The Effect of Self-Healing Agent Fraction on CFRP Mechanical Behavior: Statistical Analysis Approach

Author(s)

Chuves, Yuri Pereira ; Monticeli, Francisco Maciel ; do Nascimento, Allana Azevedo ; Barbosa, Ana Paula Cysne ; Voorwald, Herman Jacobus Cornelis ; Cioffi, Maria Odila Hilario

• Document type: Journal article
• Source: FIBERS AND POLYMERS; v. 24, n. 2, p. 12-pg., 2023-02-20.

Abstract

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 behavior of polymer composites (5HS carbon/epoxy) with different fractions of self-healing agent. In addition, this work aims to measure the influence of self-healing content on the mechanical response. The ANOVA evidenced that the healing agent fraction influences on mechanical properties more than the internal dispersion for the same laminate before the healing cycle. Weibull distribution evidenced a linear decrease in shear stresses for higher EMAA (poly(ethylene-co-methacrylic acid)) content, regarding stiffness decrease as a response to ductile thermoplastic behavior. Ineffective healing effects were observed 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 by the closing shear cracks, i.e., up to 57% of reduced area related to the initial crack size. The predictive approach before and after healing action in the mechanical behavior provides the appropriate self-healing level to meet the specific project requirements, thus saving time and cost. (AU)

• FAPESP's process: 17/10606-4 - Fatigue in hybrid composites processed via RTM: hybrid interface influence in delamination modes I and II
• Grantee: Francisco Maciel Monticeli
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 20/09422-9 - Influence of different self-healing fractions on the mechanical behavior of 5HS/Epoxy polymer composite
• Grantee: Yuri Pereira Chuves
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 21/05706-5 - Fatigue in polymer composite reinforced with carbon fiber: characterization of intra and interlaminar damage propagation
• Grantee: Francisco Maciel Monticeli
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/04412-8 - Composites processed by RTM using self-healing agents dispersed into the matrix: viscoelastic behavior and interlaminar fracture in mode II
• Grantee: Maria Odila Hilário Cioffi
• Support Opportunities: Scholarships abroad - Research