Research on the Adhesive Strength of Different Bonding Structures for Modular Wind Turbine Blades
Junpeng Yang, Afang Jin, Junhan Li, Fengrong Li
TL;DR
This study examines different adhesive joint designs for modular wind turbine blades to improve their strength and durability.
Contribution
The study identifies the double-slope joint as the most effective adhesive structure for modular wind turbine blades.
Findings
The double-slope joint achieved the highest peak load of 1017.26 N and delayed damage evolution.
Numerical simulations showed the double-slope joint had the highest predicted peak loads in flapwise and edgewise loading.
The findings provide theoretical support for improving blade structural design and adhesive joint performance.
Abstract
To address the manufacturing and transportation challenges of large wind turbine blades, adhesive joints in modular blades have become a research focus. This study investigates six typical adhesive joint configurations for CFRP laminates using quasi-static three-point bending experiments and cohesive-zone finite element simulations. The adhesive interface is modeled with a bilinear traction–separation law using zero-thickness cohesive elements to capture damage initiation and propagation. Among the six designs, the double-slope joint exhibits the best static performance, achieving the highest peak load of 1017.26 N and showing delayed damage evolution. The superiority of the double-slope design is further examined at the blade level via a numerical cantilever model of equal-section modular blade segments under flapwise and edgewise loading. The predicted peak loads reach 9.82 × 107 N…
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Taxonomy
TopicsMechanical Behavior of Composites · Wind Energy Research and Development · Cellular and Composite Structures