玻璃材料的弹性模量评价技术和影响因素分析

弹性模量是反映材料抵抗外界作用力而引起变形的能力,是材料的基本力学性能之一。本文利用痕迹法、静态弯曲法、声共振法和超声波法等四种方法测量了普通浮法玻璃的弹性模量,并结合普通浮法玻璃在工程上应用的特点,比较了各种评价技术的优缺点。实验结果表明,痕迹法和超声波法虽然操作简单,且可在线测量,但影响弹性模量测量准确性的因素较多,离散性也比较大。静态弯曲法实验结果稳定但操作比较复杂。声共振法测量结果准确可靠,离散性极小,而且是一种无损测试技术,具有广泛的应用前景。

Elastic modulus ：reflects the stiffness to withstand an applied load, which is cnmmonly seen as one of the most important material properties in fracture mechanics for engineering materials. In this work, four different methods, viz., indentation depth method, static load-deflection, sonic-resonance method and unltrasonic speed method, are utilized to measure the elastic modulus of float glass. It is indicated that the scatter of the measured elastic modulus by indentation depth method and unltrasonic speed method is dispersive. Ahhough the results by static load-deflection method are steady, the operation is complex. Sonicresonance method may be a suitable method because it is a lossless testing method and the measured resuhs are reliable.