Experimental and theoretical study of free–free beam subjected to impact at any cross-section along its span

✍ Scribed by J.L. Yang; F. Xi

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 701 KB
• Volume: 28
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(02)00123-9

✦ Synopsis

A high-speed camera system is adopted to measure the instantaneous deformation of a free-free beam struck by a projectile at any cross-section along its span. The material in the experiment is made of hard aluminum (LY12R) which is less sensitive to the strain rate. A theoretical model is based on an elasticplastic linear hardening material and the formulation is derived from the minimum principle in dynamics of elastic-plastic continua at finite deformation in association with a numerical technique. Some experimental results and theoretical predictions are given for the beam impacted at mid-span and 1/4 span, and attention is focused on the dynamic behavior of the beam in the early, transient stage of the response.