STRESS-STRAIN CURVE OF A FIBRE-REINFORCED COMPOSITE
STRESS-STRAIN CURVE OF A FIBRE-REINFORCED COMPOSITE
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DOI：
10.1080/14786436908228703
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发表时间：
1969-01-01
影响因子：
1.6
通讯作者：
LILHOLT, H
中科院分区：
文献类型：
--
作者：
KELLY, A;LILHOLT, H
对10μ和20μ钨丝的应力-应变曲线进行了详细的测量。直径和相同铜丝的定向复合材料的直径。当应变大于铜的屈服应变时，根据混合物定律估算，基质中的表观应力非常高。这种影响似乎是由于两个阶段不同的侧向收缩引起的相互制约，因为当纤维屈服时，这种约束就消失了，因此横向收缩变得相同。将实验结果与完全塑性矩阵的预测结果进行了比较，发现应力比计算的要高。这意味着铜的屈服是渐进的，在复合材料的应力-应变曲线的第二阶段，铜的相当一部分继续弹性变形。
Careful measurements have been made of the stress-strain curves of tungsten wires of 10 μ and 20 μ. diameter and of aligned composites of the same wires in copper. At strains greater than the yield strain of the copper the apparent stresses in the matrix, evaluated from the law of mixtures, are very high. The effect appears to be due to the mutual constraint of the two phases caused by their different lateral contractions, since it disappears when the fibres yield and hence the transverse contractions become the same. The experimental results are compared with those predicted for a completely plastic matrix and the stresses are found to be higher than calculated. This is interpreted to mean that the yield of the copper is gradual, and that during stage II of the stress-strain curve of the composites an appreciable portion of the copper continues to deform elastically.