Effect of two impact distances on impact damage and residual compressive strength of CFRP laminates

doi:10.19936/j.cnki.2096-8000.20231228.002

Abstract

Abstract: In order to study the influence of pre-damage impact on the secondary impact and post-impact compression behavior of composite materials, pre-damage impact test, secondary impact test and post-impact compression test of composite laminates were carried out. The relationship between the distance between the pre-damage impact and the secondary impact and the impact damage and the residual compressive strength was investigated. Based on the three-dimensional Hashin criterion and progressive damage stiffness degradation scheme, a pre-damage impact-secondary impact-compression simulation model is established in ABAQUS/Explicit. The first impact damage is prefabricated into the second impact model by the method of prefabricated layered damage. The results show that the simulation results of the established model agree well with the experimental results. When the two impact distance is less than 125% of the longitudinal radius sum of the two impact damage area, the secondary impact damage extends along the fiber direction to the pre-damage impact location. When the distance between the second impact and the pre-damage impact is 150% of the longitudinal radius sum of the two damage impact areas, the residual compressive strength is the smallest and the damage to the laminated plate is the largest.

Key words: carbon fiber/epoxy resin composites, preliminary damage, two impacts, finite element analysis, compressive strength after impact

CLC Number:

TB332

XU Liang, HU Hongming, ZHOU Song, SONG Wanwan. Effect of two impact distances on impact damage and residual compressive strength of CFRP laminates[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(12): 12-18.

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