Abstract: In the compression tests of glass fiber composite materials which have waves, the damage evolution of glass fiber composites was studied by using the acoustic emission (AE) and digital image correlation (DIC) method. The relationship between compressive mechanical response behavior of composite materials and damage deformation field information or acoustic emission characteristic parameters was analyzed by collecting acoustic emission signals and damage deformation field information during compression test. The results show that waves have serious influence to mechanical property of composite materials. By analyzing acoustic emission signals, it is found that, as waves' ratio of width and height decrease, mechanical property of composite materials becomes worse; and in the same ratio of width and height, as waves' height increase, mechanical property of composite materials is worse. By analyzing strain field and displacement field from DIC, it is found that, in the same load increment, the maximum strain increase and the composite materials which have a wave with higher ratio of width and height have a larger increment of maximum strain. The place which is close to the middle of composite materials has a larger horizontal displacement. However, loading direction displacement is related to creak. The place which is close to creak has a larger loading direction displacement. It reflects clearly damage and deformation characteristic of composite materials by using displacement field and strain field.

Key words: composite materials, waves, acoustic emission, digital image correlation