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Assessment of the crack system orientations of a ceramic matrix composite under off-axis tensile loading

机译:偏轴拉伸载荷下陶瓷基复合材料裂纹体系取向的评估

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To emphasize the anisotropy induced by damage on a ceramic matrix composite subjected to a tensile solicitation at 30 deg from one of the fiber directions, the changes of all the stiffness tensor components are determined from wave speed measurements of obliquely incident ultrasonic bulk waves. Using the additive form of the stiffness tensor of the damaged materials, the crack orientation is determined from the damage tensor, i.e., the part relative to the loss of stiffness caused by the microcracks. The search for the principal frame of this tensor from wave speed measurements allows the assessment of the microcrack orientation.
机译:为了强调在从纤维方向之一开始30度拉伸拉伸的陶瓷基复合材料上,由于损伤引起的各向异性,所有刚度张量分量的变化都由倾斜入射的超声波体波的波速测量确定。使用损坏材料的刚度张量的加法形式,由损坏张量,即相对于由微裂纹引起的刚度损失的部分来确定裂纹取向。从波速测量中搜索该张量的主框架可以评估微裂纹的方向。

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