Missile Impact with Material Comminution: New Concept - Turbulence Analogy
Abstract
I. Primary Goal -- develop a rational, physically based, modeling of the greatly enhanced resistance to missile penetration of concrete walls observed at extreme strain rates such as 10/sÑ106/s, motivated by the recognition that previous empirical adjustments of damping or material strength, justified only by selective experiments and impressive-looking videos, do not yield realistic predictions in diverse situations. The main goal is to derive the increased resistance theoretically, based on a new type of fracture mechanics of material comminution driven by kinetic energy, and to calibrate the new theory by diverse test data on projectile impact and penetration. II. Secondary Goals --advance the understanding and modeling of several important, recently identified, ramifications: 1) explosive fracturing of gas or oil shale in deep horizontal wellbores, to facilitate hydraulic fracturing or revitalize gas or oil extraction; 2) explosive fracturing of rocks for the purpose of sequestration of toxic fluid, such as the fracking water or supercritical CO2; 3) fracturing of deep hot rock strata for the purpose of extraction of geothermal heat energy. 4) computational methods for dynamic fracturing in general, such a crack-band, nonlocal and peridynamic methods, with a critical comparison of their efficacy.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 11, 2018
- Source ID
- W911NF1510240
Entities
People
- Zdeněk Bažant
Organizations
- Army Contracting Command
- Northwestern University
- United States Army