Dynamic buckling of an imperfect elastic, visco-plastic plate

✍ Scribed by A Hönig; W.J Stronge

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 359 KB
• Volume: 24
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(00)00007-5

✦ Synopsis

Finite element analyses of dynamic buckling of an initially pre-bent plate are compared with static and dynamic experiments on type II columns investigated by Tam and Calladine (Int J Impact Engng 1991;11: 349}77). We employ an elastic}visco-plastic material model of the Cowper}Symonds type, which includes the measured quasi-static e!ective-stress plastic}strain curve. The striker is represented by a point mass impacting a contact surface on the end of a plate. The analysis considers models composed of twodimensional beam-and three-dimensional shell-elements and discusses the e!ects caused by the "nite width of the plate, the strain-and strain-rate hardening material properties and inertia. The calculated static and dynamic response is in good agreement with the experimental curves. Having shown the accuracy of our "nite element model, the e!ect of the impact velocity on the structural response is analysed.