Uncertainty analysis of tensile strength of open-hole laminates based on RVE modeling

doi:10.19936/j.cnki.2096-8000.20260728.006

Abstract

Abstract: Aiming at the problem of dispersion of mechanical properties of open-hole laminates due to fiber and pore inhomogeneity during material preparation, this study develops an algorithm for generating a three-phase RVE model with randomly distributed fibers-substrate-pores, performs macro- and fine-scale progressive damage analyses of open-hole laminates, and solves for the sensitivities of the dimensions of the fibers and pores (R_f, R_v) and the volume fractions (V_f, V_v) by using a polynomial chaos expansion method, to realize theuncertainty prediction of tensile strength of open-hole laminates.The analytical results show that under the combined effect of V_f decrease and V_v increase, the maximum decrease in the elastic performance parameters of the open pore plywood is 29.47%, and the ultimate load decrease is 14.51%, which are significantly more than the corresponding maximum decreases caused by the changes of a single parameter (V_f or V_v) by 19.5% and 10.94%, respectively. For the failure displacements of open-hole laminates, the parameter influences were ranked as V_f > R_f > V_v > R_v; for the ultimate loads of open-hole laminates, the parameter influences were ranked as V_v > V_f > R_v > R_f. Which showed that the effects of the changes in volume fraction were greater than the effects of the changes in dimensions.

Key words: open-hole laminate, RVE modeling, mechanical properties, polynomial chaos expansion, uncertainty

CLC Number:

TB332

LI Enqing, LIU Xinglong, SONG Ting, LU Xiang. Uncertainty analysis of tensile strength of open-hole laminates based on RVE modeling[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(7): 44-56.

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