所得改性不饱和聚酯的冲击断裂截面表现为韧性断裂；
The impact fracture section of modified unsaturated polyester showed ductile failure.
研究了共混体的相结构、冲击断裂机理和冲击强度之间的关系。
The relationship between the phase structure, the impact fracture mechanism and the impact strength of the blends was investigated.
当裂纹扩展至拉伸过载区，断口表面则呈现明显的冲击断裂特征。
The fatigue fracture surface exhibits obviously impact facture characterization, when the crack propagates into overload tensile zone.
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