Experimental and theoretical analysis of the response for 316L stainless steel tubes under pure bending creep and relaxation

Kuo Long Lee, Wen-Fung Pan

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the response sharp-notched 316L stainless steel tubes subjected to pure bending creep and relaxation is experimentally and theoretically studied. Pure bending creep means to bend the specimen to a desired moment and hold that moment for a period of time; pure bending relaxation means to bend the specimen to a desired curvature and hold that curvature for a period of time. From the experimental result for pure bending creep, the curvature and ovalization increase with time until the tube buckles. A higher desired moment leads to higher curvature and ovalization. From the experimental result for pure bending relaxation, the bending moment rapidly decreases with time and becomes a steady value after all. As for the ovalization, the amount increases with time and gradually becomes a steady value. Due to the constant ovalization caused by the constant curvature under pure bending relaxation, the tube does not buckle. Finally, the formulation proposed Lee and Pan [1] is modified for simulating the initial and second stages of the creep curvature-time relationship under pure bending creep, and relaxation moment-time relationship under pure bending relaxation for sharp-notched 316L stainless steel tubes. Through comparing with the experimental finding, the theoretical analysis can reasonably describe the experimental result.

Original languageEnglish
Pages (from-to)163-170
Number of pages8
JournalJournal of Technology
Volume30
Issue number3
Publication statusPublished - 2015 Jan 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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