Experimental investigation of the micromechanics of rock damage during dynamic loading events (ARO Research Area 2.1: Terrestrial Sciences)

Abstract

The major goals of this project are stated below: 1: Conduct high strain rate compression tests of various rock types determine the dependence of compressive strength and damage on strain rate, peak stress and strain, and loading duration, with particular emphasis on isolating effects of mineralogy, grain size, and initial flaw distribution on failure properties at high strain rates. 2: Quantitative characterization of high strain rate brittle damage using Computed Tomography (CT) as well as optical and scanning electron microscopy. 3: Determination of the energy budget (including quantification of energy partitioned into creation of fracture surfaces in rocks) at high strain rates. 4: Evaluation/calibration of micromechanical models describing damage development acting across a spectrum of strain rates and stress states, from discrete fracture to pulverization.

Document Details

• Document Type: Technical Report
• Publication Date: Dec 22, 2017
• Accession Number: AD1080872

Entities

People

• William A Griffith

Organizations

• University of Texas at Arlington

Tags

Communities of Interest

• Energy and Power Technologies

DTIC Thesaurus Topics

• Acoustic Emissions
• Algorithms
• Crystal Lattice Vibrations
• Dielectric Polymers
• Earth Sciences
• Ecology
• Electron Microscopy
• Energy Levels
• Fermi Levels
• Frequency
• Gages
• Geology
• Geometric Forms
• Grain Size
• Heat Energy
• Materials
• Materials Science
• Measurement
• Mechanics
• Particle Size
• Phase Transformations
• Physics Laboratories
• Planetary Sciences
• Pressure Distribution
• Probability
• Scanning Electron Microscopy
• Strain Gages
• Transducers

Readers

• Computational Modeling and Simulation
• Materials Science (Mechanical Engineering).
• Mechanical Engineering/Mechanics of Materials.

Technology Areas

• Microelectronics