Measurement of Poisson’ s Ratio of C/ C Compositeby Laser Holographic Interferometry
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摘要:
根据激光全息术的基本原理,利用CCD 分别记录C/ C 复合材料试样弯曲状态变化前后的全息 图,分析材料弯曲应力状态下表面的干涉条纹图样,通过测量干涉条纹图样中相同相位条纹的渐近线之间的夹 角,求出C/ C 复合材料的泊松比。试验证明该方法简单易行,数据可靠,是一种有效测量C/ C 材料泊松比的方 法,激光全息术测得轴棒法C/ C 材料、针刺C/ C 材料、毡基C/ C 材料泊松比分别为0. 196、0. 183、0. 040。
Abstract:
In this paper,the principle and the method for the measurement of Poisson ratio of C/ C composite material by laser holographic interterometry are described. The result shows that this method is especially suitable for the measurement of C/ C composite Poisson’ s ratio. The mean value of Poisson’ s ratio of braided C/ C, needled punching C/ C, felted C/ C were 0. 196, 0. 183, 0. 040.