Title

Micromechanics Of Fiber-Reinforced Composites

Date

1965

Index Abstract

Not Available

Photo Quality

Complete

Report Number

AFML TR 65-283

Creator

Alexander, E. L.

Caputo, A. A.

Prado, M. E.

Hilzinger, J. E.

Corporate Author

Rocketdyne Canoga Park Calif Research Dept

Laboratory

Air Force Materials Laboratory

Extent

168

Identifier

AD0623644

Access Rights

Distribution of this Document Unlimited

Distribution Classification

1

Contract

AF 33(615)-1627

DoD Project

None Given

DoD Task

None Given

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Abstract

Research on the micromechanical behavior of composites reinforced with boron and other fibers is reported. A wide variety of reinforcing elements were used in photoelastic matrix materials to form beams, plates, and three-dimensional microspecimens of varied configurations. The effects of reinforcing element modulus and elongation were investigated in beams in four- and three-point loading. The degree of stiffening derived from various filament reinforcing materials was defined, and different failure mechanisms were investigated. Reinforced plates were biaxially tested, and fiber unbonding, buckling, and the subsequent stress redistribution were observed photoelastically. Significant advances in microphotoelasticity are reported. Very small specimens were loaded, and sharp microscopic photoelastic stress patterns (including induced flaw points) were photographed. The filament configurations represent typical laminate geometries, and small flaws were seen to have a remarkably wide field of influence.

Report Availability

Full text available

Date Issued

1965-11

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource