Al/CFRP多層積層ハイブリッド複合材料のAE特性

概要

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The acoustic emission responses (AE) of the multi-layered hybrid composite made of many thin aluminum sheet and CFRP sheets were studied under three conditions of uniaxial tensile, unloading -reloading and loading-holding test. The failure processes were monitored and identified by the AE. The mechanisms of hybrid effect which had been found in the previous paper were clarified on the basis of AE date obtained under the condition of uniaxial tensile test. By analysing AE date obtained under each condition it was also found that there was a stress range in which a few cracks were generated in the matrix but did not propagate. This fact made it possible to decide an allowable stress for the tests material by the AE technique. As the stress in the specimen increased more than the allowable stress during loading-holding testing a large bmount of AE events were generated suddenly. It was thought that they resulted from delaminating of aluminum and CFRP laminate and that failure mechanism controlling the uniaxial testing changed into the other one which includes a delamination mechanism.
社団法人日本材料学会の論文
1990-10-15