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Enhancing Carbon Fiber-Reinforced Polymers' Performance and Reparability Through Core-Shell Rubber Modification and

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Core-shell rubber (CSR) particles enhance carbon fiber-reinforced polymer (CFRP) toughness and impact resistance. CSR-modified patches effectively repair damaged CFRPs, restoring structural integrity and improving energy absorption for durable composite applications.

Keywords:
CFRPscore–shell rubberfracture toughnessimpact modifierspatch repair

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Area of Science:

  • Materials Science
  • Polymer Engineering
  • Composite Materials

Background:

  • Carbon fiber-reinforced polymers (CFRPs) offer high performance but suffer from brittleness and impact damage susceptibility.
  • Developing effective impact modifiers and repair strategies is crucial for enhancing CFRP durability and extending service life.

Purpose of the Study:

  • To investigate the impact modification of CFRPs using core-shell rubber (CSR) particles.
  • To evaluate the effectiveness of CSR-containing patch repairs for damaged CFRP panels.

Main Methods:

  • Mechanical testing (flexural, tensile, impact, fracture toughness) of reference and CSR-modified CFRPs.
  • Fracture surface analysis using Scanning Electron Microscopy (SEM).
  • Drop-weight impact tests and ultrasonic C-scans for assessing patch repair efficacy on damaged panels.

Main Results:

  • CSR modification significantly increased impact strength by 50% and Mode I fracture energy by 181%.
  • Slight reductions in flexural and tensile strengths were noted due to CSR particle softening.
  • Equal-thickness CSR patches restored structural integrity and boosted energy absorption by 37% in repaired panels.
  • Non-destructive testing confirmed reduced damage in repaired CSR-modified CFRPs.

Conclusions:

  • CSR particles are effective impact modifiers for CFRPs, enhancing damage tolerance and energy absorption.
  • CSR-containing patch repairs can successfully restore and improve the performance of damaged CFRP structures.
  • These advancements are vital for applications requiring high durability, such as aerospace and automotive components.