Fastening solutions on composite structures: Progressive damage analysis of a unique bolted joint design for single-lap CFRP laminate

Erbil E., Karakuzu R.

Mechanics of Advanced Materials and Structures, vol.31, no.30, pp.13373-13389, 2024 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 30
  • Publication Date: 2024
  • Doi Number: 10.1080/15376494.2023.2272240
  • Journal Name: Mechanics of Advanced Materials and Structures
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
  • Page Numbers: pp.13373-13389
  • Keywords: Carbon laminate, finite element analysis (FEA), progressive damage, plastic deformation, single-lap bolted joint
  • Dokuz Eylül University Affiliated: Yes

Abstract

This study tested a unique assembly method using single and multi-body sleeves with carbon fiber-reinforced plastic (CFRP) to improve load-carrying capacity in single-lap joints. Advanced techniques were implemented into FE code to simulate progressive material degradation behavior. Ti6-4 bolt, insert, and washers with AISI 304L sleeve joint were conceptually designed to keep bolt and nut together with less relative motion. Failure indices were reduced by 16–54%, damage initiation force was improved by 8–40%, and inter-plate clamp loss was reduced by 18% compared to the sleeveless design. Lateral load-carrying capability of joint and inter-plate clamp load significantly improved.