摘要
分析了具有同样厚度、不同宽度的带侧槽（ｓｉｄｅｇｒｏｏｖｅ）ＨＹ－１３０钢三点弯曲深裂纹试样的Ｊ－Ｒ曲线及能量耗散率ｄＷｄｉｓ／Ｂｄａ的变化规律．发现了裂纹在有限载荷下扩展相同长度时，愈宽的试样的Ｒ曲线趋于愈低的位置．并对此进行了分析．并再次论证了ｄＷｄｉｓ／Ｂｄａ是一个反映材料断裂韧性的有意义的参量．
The behaviors of J-R curves and dissipation rates for side grooved deep notch three point bend test pieces of HY-130 steel with the same thickness but different widths have been studied. Crack growth occurs at limit load and the R-curves follow the pattern that wider pieces give lower curves. Analysis is made and argued that dWdis./Bda is a parameter to reflect the fracture toughness of materials.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1994年第4期482-488,共7页
Journal of Beijing University of Aeronautics and Astronautics
关键词
断裂韧性
钢
实验
侧槽
fracture toughness
steels
experiment
side groove
