Finite element analysis of concrete subjected to ordnance velocity impact

Darren Logan Rice, Purdue University

Abstract

Ordnance velocity impact of materials such as concrete results in complex reaction phenomena. Attempts to analyse the problem have taken the form of empirical solutions, analytical models, and numerical methods. The form which currently shows the greatest ability to predict the solution to the impact problem is numerical methodology. One such form of solution is the finite element method. The finite element method traditionally relies on inter-element continuity and, thus, cannot represent fragmentation failure modes found in concrete impact. To more accurately model the physical phenomena present, a fragmentation algorithm is incorporated into the finite element method. As fragmentation results in large displacements, a large deformation formulation based on updated material geometry is also developed. Example problems using frame, plane-stress/strain, and axisymmetric elements are presented to demonstrate the fragmentation and large deformation capabilities. A final series of problems is also shown which uses the resulting modified finite element method in solving low-velocity and ordnance velocity impact of unreinforced concrete.

Degree

Ph.D.

Advisors

Ting, Purdue University.

Subject Area

Civil engineering

COinS