Dynamic tensile testing of aramid and polyethylene fiber composites

✍ Scribed by I.S. Chocron Benloulo; J. Rodríguez; M.A. Martínez; V. Sánchez Gálvez

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 853 KB
• Volume: 19
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(96)00017-6

✦ Synopsis

Dynamic

properties of materials such as aramid and polyethylene fiber reinforced composites are rarely found in the literature, in spite of their significance in ballistic design. It is also difficult to find detailed descriptions of the testing techniques and procedures to characterize these materials. This paper describes a dynamic tensile testing technique for these composite materials, and discusses problems such as the specimen size and the clamping system. A full numerical simulation is performed in Autodyn-2D to elucidate what is happening during the experiment. Finally this testing technique is applied to show that reliable data can be obtained from the Hopkinson bar for aramid and polyethylene fiber reinforced composites. Stress-strain, stress versus rate of strain and strain versus rate of strain curves are included. The results indicate that for these materials the tensile strength rises with the strain rate while the maximum strain diminishes in the range studied.