Fractional calculus-based creep model of HFRP double lap joint subjected to NaCl solution

• DOI: 10.1016/j.polymertesting.2023.108166
• Publication Date: 2023-08-01T15:25:45Z
• Authors: Xiaomeng Wang; Juan Zhang; Qian Wu; Michal Petrů
• Keywords: Lap joint; Fillet (mechanics); Transfer molding

Epoxy adhesion is one of the major joint technologies FRP (Fiber Reinforced Polymer) and its long-term performance has been proven a key to practical engineering application. In this paper, effect NaCl solution on creep deformation HFRP (Hybrid Fiber double lap joints studied. To simplify behavior capturing process, fractional calculus-based model with concise mathematical expression few fitting parameters proposed, eliminating need for complex series-parallel spring-dashpot combinations. The results show excellent agreement test data, indicating effectiveness proposed model. Creep leads obvious redistribution stress strain adhesive joint. Stress concentration can be effectively reduced by increasing thickness or using fillet.