Accession Number:

AD0779480

Title:

Plasticity Theory of Fibrous Composites - Part I.

Descriptive Note:

Interim technical rept. no. 3,

Corporate Author:

DUKE UNIV DURHAM N C DEPT OF CIVIL ENGINEERING

Personal Author(s):

Report Date:

1973-12-01

Pagination or Media Count:

39.0

Abstract:

Plastic deformation was studied in unidirectional fibrous composites made of isotropic, linearly elastic fibers, and an elastic-plastic, nonhardening matrix of the Mises type. Special attention was given to the effects of axisymmetric stress states. The composite exper-ienced kinematic hardening when loaded by axisymmetric composite stresses. A simple Hardening Rule I was derived and an associated flow rule was formulated. The results obtained from these rules were verified by comparison with exact finite element plasticity solutions for a cylindrical composite model of the B-A SYSTEM. Significant plastic macro-dilitation was found for certain loading directions in the axisymmetric composite stress plane. Author, modified-PL

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE