SYMPOSIA PAPER Published: 01 January 1991
STP17712S

The Upper Bounds of Reduced Axial and Shear Moduli in Cross-Ply Laminates with Matrix Cracks

Source

The present study proposes a mathematical model utilizing the Internal State Variable (ISV) concept for predicting the upper bounds of the reduced axial and shear stiffnesses in cross-ply laminates with matrix cracks. The displacement components at the matrix crack surfaces are explicitly expressed in terms of the observable axial and shear strains and the undamaged material properties. The reduced axial and shear stiffnesses are predicted for glass/epoxy and graphite/epoxy laminates. Comparison of the model with other theoretical and experimental studies is also presented to confirm direct applicability of the model to angle-ply laminates with matrix cracks subjected to general in-plane loading.

Author Information

Lee, J-W
Texas A&M University, College Station, TX
Allen, DH
Texas A&M University, College Station, TX
Harris, CE
NASA Langley Research Center, Hampton, VA
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Details
Developed by Committee: D30
Pages: 56–69
DOI: 10.1520/STP17712S
ISBN-EB: 978-0-8031-5169-7
ISBN-13: 978-0-8031-1419-7