Micromechanical strength effects in shock compression of solids
Time-resolved shock-wave measurements and post-shock recovery have long been used for inferring the underlaying micromechanics controlling high-rate deformation of solids; this requires considerable subjective interpretation. In spite of this, progress has been made in experimentation and theoretical interpretation of the shock-compression/release cycle and some of the results are reviewed here for weak shocks. This cycle involves the elements of the elastic precursor, plastic loading wave, pulse duration, release wave, and post-mortem examination. Those topics are examined, with emphasis on the second and fourth elements. Cu and Ta results show how shock data can be used to determine the transition from deformation mechanism of thermal activation to that of dislocation drag. Release-wave studies indicate that the leading observable release disturbance in fcc metals may not be propagating with the ideal longitudinal elastic-wave speed. 5 figs, 18 refs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10159364
- Report Number(s):
- LA-UR-93-1670; CONF-9306167-4; ON: DE93014425
- Resource Relation:
- Journal Volume: 309; Conference: 14. international conference on high pressure science and technology and 1993 technical meeting of the topical group on shock compression of condensed matter,Colorado Springs, CO (United States),28 Jun - 3 Jul 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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