A unified direct method for ratchet and fatigue analysis of structures subjected to arbitrary cyclic thermal-mechanical load histories

Zhiyuan Ma, Xiaoxiao Wang, Haofeng Chen, Fu-Zhen Xuan, Yinghua Liu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
2 Downloads (Pure)

Abstract

In this paper, the distinction between material ratchetting and structural ratchetting is clarified, and the concept of constant life diagram is extended to depict low cycle fatigue life boundary in structural design. To provide a novel one-stop solution for structural fatigue and ratchetting problems, a Unified Procedure for Fatigue and Ratchet Analysis (UPFRA) has been proposed. The UPFRA has been successfully applied to two different engineering structures considering complex geometry and temperature-dependent material properties. By comparing the results with ABAQUS step-by-step inelastic analysis, the UPFRA has been verified to be a robust engineering tool with great accuracy, usability, and efficiency.
Original languageEnglish
Article number106190
JournalInternational Journal of Mechanical Sciences
Volume194
Early online date10 Nov 2020
DOIs
Publication statusPublished - 15 Mar 2021

Keywords

  • ratchet
  • low cycle fatigue
  • direct methods
  • linear matching method
  • unified procedure for fatigue and ratchet analysis

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