In this work, an analytical model consisting of Timoshenko beams coupled with a cohesive zone is used in order to analyze the extent of the cohesive fracture process zone within mechanical systems displaying beam-like features. This is the case, for example, for the double cantilever beam (DCB) specimen or for the wedge test specimen. The predictions of the model are displayed under the form of diagrams and formulas involving non-dimensional parameters, that can be readily used for example in the context of the identification of cohesive parameters from experimental data. The predictions are also compared to those of previous papers using beam models. It appears that in some configurations, for example soft materials with moderate toughness, the kinematic hypothesis of the Timoshenko beam is necessary in order to get accurate estimate of process zone lengths. The influence of the shape of the cohesive law is also discussed.

中文翻译：

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基于 Timoshenko 梁运动学的 DCB/楔形试验分析模型，用于准确确定内聚区长度

在这项工作中，使用由 Timoshenko 梁和粘性区域组成的分析模型来分析显示梁状特征的机械系统内的粘性断裂过程区的范围。例如，双悬臂梁 (DCB) 试样或楔形试样就是这种情况。模型的预测以涉及无量纲参数的图表和公式的形式显示，例如可以很容易地用于从实验数据中识别内聚参数的上下文中。还使用光束模型将这些预测与先前论文的预测进行了比较。似乎在某些配置中，例如具有中等韧性的软材料，Timoshenko 梁的运动学假设是必要的，以便准确估计工艺区长度。还讨论了内聚律形状的影响。