论文标题
MMA粘附层的模式II断裂：理论与实验
Mode II fracture of an MMA adhesive layer: theory versus experiment
论文作者
论文摘要
厚厚的粘合剂层在船舶建筑中具有潜在的结构应用，以将复合上层建筑与钢船体连接在一起。这项研究的目的是开发一种机械模型，用于在剪切载荷下此类圈接头的粘合性断裂。设计和制造由基于MMA的粘合剂和钢制粘附器制成的改良厚贴胶检测（TAISE）标本。通过数字图像相关（DIC）测量和监测这些关节的裂纹启动和生长。试图使用粘性区模型来预测裂纹开始时和峰值载荷下粘合剂层的剪切应变幅度，并预测裂纹生长的程度，这是整个粘合层剪切应变的函数。对于高剪切延展性的粘合剂层，评估了粘性区模型预测标本故障的几个特征的能力。
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.
