| 短纤维/橡胶发泡复合材料的微观结构及拉伸破坏机理 |
| Microstructure and tensile failure mechanism of short fibre/rubber foam composite |
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| DOI： |
| 中文关键词: 短纤维 NR 橡胶发泡复合材料 拉伸破坏机理 |
| 英文关键词: short fibre NR foam rubber composite tensile failure mechanism |
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| 中文摘要: |
| 对锦纶短纤维增强的NR发泡材料的微观结构及拉伸破坏行为进行了研究，并分析了其破坏机理。采用未处理短纤维增强的NR发泡材料中短纤维成为泡孔的成核点，并大部分悬空在泡孔中，拉伸破坏时泡壁与短纤维结合处容易出现应力集中，成为裂纹的起始点，失效时短纤维大部分被抽出；预处理短纤维能与橡胶基体之间产生良好的粘合，从而处于橡胶基体中。其短纤维增强的NR发泡体拉伸产生的裂纹扩展时遇到纤维，纤维能起到承载应力、使应力转向、阻止裂纹扩展的作用，一定程度上改善了复合材料的拉伸强度等物理性能。 |
| 英文摘要: |
| The microstructure and tensile failure mechanism of nylon short fibre/NR foam composite were investigated.The results showed that the untreated short fibre in the short fibre/NR foam composite tended to be the nucleus of micro-pores and many fibres hung in the pores；the stress concentration tended to occur at the place around untreated fibres resulting in the origination of flaw and the drawnout of short fibre during tensile failure；and the pretreated short fibre was bonded well to rubber matrix and could bear the applied stress to prevent the composite from the crack propagation during tensile. |
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