Effect of perforated hole and groove size on mechanical properties of core material

doi:10.19936/j.cnki.2096-8000.20220928.009

Abstract

Abstract: Sandwich structures are widely used in wind turbine blades. Improving the mechanical properties of core material is beneficial to the strength, stiffness and stability of sandwich structures. In order to study the effect of the dimensions of perforated hole and groove on the mechanical properties of the core after resin infusion, a three-dimensional solid finite element model of the core was established, and the model was validated by the experimental results. The results show that increasing the hole diameter and decreasing the groove spacing are the most effective ways to improve core modulus, and increasing the groove width and depth has little contribution to the core modulus. In consideration of minimal cost of core after resin infusion, increasing of the hole diameter is the optimal method to improve the compressive and tensile modulus, and decreasing the groove spacing on both sides is the optimal method to improve the shear modulus.

Key words: core material, finite element, elastic modulus, parameter analysis, cost coefficient

CLC Number:

TB332

JI Xiang, QIN Zhi-wen, FENG Wei, SONG Xiao-fei, FU Shou-jun, WANG Guo-fu. Effect of perforated hole and groove size on mechanical properties of core material[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(9): 62-68.

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