内应变
The internal strain of composite laminates during a constant stress amplitude fatigue testing process was monitored with fiber Bragg gratings ( FBGs) as a fatigue indicator to reveal Young's modulus decrease of the specimen, which is a direct index of damage.
采用光纤光栅(FBGs)作为疲劳计监测了复合材料层板在等应力幅疲劳测试过程中的应变变化,该变化反映了复合材料在疲劳过程中刚度的衰减规律。
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