Revisiting Concrete Spall and Breach Prediction Curves: Strain Rate (Scale Effect) and Impulse (Pulse Length and Charge Shape) Considerations
Abstract
Prediction of concrete structure spall and breach as generated by tactical weapons ranging in size from small mortars up to large aircraft bombs in size has traditionally been accomplished through the use of empirically generated prediction curves and algorithms based on data fits to those curves. Past attempts in generating these curves have resulted in less than satisfactory results when scaled thickness [T/W(exp 1/3)] and scaled distance [R/W(exp 1/3)] only were considered. Even when "correction factors" for casing were applied, the data scatter was significant. Work done to consider additional physical parameters important to this localized concrete response is described in this paper. Parameters allowing for the consideration of casing thickness, strain rate effect on strength associated with scale size of experiments, and cylindrical charge shape effects on impulse have been included in the analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1994
- Accession Number
- ADA507386
Entities
People
- Kirk A. Marchand
- Stan Woodson
- Tim Knight