The influence of phase changes on debris-cloud interactions with protected structures
The physical state of the debris cloud generated by the interaction of a projectile with a thin target depends on the energy balance associated with above the sound speeds of the impact event. At impact velocities well materials involved, the cloud is expected to be primarily molten, but with some vapor present. A series of numerical calculations using the multi-dimensional finite-difference hydrocode CTH has been used to evaluate the effect of phase changes (i.e., different vapor fractions) on these clouds, and their subsequent interaction with backwall structures. In the calculations, higher concentrations of vapor are achieved by increasing the initial temperature of both the projectile and the thin shield while keeping the impact velocity constant, and by actually increasing the impact velocity. The nature of the debris cloud and its subsequent loading on the protected structure depend on both its thermal and physical state. This interaction can cause rupture, spallation or simply bulging of the backwall. These computational results are discussed and compared with new experimental observations obtained at an impact velocity of {approximately}10 km/s. In the experiment, the debris cloud was generated by the impact of a plate-shaped titanium projectile with a thin titanium shield.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10163464
- Report Number(s):
- SAND-94-0083C; CONF-9410131-1; ON: DE94014285; BR: GB0103012
- Resource Relation:
- Conference: 1994 hypervelocity impact symposium,Santa Fe, NM (United States),16-20 Oct 1994; Other Information: DN: HVIS Paper No. 143; PBD: 16 May 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of phase change in a debris cloud on a backwall structure
Dependence of debris cloud formation on projectile shape