Tensile Strength Prediction of Short Fiber Reinforced Composites.
Tensile Strength Prediction of Short Fiber Reinforced Composites.
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DOI：
10.3390/ma14112708
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发表时间：
2021-05-21
期刊：
影响因子：
--
通讯作者：
Zhang CC
中科院分区：
文献类型：
--
作者：
Huang ZM;Guo WJ;Huang HB;Zhang CC
从本质上讲，短纤维增强复合材料(SFRC)在拉伸过程中的每一次破坏都是由一个母体破坏引起的，而母体破坏的预测是至关重要的。这只有在根据SFRC中的基质的应力集中系数(SCF)将基质的均匀应力转换为真值时才能实现。这样的SCF不能用经典的方式来确定。本文根据弹性法测得的骨架应力，推导出钢纤维混凝土中纵向拉伸应力集中系数的封闭公式。SFRC中的其他定向SCF与已有的连续纤维复合材料中的SCF相同。采用桥联模型对均匀应力进行了显式计算，仅利用原始强度数据对任意纤维长径比和纤维含量的钢纤维混凝土进行了失效预测。结果表明，纤维的体积分数、长径比和取向均对钢纤维混凝土的抗拉强度有显著影响。在一定范围内，钢纤维混凝土的抗拉强度随纤维长径比和纤维体积分数的增加而增加，且取向短纤维的强度高于随机短纤维排列的强度。大量SFRC的预测强度和可用测量强度之间的良好相关性表明了本方法的能力。
Essentially, every failure of a short fiber reinforced composite (SFRC) under tension is induced from a matrix failure, the prediction of which is of fundamental importance. This can be achieved only when the homogenized stresses of the matrix are converted into true values in terms of stress concentration factors (SCFs) of the matrix in an SFRC. Such an SCF cannot be determined in the classical way. In this paper, a closed-form formula for the longitudinal tensile SCF in the SFRC is derived from the matrix stresses determined through an elastic approach. The other directional SCFs in an SFRC are the same as those in a continuous fiber composite already available. A bridging model was used to calculate the homogenized stresses explicitly, and a failure prediction of the SFRC with arbitrary fiber aspect ratio and fiber content was made using only the original constituent strength data. Results showed that the volume fraction, the aspect ratio, and the orientation of the fiber all have significant effect on the tensile strength of an SFRC. In a certain range, the tensile strength of an SFRC increases with the increase in fiber aspect ratio and fiber volume content, and the strength of the oriented short fiber is higher than that of the random short fiber arrangement. Good correlations between the predicted and the available measured strengths for a number of SFRCs show the capability of the present method.
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DOI：
10.1088/0508-3443/3/3/302
发表时间：
1952-01-01
期刊：
BRITISH JOURNAL OF APPLIED PHYSICS
影响因子：
--
作者：
COX, HL
通讯作者：
COX, HL
影响因子：
9.1
作者：
Fu, SY;Lauke, B
通讯作者：
Lauke, B
影响因子：
13.1
作者：
Espinach, Francesc X.;Granda, Luis A.;Mutje, Pere
通讯作者：
Mutje, Pere
DOI：
10.1016/s1359-835x(00)00142-1
发表时间：
2001-01-01
影响因子：
8.7
作者：
Huang, ZM
通讯作者：
Huang, ZM
影响因子：
2.7
作者：
Ryu, HJ;Cha, SI;Hong, SH
通讯作者：
Hong, SH