Abstract The wedge driven test is a valuable tool to determine the mode I fracture energy ( G Ic ) of adhesives or interfaces in composites. At first glance, the test is simple enough (introduction of a wedge into the specimen midplane to progagate a crack) to be a good alternative to the standard method, the DCB test. However, friction between the wedge and the specimen’s arms is not properly dealt in existing studies and, consequently, there is still a need for a reliable test procedure. In this work, we present a test methodology and its associated data reduction procedure to obtain G Ic . The test does not need to measure the crack length and the friction coefficient is determined as the wedge is introduced in between the specimen’s arms. The new testing methodology is validated experimentally comparing the G Ic obtained from the wedge driven and the DCB tests. A very close agreement is obtained between them.

中文翻译：

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用楔驱动试验测量 I 型加载下界面的断裂能

摘要 楔形驱动试验是确定复合材料中粘合剂或界面的 I 型断裂能 (G Ic ) 的重要工具。乍一看，该测试非常简单（将楔形物引入试样中平面以扩展裂纹），可以很好地替代标准方法 DCB 测试。然而，现有研究中没有正确处理楔子和试样臂之间的摩擦，因此，仍然需要可靠的测试程序。在这项工作中，我们提出了一种测试方法及其相关的数据简化程序，以获得 G Ic 。该测试不需要测量裂纹长度，摩擦系数是通过将楔子插入试样臂之间来确定的。新的测试方法通过实验验证，比较从楔驱动和 DCB 测试获得的 G Ic。他们之间达成了非常密切的协议。