EFFECTS OF FIBER WAVINESS ON THE STIFFNESS OF COMPOSITE LAMINATES

Abstract

Abstract: The effects of uniform waviness on the stiffness of composite laminates have been investigated numerically and experimentally. The VARI process is employed to manufacture the specimens with fiber waviness,and the compression test is conducted to obtain the major Young's modulus and Poisson's ratio. Based on the finite element analysis software ANSYS, the laminates with fiber waviness is simulated and the stiffness is predicted for different fiber volume contents and waviness ratios. The results show that the fiber waviness has significant influence on the stiffness of composite laminates. Especially the E_x has a great decrease. The shear failure is prone to initiate at the position of the maximum fiber off-axis angle for most specimens. Furthermore,with the increase of waviness ratio, the fiber volume content has little influence on the variation trend of stiffness. The predictions agree well with the experimental data.

Key words: fiber waviness, finite element, fiber off-axis angle, stiffness

CLC Number:

TB332

WU Wei-qing, ZHU Jun, WANG Ji-hui, SHU Ming-jie. EFFECTS OF FIBER WAVINESS ON THE STIFFNESS OF COMPOSITE LAMINATES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2015, 0(12): 41-47.

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