Formability limits due to local buckling in thin-walled square tubes

被引：0

作者：

Almeida, I. M. ^{[1
]}

Magrinho, J. P. ^{[1
]}

Silva, M. B. ^{[1
]}

Martins, P. A. F. ^{[1
]}

机构：

[1] Univ Lisbon, IDMEC, Inst Super Tecn, Av Rovisco Pais, P-1049001 Lisbon, Portugal

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS | 2025年 / 239卷 / 03期

关键词：

Thin-walled tubes; local buckling; formability limits; experimentation; finite element method;

D O I：

10.1177/14644207241266898

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article focuses on the identification and quantification of the formability limits due to local buckling in thin-walled square tubes subjected to axial compression. The methodology involves subjecting a series of thin-walled square tubular specimens of varying lengths to axial compression to detect sudden changes in the evolution of in-plane strains over time and determine the critical strain values at the onset of local buckling. Digital image correlation is employed to monitor the evolution of the thin-walled surfaces and the in-plane strains during axial compression. Finite element analysis is utilized to create digital twins of the thin-walled square tubes subjected to axial compression. The overall methodology is based on a previously developed technique that was successfully applied to thin-walled circular tubes and results validate its effectiveness in determining, for the first time, the formability limits of thin-walled square tubes due to local buckling in principal strain space.

引用

页码：556 / 567

页数：12