Accession Number:

ADA361796

Title:

Studies of Fracture Processes in Cement-Based Materials under Compression with Microtomography and Computer Vision

Descriptive Note:

Final technical rept. 15 Jan 98-14 Nov 99

Corporate Author:

MAINE UNIV AT ORONO DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING

Personal Author(s):

• Landis, Eric N.
• Shah, Surendra P.

Report Date:

1999-02-14

Pagination or Media Count:

10.0

Abstract:

The primary objective of this research program was to provide experimental data to feed into the extensive modeling work of the AFOSR Shock Physics program. Two advanced complimentary experimental techniques were used x-ray microtomography XMT and digital image correlation DIC . The former is a three dimensional technique that is restricted to small specimens under static loading, while the latter is a surface-only technique that can be applied in a variety of conditions. In the initial stages of the program we sought to correlate the fracture measurements of both techniques. By doing this we hoped to be able to develop a method to extrapolate 2D surface measurements a relatively easy process to three dimensions a relatively difficult process . Preliminary results indicate such a method could be developed, however confirmation over a wider range of experimental variables is necessary.

Descriptors:

• *CONCRETE
• *FRACTURE(MECHANICS)
• STATIC LOADS
• DAMAGE ASSESSMENT
• COMPUTER VISION
• TOMOGRAPHY
• COMPRESSIVE STRENGTH

Subject Categories:

• Construction Equipment, Materials and Supplies
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE