Title page for ETD etd-11072012-101700

Type of Document Master's Thesis
Author Lee, Shi-Wei
Author's Email Address
URN etd-11072012-101700
Title Analysis of Composite Laminates with Matrix Cracks
Degree Master of Science
Department Engineering Mechanics
Advisory Committee
Advisor Name Title
Aboudi, Jacob Committee Chair
Herakovich, Carl t. Committee Member
Pindera, Marek-Jerzy Committee Member
  • matrix cracking
Date of Defense 1999-08-05
Availability restricted

Analysis of the effects of matrix cracking on composite laminates is a well-known problem which has attracted considerable attention for the past decade. An approximate analytical solution is introduced in this thesis to study this type of problem.

The subjects of primary concem are the degradation of effective laminate properties, such as axial stiffness, Poisson’s ratio, shear modulus, and coefficient of thermal expansion, as a function of crack density and the axial stress redistribution due to the existence of matrix cracks. Both transverse cracks (2-D problem) and cross (transverse and longitudinal) cracks (3-D problem) are studied. 1, Results for graphite/epoxy cross-ply laminates are presented and compared to those of other approaches. Some other materials, for instance, glass/epoxy, are also studied. The results and comparisons will appear where appropriate. In general, the agreement between the results of the present analysis and those of other approaches, in particular, the finite element method, is good for the lower crack density. The present study shows that Poisson’s ratio may be a good indicator of the degree of damage for a cracked laminate.

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