Accession Number : AD0780628

Title :   Soft Body Impact Damage Effects on Boron-Aluminum Composites.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Jaques,William J.

Report Date : MAR 1974

Pagination or Media Count : 119

Abstract : The purpose of the experimental study was to investigate and document the effects of soft body impact damage on the residual tensile and axial fatigue strength of Boron-6061 Aluminum composite material. Unidirectional B-6061 Al specimens were impacted with room temperature vulcanizing rubber (TVR) spheres in a powder charge gun facility. Specimens were also impacted under five different tensile loads. Residual tensile strength versus impact velocity plots were generated for each prestress level. The composite was further characterized by axial fatigue and nondestructive tests. All tests were carried out at room temperature. A similar damage and residual strength analysis was done for Ti-6Al-4V to provide baseline data against which to compare the composite. It was concluded that Ti-6Al-4V is much more resistant to impact damage than unidirectional B-6061 Al. A fracture mechanics analysis is presented and a fracture mechanics model proposed for unidirectional B-6061 Al impacted specimens. (Author)

Descriptors :   *Fiber reinforced composites, Boron, Aluminum alloys, Damage, Impact, Tensile strength, Fatigue(Mechanics), Impact tests, Fracture(Mechanics), Theses

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE