Accession Number:

ADA278866

Title:

A Mechanics Mode for the Compressive Response of Fiber Reinforced Composites

Descriptive Note:

Technical rept. 1 Jan 1993-29 Mar 1994

Corporate Author:

TENNESSEE UNIV KNOXVILLE DEPT OF ENGINEERING SCIENCE AND MECHANICS

Personal Author(s):

• Chung, I.
• Weitsman, Y. J.

Report Date:

1994-03-29

Pagination or Media Count:

32.0

Abstract:

This article presents a model for the uni-axial compressive response of uni-directionally reinforced fibrous composite. The model accounts for the non-linear shear response and the failure strain of the matrix, incorporating both aspects into a non-linear field equation which governs the load-deflection process. In addition, the model considers the effects of two kinds of geometric imperfections, namely, initial fiber waviness and random fiber spacing. It is shown that under uni-axial compression random fiber spacing may instigate the formation of severe transverse loadings on the fibers, which suggest the existence of a transitional mechanism from micro-buckling to micro-kinking. Computational results are presented which illuminate the effects of several material and geometric factors on the compressive strength of composites.

Descriptors:

• *FIBER REINFORCED COMPOSITES
• *MECHANICS
• *COMPRESSIVE STRENGTH
• *RESPONSE
• COMPRESSION
• SHEAR PROPERTIES
• COMPUTATIONS
• MODELS
• BUCKLING
• TRANSVERSE
• PARTIAL DIFFERENTIAL EQUATIONS
• FAILURE
• STRAIN(MECHANICS)
• DEFLECTION
• MATERIALS
• COMPOSITE MATERIALS
• LOADS(FORCES)

Subject Categories:

• Laminates and Composite Materials
• Numerical Mathematics
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE