Modeling Incipient Spallation in Commercially Pure Tantalum.

Tonks, D. L. ; Zurek, A. K. ; Thissell, W. R.

Technical Information Center Oak Ridge Tennessee

关键词: Spallation;    Tantalum;    Mathematical models;   

RP-ID  :  DE2001766222

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We model commercially pure tantalum incipient spallation data from normal plate impact gas gun experiments. VISAR traces of the free surface velocity, porosity profiles from recovered samples, and void density profiles from three shots at 200, 220, and 254 mls impact velocity are included. The three quantities measured are compared with versions calculated in the ID hydrocode, FIDO. The damage modeling includes a stress based nucleation model, an early time cavitation wave void growth model, and a late time macroscopic porosity growth model. The fitting is reasonably successful. Possible improvements are discussed.