Long-rod impact phenomena: role of wave interaction on crack propagation

✍ Scribed by J.H. Choi; C.H. Lee; S.N. Chang; S.K. Moon

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 674 KB
• Volume: 17
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/0734-743x(95)99846-j

✦ Synopsis

Long-rod impact experiments were performed at high velocity (about 1500 m/s) against two different transparent targets: PMMA and glass. Early penetration phenomena of wave and crack propagation have been observed by means of high-speed camera. Microcracks always occur behind the shock wave front. Release waves reflected from the side boundaries of target can result in secondary cracking in front of main fracturing. The wave interaction due to different impedance on the target boundaries affects crack propagation. Thus, size of target and confining materials may play important roles of protection capability against the penetrator.