Effects of intra- and inter-laminar resin content on the mechanical properties of toughened composite materials
Effects of intra- and inter-laminar resin content on the mechanical properties of toughened composite materials
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层内、层间树脂含量对增韧复合材料力学性能的影响
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
W. Bascom
中科院分区：
文献类型：
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作者：
D. Grande;L. Ilcewicz;W. Avery;W. Bascom
复合材料具有多相增韧的基质体系和以富含树脂的层间层(RIL)为特征的层压结构，是最近备受关注的主题。这种材料很可能在厚的压缩载荷结构中得到应用，例如商用飞机机身的龙骨区。通过对两种碳-环氧树脂体系的测试和分析，研究了树脂含量及其层间和层内分布对力学性能的影响。研究发现，RIL可降低层合板中基体裂纹的原位强化效应。在所研究的范围内，模式2的断裂韧性随着RIL厚度的增加而增加，而模式1的层间韧性几乎不受影响。对于无损伤、孔洞和冲击损伤的试件，压缩破坏应变随着树脂含量的增加而增加。用来预测离轴层基质开裂和冲击后压缩损伤容限的分析工具被成功地应用于具有RIL的材料。
Composite materials having multiphase toughened matrix systems and laminate architectures characterized by resin-rich interlaminar layers (RIL) have been the subject of much recent attention. Such materials are likely to find applications in thick compressively loaded structures such as the keel area of commercial aircraft fuselages. The effects of resin content and its interlaminar and intralaminar distribution on mechanical properties were investigated with test and analysis of two carbon-epoxy systems. The RIL was found to reduce the in situ strengthening effect for matrix cracking in laminates. Mode 2 fracture toughness was found to increase with increasing RIL thickness over the range investigated, and Mode 1 interlaminar toughness was negligibly affected. Compressive failure strains were found to increase with increasing resin content for specimens having no damage, holes, and impact damage. Analytical tools for predicting matrix cracking of off-axis plies and damage tolerance in compression after impact (CAI) were successfully applied to materials with RIL.