A Modified Procedure to Measure Bending Strength and Modulus of Advanced Composites by Means of Compression Bending
A Modified Procedure to Measure Bending Strength and Modulus of Advanced Composites by Means of Compression Bending
复制标题
通过压缩弯曲测量先进复合材料的弯曲强度和模量的改进程序
DOI：
10.1177/002199839502900204
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发表时间：
1995
影响因子：
2.9
通讯作者：
H. Uesugi
中科院分区：
文献类型：
--
作者：
H. Fukuda;H. Katoh;H. Uesugi
本文介绍了一种新的先进复合材料弯曲试验方法。虽然传统的三点和四点弯曲试验可以方便地获得弯曲模量和强度，但由于复合材料具有高的各向异性，并且它们以脆性方式失效，因此由于应力集中，复合材料可能在加载鼻部处失效。为了弥补上述缺点，我们开发了一种新的弯曲试验方法，它是基于一个柱的屈曲。强度和模量都可以测量。在本文中，另一个完善的方法来评估弯曲模量进行了讨论，除了弯曲强度。1300和T800碳/环氧单向和准各向同性层合板与不同的试样长度进行了测试。特别是在强度评定方面，证明了该方法的优越性。
This paper deals with a new bending test method for advanced composites. Although the conventional three and four-point bending tests are convenient to obtain bending modulus and strength, composites may fail at the loading nose due to the stress concentration, because composite materials have high anisotropy and they fail in a brittle manner. To compensate for the above shortcoming, we developed a new bending test method which is based on a buckling of a column. Both strength and modulus could be measured. In the present paper, another refined methodology to evaluate the bending modulus is discussed in addition to the bending strength. 1300 and T800 carbon/epoxy unidirectional and quasi-isotropic laminates with various specimen lengths were tested. The superiority of the present method was demonstrated especially for evaluating the strength.