Impact Studies of Polymeric Matrices.
Abstract
The report is concerned with measuring, analyzing, and ultimately predicting the response and damage that results when a hard object of known mass, velocity, and curvature strikes the semi-infinite materials such as PMMA, polycarbonate and epoxy. The capability for precise velocity control of 4.5 mm diameter steel projectiles to at least 1000 ft/sec is developed and processing of stress-pulse signal to determine initial pulse shape is described. Relaxation, strain-hardening, and a subsequent accelerated strain relaxation are observed in PMMA. The latter process was not detected in polycarbonate. The epoxy shows only relaxation. Low velocity impact provides a sensitive mechanical 'fingerprint' of the materials and serves as a useful base for investigating higher velocity impacts. (P.S.-PL)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1973
- Accession Number
- AD0764628
Entities
People
- William B. Hillig
Organizations
- General Electric