Use and validation of cavity expansion load models in determining structural response of penetrators into ice targets
One analytical technique for modeling penetration, including that of ice, is the cavity expansion method. In this method, assumptions are made regarding the kinematics of the penetration event which effectiively reduce three-dimensional penetration to a one-dimensional problem. This is especially desirable when determining loads on penetrators caused by nonnormal impact, when finite element techniques become quite cumbersome and expensive from a modeling and computational standpoint. In many penetration events, these asymmetric loads are the most severe that the penetrator experiences. The accurate determination of these loads and their effect on the penetrator case, internal structure, and components is a highly desired capability. Structural response of a penetrator can be determined by using the load-time history calculated by a cavity expansion model, which treats the penetrator as a rigid body, as input to a structural dynamics code. This paper briefly illustrates the methodology of this analytical technique with a relevant ice penetration example. In addition, efforts presently under way to verify and improve the capability of cavity expansion models for this purpose are outlined, and preliminary findings from this work pertinent to ice penetration mechanics are discussed.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5582300
- Report Number(s):
- SAND-86-1049C; CONF-8606114-3; ON: DE86013574
- Resource Relation:
- Conference: Ice penetration technology workshop, Monterey, CA, USA, 16 Jun 1986; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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