Structural Engineering and Mechanics
Volume 19, Number 2, 2005, pages 153-172
DOI: 10.12989/sem.2005.19.2.153
Nonlinear analysis using load-displacement control
Young-Doo Kwon, Hyun-Wook Kwon and Beom-Soo Lim
Abstract
A new load/displacement parameter method is proposed for the simultaneous control of applied loads and structural displacements at one or more points. The procedure is based on a generalized Riks?method, which utilizes load/displacement parameters as scaling factors to analyze post-buckling phenomena including snap-through or snap-back. The convergence characteristics are improved by employing new relaxation factors through an incremental displacement parameter, particularly in a region that exhibits severe numerical instability. The improved performance is illustrated by means of a numerical example.
Key Words
post-buckling phenomena; snap-back phenomena; incremental load parameter; incremental displacement parameter; relaxation factor; relaxation method.
Address
Young-Doo Kwon<br />School of Mechanical Engineering, Kyungpook National University, Daegu 702-701, Korea<br /><br />Hyun-Wook Kwon<br />Graduate School, Mechanical Engineering Department, Kyungpook National University, Korea<br /><br />Beom-Soo Lim<br />Agency for Defense Development, Korea