Abstract This second paper presents a series of 4 crack propagation tests with the same experimental protocol as in a companion paper, but with some significant loading modifications. The first difference is that the loading is composed of in-plane rotation in addition to tension and shear translations. The second difference is that the loading is manually changed during the tests, depending on the crack tip location. This leads to tests with several bifurcations, and/or different loading ratios during the same test. One of them leads to mode I+II, and then mode I+III crack propagation. Some tests end with instabilities while others are controlled to be stable up to the complete failure of the specimen. In some cases, crack closure and friction between the crack faces occur.

中文翻译：

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使用六足和全场测量对砂浆试样进行的混合模式裂纹扩展测试的实验数据库。第二部分：交互式加载

摘要 这第二篇论文介绍了一系列 4 种裂纹扩展测试，其实验方案与配套论文中的实验协议相同，但有一些显着的加载修改。第一个区别是除了张力和剪切平移之外，载荷还由平面内旋转组成。第二个区别是在测试过程中手动改变载荷，这取决于裂纹尖端的位置。这会导致在同一测试期间进行多个分叉和/或不同加载比的测试。其中之一导致模式 I+II，然后模式 I+III 裂纹扩展。一些测试以不稳定性结束，而另一些测试则被控制为稳定，直到试样完全失效。在某些情况下，裂纹面之间会发生裂纹闭合和摩擦。