Characterization of mixed-mode fracture based on a complementary analysis by means of full-field optical and finite element approaches
Characterization of mixed-mode fracture based on a complementary analysis by means of full-field optical and finite element approaches
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DOI：
10.1007/s10704-012-9794-z
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发表时间：
2013-03
影响因子：
2.5
通讯作者：
M. Méité;O. Pop;F. Dubois;J. Absi
中科院分区：
文献类型：
--
作者：
M. Méité;O. Pop;F. Dubois;J. Absi
本文着重于通过使用两种形式的基础上裂纹相对位移因子和应力强度因子，分别表征的混合型断裂参数。裂纹相对位移因子的评价是基于运动学方法，该方法集成了由数字图像相关方法测量的实验位移场。与此步骤并行，从有限元分析计算应力强度因子。这两种方法之间的耦合允许在没有材料弹性特性的任何先验知识的情况下，根据能量释放率来识别断裂参数。根据混合模式配置，可以计算对应于打开和剪切模式的能量释放率的比例。此外，建议的形式主义允许确定，除了断裂参数，在减少的弹性顺应性方面的局部弹性性能直接从测试样品。实验协议进行了使用单边缺口试样由刚性聚氯乙烯聚合物加载在各种混合模式比值。
This paper focuses on the characterization of mixed-mode fracture parameters through use of two formalisms based on Crack Relative Displacement Factors and Stress Intensity Factors, respectively. The evaluation of Crack Relative Displacement Factors is based on a kinematic approach that integrates the experimental displacement field measured by a digital image correlation method. In parallel with this step, the stress intensity factor is calculated from a finite element analysis. The coupling between these two approaches allows for the identification of fracture parameters in terms of an energy release rate without any prior knowledge of material elastic properties. Depending on the mixed-mode configuration, the proportion of the energy release rate corresponding to opening and shear modes can be calculated. Moreover, the proposed formalism allows determining, in addition to fracture parameters, the local elastic properties in terms of reduced elastic compliance directly from the test sample. Experimental protocols are carried out using a Single-Edge notched specimen made from a rigid Polyvinyl Chloride polymer loaded at various mixed-mode ratio values.