Numerical Study of Ring Fragmentation
The fragmentation of rings and shells is a topic of enduring interest both because of the interesting dynamic conditions under which it takes places and the practical importance of fragmentation to various military and industrial applications. Fragmentation is a complex process in which potential fracture sites interact with one another in a deforming body to form a population of fragments. The details of this process are important, and realistic models need to capture the essential features of this process in order to make accurate predictions.
In this work, computational modeling of fragmentation experiments involving Al 6061-0 rings is explored and compared with experimental data. The effect of the mesh description and resolution on modeling the fragmentation process will be examined. The effect of defect population and the manner in which it is applied in the model will also be explored.
KeywordsCone crack Impact Indentation Ceramic Damage
I gratefully acknowledge John Niederhaus and the rest of the ALEGRA development team (SNL) for their assistance in the use of ALEGRA in support of this work and feedback from Charles Randow (ARL). This work was supported in part by a grant of computer time from the Department of Defense High Performance Computing Modernization Program at ARL.
- 2.Gurney, R.: The initial velocities of fragments from bombs, shell, grenades. No. BRL 405 (1943)Google Scholar
- 3.Gurney, R., Sarmousakis, J.: The mass distribution of fragments from bombs, shell, and grenades. No. BRL 448 (1944)Google Scholar
- 24.Bova, S., Hansen, G., Labreche, D.A., Love, E., Luchini, C.B., Roberts, N.V., Robinson, A.C., Sanchez, J.J., Siefert, C., Voth, T.E., Carleton, J.C., Niederhaus, J.H.J., Drake, R.R., Hensinger, D.M., Kramer, R.M.J.: ALEGRA user manual. No. SAND2018-DRAFT (2018)Google Scholar
- 25.Johnson, G.R., Holmquist, T.J.: Test data and computational strength and fracture model constants for 23 materials subjected to large strains, high strain rates, and high temperatures. No. LA-11463-MS (1988)Google Scholar