Influence of multiple delaminations on tensile performance of wind turbine blade spar caps
XIN Wen
ZHOU Bo
LI Hui
GUO Zhihui
ZHANG Lixin
Abstract：The influence of different multi-delamination forms on the tensile strength of blade spar cap laminates was studied.Static tensile tests were conducted on laminates with single and multiple delaminations.The continuous damage model(CDM)and cohesive zone model(CZM)were used to analyze the damage process and failure mode.The numerical results showed good agreement with test values,with an overall error rate below 7%.A numerical model of 1.5 MW-40.3 m blade spar cap equivalent laminates was established to predict the effect of different types of multi-delamination on the tensile strength.The results show that the arrangement,maximum area,and step difference of delaminations all have an impact on tensile strength.The tensile strength of triangular multi-delamination is higher than that of inverted triangular multi-delamination laminates,and the maximum delamination near the surface greatly affects the tensile failure load.
Keywords：Multiple delaminationsWind turbine bladeSpar capNumerical simulationTensile strength
Publication Date：2025-10-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 96-104 )