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Matrix Crack Effects on Composite Beams with Damage Tolerant Non-Traditional Layups

G. Sarangapani1, Ranjan Ganguli2

Graduate student, Email:
Professor, Corresponding Author, Indian Institute of Science, Bangalore, Email:,, Tel: 91-80-22933017, Fax:91-80- 23600134

Structural Durability & Health Monitoring 2013, 9(1), 67-86.


Two traditional layups built from 0°/45°/90° plies and two recently proposed alternative non-traditional layups built from 5° /65° plies are analyzed in this paper. It was recently shown experimentally that using such off-axis plies in a composite laminate will result in a more damage tolerant structure. A cantilever beam with two traditional layup composite laminates and two non-traditional layup composite laminates is considered in this paper. Both traditional and non-traditional layup schemes are chosen such that they are "hard" laminates, i.e, much stiffer in the longitudinal direction than the lateral direction. The damage is simulated on the beams using a matrix crack model. The reduction in extensional and flexural modulus is discussed for both traditional and non-traditional laminates with different damage levels in the beam. For traditional and non-traditional composite laminates, the tip deflection of beam with constant tip loading and natural frequencies for different damage levels is determined and presented. It is found that the non-traditional layups tend to moderate the behavior of the traditional layups and show better damage tolerance with respect to matrix cracking.


Cite This Article

Sarangapani, G., Ganguli, R. (2013). Matrix Crack Effects on Composite Beams with Damage Tolerant Non-Traditional Layups. Structural Durability & Health Monitoring, 9(1), 67–86.

cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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