Stress concentration at the hole edge of open-hole glass fiber reinforced pultrusion plate

doi:10.19936/j.cnki.2096-8000.20230228.016

Abstract

Abstract: In order to predict the stress concentration effect of open-hole glass fiber reinforced pultrusion plate in wind turbine blade, the tension behaviors for different hole diameters are studied by test, theoretical analysis and finite element analysis. First, the tensile strength of glass fiber pultrusion plates with different hole diameters are tested. Then, the analytical expression of stress concentration coefficient for open-hole plate under average stress criteria is presented. After that, the finite element models of open-hole pultrusion plate are established in commercial finite element software ANSYS. The effect of mesh size on the stress distribution for hole edge is studied. Finally, the results using different methods are compared and discussed. It is found that as the diameter of open hole increases, the stress concentration coefficient of the open-hole plate will increase and the strength will decrease. The experiment results of stress concentration factor are smaller than the theoretical values. The deviation of stress distribution and stress concentration coefficient at the hole edge obtained by finite element solution and analytical solution is small, and the deviation of stress concentration coefficient is less than 3%.

Key words: open-hole glass fiber pultrusion plate, stress concentration, finite element analysis, analytical method, average stress criteria, composites

CLC Number:

TB332

LU Xiaofeng, LI Zhanying, YANG Yurong, XU Jun. Stress concentration at the hole edge of open-hole glass fiber reinforced pultrusion plate[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(2): 122-125.

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