Perpustakaan Digital ITB

The usage of composite material have been increasing the last decades, especially in industries such as aerospace and automotive. However, one of the concerns regarding the usage of composite is its susceptibility to damage due to low velocity impact (LVI). LVI can cause a barely visible impact damage (BVID) which can compromise the compression strength significantly. In this reseach, finite element method (FEM) models based on Kirchoff’s Plate Theory, Hashin-Rottem damage modelling, and Benzggagh-Kenane fracture criterion are proposed to simulate the low velocity impact and compression after impact (CAI) on composite laminate. The models are modelled and validated with existing experiment data. The FEM model is used to find the relationship between the impact energy and laminate orientations on the CAI strength. The developed model could predict the composite behaviour considerably well. The LVI impact energy is found to have an inverse power law relationship with the CAI strength. The laminates with more 0 degree plies tends to have higher compression strength while laminate with ±45 tends to have better damage resistance.