Research on interlaminar impact resistance of self-healing EMAA fiber bundle suture composites

doi:10.19936/j.cnki.2096-8000.20231028.004

Abstract

Abstract: In order to overcome the disadvantage of insufficient interlaminar fracture toughness of carbon fiber reinforced resin matrix composites, low impact damage tolerance and difficult repair after impact damage, thermoplastic resin fiber EMAA suture composite specimens were prepared by suture and phased co-curing process, and the impact properties before and after self-healing were studied. The layered prepreg was sutured with thermoplastic resin fiber EMAA along the thickness direction, a three-dimensional self-healing network was established internally, and the impact specimens were processed through phased heating and pressure curing. The primary impact test and the impact test after self-healing of the suture EMAA composite laminate were carried out with different energies and the healing test of the suture EMAA composite laminate specimen damaged after impact was carried out. The damage of unrepaired laminates and self-healing composite laminates under different impact energy and the impact resistance of self-healing composite laminates before and after repair were studied. The results show that under the same impact energy, the damage loss energy of sutured EMAA composite laminate is 17.66% lower than that of unsutured EMAA composite laminate, and the damage is smaller and the laminate has better impact resistance. The lowest repair efficiency of laminates after self-healing is 97.96%, which better realizes the self-healing function of materials.

Key words: self-healing, suture, EMAA, impact resistance, composites

CLC Number:

TB332

GE Chaokun, TIE Ying, ZHANG Zhenzhen, YANG Weiya. Research on interlaminar impact resistance of self-healing EMAA fiber bundle suture composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(10): 23-31.

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