Off-axis notched strength of fiber-metal laminates and a formula for predicting anisotropic size effect
Off-axis notched strength of fiber-metal laminates and a formula for predicting anisotropic size effect
复制标题
DOI：
10.1016/j.compositesa.2009.07.014
复制
发表时间：
2009-12-01
影响因子：
8.7
通讯作者：
Arai, Y.
中科院分区：
文献类型：
--
作者：
Kawai, M.;Arai, Y.
本文从实验和理论两方面研究了缺口尺寸和纤维取向对GLARE-3纤维-金属层合板离轴缺口强度的影响。缺口强度随缺口尺寸的增加而降低，与纤维取向无关。GLARE-3的缺口敏感性在纤维方向上最高，随着纤维取向角的增加而降低，在45 °方向上最低。从唯象的观点出发，提出了一种新的正交各向异性纤维复合材料多轴拉伸破坏准则。基于所提出的多轴破坏准则，导出了预测正交各向异性复合材料层合板离轴缺口强度的各向异性尺寸效应规律。通过与GLARE-3上的实验结果对比，证明了各向异性尺寸效应定律能够准确有效地预测GLARE-3的离轴缺口强度，而与缺口尺寸和纤维取向无关。(C)2009爱思唯尔有限公司保留所有权利。
Experimental and theoretical studies of the effects of notch size and fiber orientation on the off-axis notched strength of the fiber-metal laminate GLARE-3 have been conducted. The notched strength decreased with increasing notch size, regardless of the fiber orientation. The notch sensitivity in GLARE-3 was highest in the fiber direction, and it decreased with increasing fiber orientation angle to the lowest in the 45, direction. A new multiaxial criterion for the tensile failure of notched orthotropic fiber composites was developed from a phenomenological point of view. From the proposed multiaxial failure criterion, an anisotropic size effect law for predicting the off-axis notched strength of orthotropic composite laminates was derived. By comparison with the experimental results on GLARE-3, it was demonstrated that the anisotropic size effect law can accurately and efficiently predict the off-axis notched strength of GLARE-3, regardless of the notch size and fiber orientation. (C) 2009 Elsevier Ltd. All rights reserved.