| 拉伸速率对聚苯乙烯断面形貌特征分布的影响 |
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| 引用本文： | 于杰,金志浩.拉伸速率对聚苯乙烯断面形貌特征分布的影响[J].贵州科学,1993,11(4):51-56. |
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| 作者姓名： | 于杰 金志浩 |
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| 作者单位： | 贵州工学院冶金系 550003(于杰)，西南交通大学材料系 710049(金志浩，郭生武，周惠久) |
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| 摘 要： | 本文研究了不同拉伸速率下的聚苯乙烯PS断面形貌特征及分布。结果表明:微坑形貌,平坦无特征区,剥离花样和岩石层状形貌是PS拉伸断面上的基本形貌。前二者对应PS银纹缓慢破裂;剥离花样是裂纹沿银纹/基体界面快速剥离扩展的结果;岩石层状形态是PS脆性分叉断裂的标志。拉仲速率及预生银纹导致断面形貌特征及分布发生变化。根据实验结果,探讨了PS拉伸断裂过程。
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| 关 键 词： | 拉伸速率 聚苯乙烯 裂纹 断面形貌 |
Effects of tensile deformation rates on fracture surface features of polystyrene |
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| Yu Jie et al..Effects of tensile deformation rates on fracture surface features of polystyrene[J].Guizhou Science,1993,11(4):51-56. |
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| Authors: | Yu Jie |
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| Institution: | Guizhou institute of technology |
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| Abstract: | The fracture surface features of different tensile defomation rates are studied in the paper. The results shows that the micro-void, smooth characterless region, peeling patterns and rocky patterns are basic elements of fracture surface morphology. Micro-Voids and smooth characterless regions are corresponding to slow rupture of PS crazes. Peeling patterns is arised by crack propagation along with the boundary between craze and matrix. Rocky patterns is due to brittle branching fracture of PS. Fracture Surface morphology is varied by prior interior craze of specimen or with changing tensile deformation rates.Based on fractography, the tension fracture process and the formation mechanism of some typical fracture surface are disscussed. |
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| Keywords: | polystyrene tensile rate fractography |
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