Effects of specimen dimensions and impact energy on energy absorption and damage of glass/epoxy composite plates

KARAKUZU R., Algan B., DENİZ M. E.

MATERIALS TESTING, vol.61, no.3, pp.231-238, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 61 Issue: 3
  • Publication Date: 2019
  • Doi Number: 10.3139/120.111309
  • Journal Name: MATERIALS TESTING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.231-238
  • Keywords: Absorbed energy, impact damage, specimen dimension, laminated composite, LOW-VELOCITY IMPACT, STRENGTH, PREDICTION, BEHAVIOR
  • Dokuz Eylül University Affiliated: Yes

Abstract

In this study, the impact response of laminated composite plates of various specimen dimensions under various impact energies has been investigated, experimentally and numerically. Glass/epoxy composites with [0(2)/90(2)/0(2)/90(2)]s orientations were manufactured by the hand layup technique. Low velocity impact tests were conducted using a CEAST-Fractovis Plus impact test machine for specimens with net impact areas; SQR76 (square with 76 mm edge), SQR150 (square with 150 mm edge) and CIR76 (circle with diameter of 76 mm). Numerical analysis was also carried out via 3DIMPACT transient finite element code including matrix cracking and impact-induced delamination criteria. Absorbed energy and the damage size of specimens were investigated for various impact energies. Delamination areas obtained by finite element were in good agreement with those experimentally obtained up to 50 J of impact energy.