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Accurate measurement of in-plane and out-of-plane shear moduli on 3D woven SiC-SiBC material

机译：精确测量3D编织SiC-SiBC材料上的面内和面外剪切模量

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The aim of this study is to purpose a robust experimental method to measure both in-plane and out-of plane shear moduli of a 3D woven Ceramic Matrix Composites (CMC) SiC-SiBC, using torsion tests on rectangular bars. To construct this methodology, several data reduction process have been discussed. Then, the edge effects and their consequences on the shear moduli values have been investigated, using a Finite Element Analysis. Based on the findings of this preliminary study, a robust experimental methodology has been developed. Its originality stems on the use of 3D Digital Image Correlation (DIC) to measure properly twist angle on a restricted area, where the edge effects have lower influence. This methodology has been first validated by proceeding torsion tests on Aluminum bars with well known isotropic properties. Then, the experimental method has been extended to a 3D woven CMC SiC-SiBC material, to measure both its in-plane and out-of-plane shear moduli. (C) 2016 Published by Elsevier Ltd.
机译：这项研究的目的是采用一种强大的实验方法，通过在矩形钢筋上进行扭转试验，来测量3D编织陶瓷基复合材料（CMC）SiC-SiBC的面内和面外剪切模量。为了构建这种方法，已经讨论了几种数据缩减过程。然后，使用有限元分析研究了边缘效应及其对剪切模量值的影响。根据这项初步研究的结果，已经开发了一种可靠的实验方法。它的独创性在于使用3D数字图像相关性（DIC）在边缘影响较小的受限区域上正确测量扭曲角度。该方法首先通过对具有众所周知的各向同性特性的铝棒进行扭转测试而得到验证。然后，该实验方法已扩展到3D机织CMC SiC-SiBC材料，以测量其面内和面外剪切模量。 （C）2016由Elsevier Ltd.出版

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