【摘要】 采用尖槽式中心切口圆盘试件,在分离式霍布金森压杆试验装置上对有机玻璃纯Ⅰ型和纯Ⅱ型加载条件下的动态断裂行为进行了实验研究。结果表明,加载速率对有机玻璃的断裂行为有显著的影响,有机玻璃纯Ⅰ型和纯Ⅱ型断裂韧度的测试结果均表现出明显的加载速率相关性,且随着加载速率的增加而增大。更多还原

【Abstract】 For polymethyl methacrylate(PMMA),dynamic fracture tests were conducted by using central notched circular disk specimen in the split Hopkinson pressure bar.The effect of loading rate on the pure mode-Ⅰ and pure mode-Ⅱ fracture behaviors of the PMMA was investigated.The experimental results indicate that the PMMA is a rate-dependent material.The measured values of both mode-Ⅰ and mode-Ⅱ fracture toughness increase with the increase of loading rate.更多还原