Discrete Damage Modeling (DDM) of double shear lap bolted joint was performed. Regularized eXtended Finite Element Method (Rx-FEM) was used for the simulation of matrix cracking at initially unknown locations and in directions independent of the mesh orientation in a ply level 3D model. A set of input properties combining directly measured ply properties and properties empirically reduced from laminate level testing by using common industry practices was used for blind prediction of test data for 1.5D and 3.0D edge distance specimens with clamp-up. The simulations predicted the bearing strength characteristics for 1.5D configuration within 10% window, whereas for the 3.0D case the ultimate bearing strength was underpredicted by 20.3%. X-ray CT imaging of post-peak loaded specimens was performed. The observed failure modes and locations agreed with the experiment in most cases. A limited number of input parameters including fiber failure fracture toughness were varied in a parametric study.

进行了双剪切搭接螺栓连接的离散损伤建模（DDM）。正则化扩展有限元方法（Rx-FEM）用于在层级3D模型中最初未知的位置以及与网格方向无关的方向上模拟矩阵开裂。一组直接结合了直接测量的板层特性和通过使用常规行业实践从层压板水平测试中经验性降低的特性的输入特性，被用于盲目预测1.5D和3.0D边缘距离样品的夹持数据。该模拟预测了在10％的窗口内1.5D配置的轴承强度特性，而对于3.0D情况，最终的轴承强度却被低估了20.3％。对峰后加载的标本进行X射线CT成像。在大多数情况下，观察到的失效模式和位置​​与实验一致。在参数研究中，包括纤维断裂断裂韧性在内的有限数量的输入参数发生了变化。