STUDY ON THE LOW-SPEED IMPACT PERFORMANCE AND RESIDUAL STRENGTH AFTER IMPACT OF COMPOSITE SANDWICH STRUCTURE WITH DIFFERENT LAYUP

Abstract

Abstract: In this paper, three kinds of carbon fiber sandwich structures with different layup face sheets were prepared by using carbon fiber plain weave prepreg, unidirectional prepreg and Balsa. The low-speed impact with impact energy of 5 J, 15 J, 25 J, 35 J, 45 J and post-impact compression test of these three composite sandwich structures were carried out to study the effect of different laminate types on the low-speed impact properties and residual compressive strength of sandwich panels. The results indicate that stacking parameters can prominently influence the damage failure modes of composites sandwich structure when subjected to low-speed impact and post-impact compression. The low-speed impact damage area, pit depth, damage area, impact response curve and the compressive strength reduction ratio after impact of the three sandwich panels were remarkably different. Among the three laying methods, the specimens of unidirectional carbon fiber prepreg with quasi isotropic layer exhibit high impact load resistance.

Key words: carbon fiber, sandwich, impact damage, residual compressive strength, composites

CLC Number:

TB332

SUN Zi-heng, WANG Ji-hui, NI Ai-qing, CHEN Hong-da. STUDY ON THE LOW-SPEED IMPACT PERFORMANCE AND RESIDUAL STRENGTH AFTER IMPACT OF COMPOSITE SANDWICH STRUCTURE WITH DIFFERENT LAYUP[J]. Composites Science and Engineering, 2020, 0(11): 102-110.

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