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Application of Moir, Interferometry to the Characterization of Orthotropic Materials in the Antisymmetric Configuration using the Virtual Fields Method

机译:Moir,干涉测量用虚拟字段方法在反对手配置中表征的表征

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摘要

Moir, interferometry is an effective full-field deformation measurement technique and has been utilized for mechanical behavior analysis of materials and structures. For isotropic materials, Moir, patterns can be obtained by performing standard tests, such as, tensile and bending tests, to calculate the displacement and strain. Then, the mechanical properties can be characterized. However, standard tests are not sufficient to characterize the mechanical parameters of anisotropic materials due to the complexity of their material properties. Thus, in this work, Moir, interferometry was combined with the Virtual Fields Method to obtain the four in-plane elastic constants (Q (11), Q (22), Q (12), and Q (66)) of orthotropic materials in the form of a diametrically compressed disk. Firstly, according to finite element method simulation results, optimized parameters can be achieved when the principal direction of the material does not coincide with the loading direction, making the loading configuration antisymmetric. Therefore, Moir, interferometry experiment was simulated to demonstrate the feasibility of measurement in the antisymmetric configuration. Finally, the Q (11), Q (22), Q (12) and Q (66) values of a unidirectional carbon fiber composite were measured in a real Moir, interferometry experiment using the proposed method, yielding results that agreed closely with those obtained using the strain gauges.
机译:莫尔,干涉测量是一种有效的全场变形测量技术,已被用于材料和结构的机械行为分析。对于各向同性材料,MOIR,通过进行标准测试,例如拉伸和弯曲试验,可以获得图案,以计算位移和应变。然后,可以表征机械性能。然而,由于其材料特性的复杂性,标准试验不足以表征各向异性材料的机械参数。因此,在该工作中,莫尔,干涉测量与虚拟场方法组合以获得正交材料的四个面内弹性常数(Q(11),Q(22),Q(12)和Q(66))以径向压缩盘的形式。首先,根据有限元方法模拟结果,当材料的主方向与装载方向不一致时,可以实现优化参数,使得装载配置反对称。因此,模拟莫尔,干涉测量实验,以证明在反对称配置中测量的可行性。最后,使用所提出的方法在真正的MoIr,干涉测量实验中测量单向碳纤维复合物的Q(11),Q(22)和Q(66)值,产生与那些紧密相同的结果使用应变仪获得。

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