Understanding the static performance of composite helical springs with braided nested structures

Ling Chen, Joel Chong, Qian Jiang, Liwei Wu, Youhong Tang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
46 Downloads (Pure)

Abstract

Application of composite helical springs (CHSs) is constrained by their poor static compression performance. In this study, a novel composite helical spring with a braided nested structure (BNCHS) is proposed. The fiber volume fraction (Vf) of BNCHS with braided angle of 15° and 30° (BNCHS15° and BNCHS30°) only increases by 0.9% and 1.8% respectively comparing with that of unidirectional composite helical spring with Vf of 55% (UCHS55%). The compression experimental results show that the spring constant of BNCHS15° and BNCHS30° can reach 105.4% and 171.4% higher than that of UCHS55% respectively. The internal mechanism of significantly improving compression performance of BNCHS is revealed by using a meso model. Numerical result shows that the mises stress of BNCHS15° and BNCHS30° can be 2.43 and 3.14 times higher than that of UCHS55% respectively. Finally, the resilience and specific spring stiffness of BNCHS and steel are compared, highlighting the obvious advantage of static performance of BNCHS.

Original languageEnglish
Article number107822
Number of pages10
JournalComposites Part A: Applied Science and Manufacturing
Volume176
Early online date5 Oct 2023
DOIs
Publication statusPublished - Jan 2024

Keywords

  • A: Carbon fibres
  • C: Finite element analysis (FEA)
  • D: Failure
  • D: Mechanical testing

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