Comparative assessment of analytical and numerical frameworks for shear-dominant interlaminar delamination in pultruded CFRP spar caps

Q: What does this research mean for the field?

The Cohesive Zone Model (CZM) provides the best balance of stability and computational cost for simulating shear-dominant interlaminar delamination in pultruded CFRP spar caps compared to VCCT and XFEM-VCCT. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Geunsu Joo; Young Cheol Kim; S W Kim; Mungyu Jeong; Ji-Hoon Kim; Jisang Park

doi:10.1016/j.compstruct.2026.120517

May 1, 2026Composite StructuresOpen Access

Comparative assessment of analytical and numerical frameworks for shear-dominant interlaminar delamination in pultruded CFRP spar caps

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Key Points

This assessment aims to evaluate the effectiveness of different analytical and numerical frameworks for predicting shear-dominant interlaminar delamination in CFRP spar caps.
Conducted End-Notched Flexure tests to characterize Mode II fracture in pultruded CFRP spar caps.
Compared Virtual Crack Closure Technique (VCCT) and Cohesive Zone Model (CZM) in delamination predictions.
Assessed mesh sensitivity and crack propagation behavior using XFEM-VCCT with varying aspect ratios.
VCCT matched theory but delayed crack initiation compared to CZM.
CZM provided smooth softening and stable crack propagation, demonstrating the best stability-to-cost balance.
Both VCCT and CZM displayed low sensitivity to mesh refinement, while XFEM-VCCT performance depended on crack-front aspect ratio.

Implication

Comparative assessment reveals cohesive zone model excels in delamination stability in CFRP spar caps, suggesting optimal framework choice.

Abstract

• End-Notched Flexure tests characterize Mode II fracture in pultruded CFRP spar-caps. • Virtual Crack Closure Technique (VCCT) matches theory but delays crack initiation. • Cohesive Zone Model (CZM) reproduces smooth softening and stable crack propagation. • VCCT/CZM show low mesh sensitivity; XFEM–VCCT depends on crack-front aspect ratio. • With identical crack-tip refinement, CZM offers the best stability-to-cost balance.

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Cite This Study

Joo et al. (2026) studied this question.

synapsesocial.com/papers/6a1d226d02fbce9130638303 https://doi.org/10.1016/j.compstruct.2026.120517

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Comparative assessment of analytical and numerical frameworks for shear-dominant interlaminar delamination in pultruded CFRP spar caps

Key Points

Implication

Abstract

Discussion

Cite This Study

Comparative assessment of analytical and numerical frameworks for shear-dominant interlaminar delamination in pultruded CFRP spar caps

Key Points

Implication

Abstract

Discussion

Cite This Study

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