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Koord, Josef
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Publications (6/6 displayed)
- 2024Design methodology for highly loaded composite bolted joints with local metal hybridization at low temperature
- 2024Bolt-bearing behavior of hybrid CFRP-steel laminates at low temperaturecitations
- 2023Anisotropic flexure hinges: Manufacturing and mechanical characterization forapplication in pressure-actuated morphing structures
- 2023Comparison of Continuum Shell and Solid Element-Based Modeling Strategies for Mesoscale Progressive Damage Analysis of Fiber Compositescitations
- 2023Anisotropic flexure hinges: Manufacturing and mechanical characterization for application in pressure-actuated morphing structurescitations
- 2023Effect of low temperature on mode I and mode II interlaminar fracture toughness of CFRP-steel hybrid laminatescitations
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article
Bolt-bearing behavior of hybrid CFRP-steel laminates at low temperature
Abstract
Hybrdization of CFRP with steel sheets enhances bolt-bearing performance. At room temperature, bearing strength is reported to increase while minimum edge and width distances decrease. To assess if this advantage persists under low temperature conditions, bolt-bearing tests following AITM 1-0009 are conducted at 23°C and -55°C. Various monolithic and hybrid configurations with different metal content and joint geometries are examined. Furthermore, ultrasound scanning and optical microscopy of the fracture plane is conducted. Hybridizing composites notably improves bearing capacity. However, the reinforcement effect is less pronounced at low temperatures compared to room temperature. The reduction in minimum edge and width distances with metal hybridization largely depends on the composite ply stacking, challenging general literature recommendations. Regarding damage mechanisms in the joints, fractography indicates that introduction of steel sheets relieves composite plies, isolates damage, and enhances load-bearing capacity through additional bending stiffness and significant plastic deformation of the metal.