Abstract To simulate laminate delamination using least input parameters and with no iteration is still a challenge. As the laminate is essentially bonded from individual laminae by the matrix, there exists a matrix-layer between two adjacent lamina ones, and a delamination of them must be resulted from a matrix-layer failure. However, a three-dimensional finite element analysis indicates that the stresses of the matrix layer are generally so small that it cannot fail before one of the adjacent laminae assumes a failure. This contradiction suggests that there must be something missing from the elemental stresses of the matrix-layer near the delamination front. We introduce a modifying coefficient (MC) to the matrix-layer stresses, and the modified stresses are checked with a strength-failure criterion. Once a tensile or shear failure is attained, delamination occurs to the adjacent laminae. At any load step, either the layers of an element are completely bonded together or completely separated from each other. No iteration is necessary to identify a delamination in the element. Only an additional critical energy release rate from a DCB test is required. Reasonable correlation between predicted delamination propagations and free-edge delamination initiations and measured counterparts of a number of laminates confirm the efficiency of this work.

中文翻译：

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无需迭代即可预测层压板分层

摘要 使用最少的输入参数和不迭代来模拟层压板分层仍然是一个挑战。由于层压板本质上是由单个薄片通过基体粘合而成的，因此在两个相邻的薄片之间存在一个基体层，它们的分层必然是由于基体层失效造成的。然而，三维有限元分析表明，基体层的应力通常很小，以至于在相邻薄板之一发生失效之前它不会失效。这种矛盾表明，在分层前沿附近的基质层的基本应力中一定缺少某些东西。我们为基体层应力引入了修正系数 (MC)，并使用强度-破坏准则检查修正后的应力。一旦达到拉伸或剪切破坏，相邻层发生分层。在任何载荷步中，元件的各层要么完全结合在一起，要么彼此完全分离。无需迭代即可识别元件中的分层。只需要 DCB 测试的额外临界能量释放率。预测的分层传播和自由边缘分层起始与许多层压板的测量对应物之间的合理相关性证实了这项工作的效率。