损伤扩展行为的必要性。研究重点是在疲劳试验过程中，通过全局试样柔度、局部面外位移和表面局部应变三种方式测量单点焊接单搭接剪切（SLS）接头中的损伤。采用数字图像相关（DIC）技术获取局部量。结果表明，局部量更适合获取损伤状态的详细信息，其中局部表面应变显示出更明显的特征，便于识别损伤位置。讨论了各方法的优势与挑战，以及在信息详细程度、通用性和获取损伤状态所需先验知识方面的差异。
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