摘要
对复合材料Ⅱ型层间断裂韧性试验方法进行了研究。研究结果表明：用ＥＮＦ方法测定ＧⅡＣ时，裂纹长度应在０．４≤ａ／Ｌ≤０．８５范围内选取；对应于Ⅰ型裂纹前缘和未预裂的裂纹前缘的ＧⅡＣ大于由Ⅱ型裂纹前缘得到的ＧⅡＣ；疲劳预制出的Ⅱ型裂纹前缘和静态预制出的裂纹前缘得出相同的ＧⅡＣ结果；试件尺寸和加载速率对试验结果没有影响。
In this paper,test method of mode Ⅱ interlaminar fracture toughness of composites was studied. The results indicated that crack length should be selected in the range of 0.4≤a/L≤0.85 when using ENF method to determine GⅡC,GⅡC data obtained from crack tip precrecked with mode Ⅰloading and unprecracked crack tip are great than that from crack tip precracked with mode Ⅱ loading,the crack tips precracked by fatigue and static loading induce same GⅡC results,and the specimen geometry and loading rate have no influence on ENF test results.
出处
《航空材料学报》
EI
CAS
CSCD
1997年第4期54-61,共8页
Journal of Aeronautical Materials
关键词
复合材料
II型断裂
断裂韧性
分层
composites,mode Ⅱ fracture,fracture toughness,delamination
