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The Effect of Self-Healing Agent Fraction on CFRP Mechanical Behavior: Statistical Analysis Approach
Yuri Pereira Chuves,Francisco Maciel Monticeli,Allana Azevedo do Nascimento,Ana Paula Cysne Barbosa,Herman Jacobus Cornelis Voorwald,Maria Odila Hilário Cioffi 한국섬유공학회 2023 Fibers and polymers Vol.24 No.2
The self-healing application in structural composites aims to recover component properties, control damage propagation,and increase component life. In this way, this study proposes to characterize and predict the inter-laminar shear behaviorof polymer composites (5HS carbon/epoxy) with different fractions of self-healing agent. In addition, this work aims tomeasure the influence of self-healing content on the mechanical response. The ANOVA evidenced that the healing agentfraction influences on mechanical properties more than the internal dispersion for the same laminate before the healingcycle. Weibull distribution evidenced a linear decrease in shear stresses for higher EMAA (poly(ethylene-co-methacrylicacid)) content, regarding stiffness decrease as a response to ductile thermoplastic behavior. Ineffective healing effects wereobserved for the translaminar and intra-laminar damage, once most particles were concentrated in inter-laminar sections. However, the healing efficiency reached an average of 62% for shear stress and 106% for toughness behavior, provided bythe closing shear cracks, i.e., up to 57% of reduced area related to the initial crack size. The predictive approach beforeand after healing action in the mechanical behavior provides the appropriate self-healing level to meet the specific projectrequirements, thus saving time and cost.
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