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A quasi-3D reduced-order model with improved complex potentials for interfacial shear stress in scarf-repaired composites
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DOI：10.1016/j.ijsolstr.2026.114064.png)
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Abstract
En 中文
This study addresses the challenge of predicting interfacial shear stress distribution in adhesively bonded scarf-repaired composites subjected to far-field in-plane loading. A quasi-3D semi-analytical reduced-order model is developed by combining orthotropic complex potentials for the in-plane dominant field with a third-order through-thickness enrichment for leading-order interface shear shear effects. The bonded scarf region is discretized into concentric annular subdomains to represent radial stiffness gradation, while interface equilibrium and displacement compatibility are enforced in a weighted least-squares sense. Direct comparisons with 3D finite element simulations show that the proposed model predicts the dominant interfacial shear-transfer pattern with good accuracy for thin laminates, small scarf angles, and thin adhesive layers, and the relative error of peak interfacial shear stress remains below 6.1%. The framework is intended for membrane/shear-dominated load transfer rather than general transverse loading, bending-dominated response, or full local 3D field reconstruction.
Keywords:
interfacial shear stress
scarf-repaired composites
quasi-3D reduced-order model
complex potentials
adhesive bonding
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3.8
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1.1W
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3.1W
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