MMA粘结层II型断裂：理论与实验
Mode II fracture of an MMA adhesive layer: theory versus experiment
摘要：
厚的粘合剂层在船舶建造中具有潜在的结构应用，用于将复合上部结构连接到钢船体。本研究的目的是建立一个剪切载荷下搭接接头粘接断裂的力学模型。设计并制造了由MMA基粘合剂和钢粘合剂制成的改进的厚粘合体剪切试验（TAST）试样。裂纹萌生和扩展的这些接头的测量和监测数字图像相关（DIC）。尝试使用内聚区模型来预测裂纹萌生时和峰值载荷时整个粘合剂层的剪切应变的大小，并预测作为整个粘合剂层的剪切应变的函数的裂纹扩展的程度。一个凝聚力区域模型的能力来预测试样破坏的几个功能进行评估的情况下，高剪切韧性的粘合剂层。
英文摘要：
Thick adhesive layers have potential structural application in ship construction for the joining of a composite superstructure to a steel hull. The purpose of this study is to develop a mechanics model for the adhesive fracture of such lap joints under shear loading. Modified Thick-Adherend-Shear-Test (TAST) specimens made from a MMA-based adhesive and steel adherents are designed and fabricated. Crack initiation and growth of these joints is measured and monitored by Digital Image Correlation (DIC). An attempt is made to use a cohesive zone model to predict the magnitude of shear strain across the adhesive layer both at crack initiation and at peak load, and to predict the extent of crack growth as a function of shear strain across the adhesive layer. The ability of a cohesive zone model to predict several features of specimen failure is assessed for the case of an adhesive layer of high shear ductility.
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