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Modelling and evaluation of Young's Modulus of metal matrix composites using ultrasonic techniques

机译：超声技术对金属基复合材料杨氏模量的建模与评估

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The advantage of metal matrix composites lies in the fact that the possibility of taking specific properties of the constituent materials to meet specific demands. Metal matrix composites are a class of tailor-made materials with the capability to suit such diverse combinations ofproperties such as high modulus, strength, and hardness, wear resistance and low thermal expansion coefficients. Paniculate Metal Matrix Composites (PMMCs) are promising because of their homogeneous and isotropic material properties, low cost and ability to be formed using conventional metal processing techniques. These materials have emerged as potential candidates for a variety of structural applications in aeronautical, transportation and sports industries. Hence, mechanical property evaluation including Young's Modulus becomes a vital part for the qualification of the product. To evaluate the elastic properties of metal matrix composites, many nondestructive methods are being reported by many researchers. In this paper, the authors have derived a mathematical modelling for the prediction of Young's Modulus involving ultrasonic techniques. The validity of the evolved equation is experimentally verified and compared with existing models like Mura's Estimation, the Hashin and Shtrikman (HS) Equation and using the ANSYS software approach. It is seen that the prediction according to the proposed equation is well in agreement with existing standard models. Hence, by the proposed method, it is possible to find out the Young's Modulus of the MMC products which otherwise requires a test specimen for destructive testing (mechanical testing).
机译：金属基复合材料的优点在于以下事实：具有使构成材料的特定性能满足特定需求的可能性。金属基复合材料是一类量身定制的材料，能够适应多种不同的特性组合，例如高模量，强度和硬度，耐磨性和低热膨胀系数。颗粒状金属基复合材料（PMMC）前景广阔，因为它们具有均质和各向同性的材料特性，低成本以及可以使用常规金属加工技术形成的能力。这些材料已成为航空，运输和体育行业各种结构应用的潜在候选者。因此，包括杨氏模量在内的机械性能评估成为产品鉴定的重要组成部分。为了评估金属基复合材料的弹性，许多研究人员报告了许多非破坏性方法。在本文中，作者推导了数学模型，用于预测涉及超声技术的杨氏模量。通过实验验证了演化方程的有效性，并与现有模型（例如Mura估计，Hashin和Shtrikman（HS）方程）进行了比较，并使用ANSYS软件方法进行了比较。可以看出，根据提出的方程式进行的预测与现有标准模型非常吻合。因此，通过所提出的方法，有可能找出MMC产品的杨氏模量，否则其需要用于破坏性测试（机械测试）的测试样本。

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