This paper proposes an approach to defining the path of a curved crack in a single‐edge notched specimen with gray level residuals extracted from digital image correlation, followed by the calibration of the parameters of a cohesive zone model. Only the experimental force is used in the cost function minimized via finite element model updating. The displacement and gray level residual fields allow for the validation of the calibrated parameters. Last, the results are confronted with those given by a straight crack to highlight the benefits of accounting for the actual crack path.

中文翻译：

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砂浆弯曲裂缝内聚力区模型的确定

本文提出了一种方法，该方法使用数字图像相关性提取的灰度残差来定义单边缘缺口试样中的弯曲裂纹路径，然后对内聚区模型的参数进行校准。通过有限元模型更新，在最小化的成本函数中仅使用了实验力。位移和灰度残差字段允许对校准参数进行验证。最后，结果与直裂纹给出的结果相对，以强调说明实际裂纹路径的好处。