摘要
为研究不均匀分布特性对I型断裂行为的影响,以玻璃纤维增强复材(GFRP)双悬臂梁(DCB)试件为研究对象,开展断裂韧性试验及相应的数值仿真分析。研究结果表明:DCB试件的裂纹长度偏差lv与能量释放率不均匀分布系数β均随裂纹长度的增加而发生改变;利用规范中三种经典梁模型确定传统DCB试件I型断裂韧性时,需计入lv与β的影响。
In order to study the effect of curved delamination front on the fracture behavior of DCB specimen under mode-I loading,the GFRP DCB specimen with a straight pre-crack front was investigated experimentally and numerically.The results indicate that the visual deviation lvand the non-uniformity coefficientβvaried as the crack length increased.The effect of the visual deviation lvand the non-uniformity coefficientβshould be incorporated,when the three classical methods in the existing codes were used to determine the initiation toughness and propagation toughness of DCB specimen.
作者
蒋正文
万水
方志
JIANG Zhengwen;WAN Shui;FANG Zhi(College of Civil Engineering,Hunan University,Changsha410082,China;Key Laboratory for Damage Diagnosis of Engineering Structures of Hunan Province,Changsha410082,China;School of Transportation,Southeast University,Nanjing210096,China;Key Laboratory for Wind and Bridge Engineering of Hunan Province,Changsha410082,China)
出处
《工业建筑》
CSCD
北大核心
2019年第9期190-195,123,共7页
Industrial Construction
关键词
复合材料
双悬臂梁试件
不均匀分布特性
Ⅰ型断裂韧性
composites fiber reinforced polymer
DCB specimen
non-uniform distribution
mode-I fracture toughness
