摘要
文中采用CT（Compact Tension）试样对MDYB-3有机玻璃在-50℃～90℃范围内进行了裂纹扩展试验研究。基于金属裂纹扩展公式，结合有机玻璃疲劳裂纹扩展特性，得到了描述有机玻璃裂纹扩展行为的公式。将其与有机玻璃在不同温度下的试验结果对比，发现得到的公式能够较完整地描述有机玻璃疲劳裂纹在各个阶段的扩展行为。
In the present study, fatigue crack growth test of PMMA （MDYB-3） was carried out with the temperature range from -50℃ to 90℃ and at frequency 1 Hz by the compact tension sample. Based on the fatigue crack propagation rates of metal, the fatigue crack propagation rates of PMMA were been put forward by considering the fatigue behavior of PMMA. The following experimental results under different temperatures show that the formula can be well used to describe the fatigue crack propagation behavior of PMMA at every stage.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第1期90-93,共4页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(10472094)
863资助项目(2006AA04Z401)
关键词
有机玻璃
疲劳裂纹扩展
门槛值
应力强度因子
断裂韧性
温度
Polyethylene Methacrylate （PMMA）
fatigue crack propagation
threshold
stress intensity factor
fracture toughness
temperature
