Axial compression of foam-filled thin-walled circular tubes

✍ Scribed by T.Y. Reddy; R.J. Wall

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 934 KB
• Volume: 7
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/0734-743x(88)90023-1

✦ Synopsis

The effect of low density polyurethane foam on the axial crushing of thin-walled (D/t > 600) circular metal tubes is studied under quasi-static and dynamic loading conditions. The mode of deformation of the tube is found to change from irregular diamond crumpling to axisymmetric bellows folding due to the filler. Assuming the axisymmetric mode of crushing and using the model of foam recently developed (M. F. ASHBY, Metals Trans. 14A, 1755 1769 , the behaviour is analysed. Theoretical predictions agree well with experiments. Numerical results show that there is an optimum foam density which produces a maximum specific energy absorption of the filled cylinders. c,p D h 1o m f, mc Mp Pc Pt(O) Pmt(Oo)