Spallation and dynamic elongation of metals as an effect of laser induced shock waves

I. Gilath*, S. Eliezer, M. P. Dariel, L. Kornblit, T. Bar Noy

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Spall and dynamic elongation at ultra high strain rate was investigated using short pulsed laser induced shock waves in metallic foils. The controlled stepwise increase in laser energies in a one-dimensional shock wave geometry was used to find the stages of damage evolution from incipient to complete perforation of the target. A phenomenological model was developed for laser produced spall in the 100 kilobars regime. By substituting experimental values in the model it was found for pure aluminum a spall pressure of 26±6 kbar and for pure copper 28±6 kbar at a strain rate of about 3×107 sec-1. The experimental results and results calculated with the model were compared to simulations and good agreement was found. A novel method was developed to measure the total elongation at fracture at ultra high strain rate.

Original languageEnglish
Pages (from-to)689-695
Number of pages7
JournalIsr J Technol
Issue number3 -4,Pt B
StatePublished - 1988
Externally publishedYes
EventFourth Israel Materials Engineering Conference IMEC IV - Beer Sheva, Isr
Duration: 7 Dec 19888 Dec 1988


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