Numerical Analysis of Ti/PC/APC-2/Kevlar Hybrid Composite Laminates after High-Velocity Impact

• Main Authors: Shang-peng Chen, 陳尚鵬
• Other Authors: Ming-Hwa Jen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/41051446286581954819

碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 102 === This thesis aims to investigate the ballistic limit and failure mechanism of Ti/PC(Polycarbonate)/APC-2(AS4/PEEK)/Kevlar hybrid composite laminates after high velocity impact. The ANSYS/LS-DYNA software was used to simulate the high-velocity impact process. The analysis includes using different lay-ups and the thickness of material, projectile velocity and kinetic energy changing, the internal energy of laminate, and the difference of the failure mode by high velocity impact in different laminates. The work is divided into two parts: first is the introduction of simulation process by using ANSYS/LS-DYNA. The ballistic limit of Ti/PC composite laminates with different lay-ups and thicknesses of PC were obtained. Then, adding APC-2/Kevlar to the laminates and using different lay-ups to obtain its ballistic limits. It is to establish a laminates which can against the reality ballistic high velocity impact. Second, the ballistic limit of composite laminate were discussed and analyzed by multiple ways. From the simulations, the composite laminates have higher ballistic limits when using Ti/PC alternating stacking sequence. The major reason for resisting impact for Ti/PC composites is Ti layer because the thickness of PC in laminates is too thin. In other words, the composite laminates with 4,6mm thicknesses PC layers have better impact resistance. Using Ti/PC/APC-2/Kevlar the stack sequence will have better impact resistance for composite laminates. [Ti/PC/APC-2/Kevlar/(Ti/Kevlar2/PC)5 ]s and [Ti/PC/APC-2/Kevlar/(Ti/Kevlar2/PC)6 ]s composite laminates can resist impact velocity higher than 500m/s. [Ti/PC/APC-2/Kevlar/(Ti/Kevlar2/PC)6 ]s laminates have much better impact resistance for thick laminates.