abaqus 中开发的哑节点单元，该单元能够模拟裂纹，并能够自动提取求解裂纹所需参数，避免了采用自带单元提取数据容易出现错的现象。简单方便。-abaqus in the development of the dummy node unit, which can simulate the crack, and the ability to automatically extract the necessary parameters to solve the crack to avoid the u