定向有机玻璃的拉伸断裂行为研究

Investigation of Tensile Fracture Behavior of Directional PMMA

研究了定向有机玻璃在不同温度下的拉伸断裂行为,探讨了定向有机玻璃拉伸行为与温度的关系。结果表明:随温度升高,定向有机玻璃的拉伸强度和拉伸模量降低,断裂伸长率增加,材料由刚而脆变得软而韧。不同温度下定向有机玻璃的断裂特征差别显著,在23℃时分层断裂特征最明显,在-55℃时主要为礼花状放射特征,而在80℃时主要为韧性断裂特征。

Tensile fracture behavior of directional PMMA at different temperature is investigated. And the relationship between tensile behavior and temperature is discussed. The result shows with the temperature increasing, tensile strength and modulus decreases but elongation increase and material properties change from rigidity to flexibility. Fracture characteristics of directional PMMA are obviously different at different temperature. Frauture faces exhibit delamination features at 23℃ ,fireworks fractures at -55℃ and flexibility features at 80℃.