Lamination Residual Stresses in Multilayered Fiber Composites.

Abstract

Residual stresses arising from the lamination fabrication process are investigated using linear laminate theory. An equation to predict the residual stresses is given. The pertinent variables that influence residual stresses are identified. Several composite systems with various ply layup configurations are examined. Results are presented to illustrate the dependence of the residual stresses on the pertinent variables. The residual stresses are very sensitive to constituent material properties, composite stacking sequence and orientation, fiber content, and processing temperature. It is found that ply transverse tensile and in-plane shear residual stresses can reach magnitudes comparable to corresponding ply strengths and cause transply cracks in the composites. Residual stresses can also cause interply delamination. Ways to prevent transply cracking and interply delamination are recommended. (AN)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1971
Accession Number
ADA305443

Entities

People

  • Christos C. Chamis

Organizations

  • Glenn Research Center

Tags

DTIC Thesaurus Topics

  • Composite Materials
  • Elastic Properties
  • Epoxy Composites
  • Fabrication
  • Geometry
  • Graphitic Materials
  • Laminates
  • Materials
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Residual Stress
  • Shear Modulus
  • Shear Stresses
  • Stress Strain Relations
  • Stresses
  • Tensile Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials
  • Vision Science/Vision Psychology/Cognitive Neuroscience.