SYMPOSIA PAPER Published: 01 January 1986
STP35358S

Dynamic Stress Analysis of Smooth and Notched Fiber Composite Flexural Specimens

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A detailed analysis of the dynamic stress field in smooth and notched fiber composite (Charpy-type) specimens is reported in this paper. The analysis is performed with the aid of the direct transient response analysis solution sequence of MSC/NASTRAN. Three unidirectional composites were chosen for the study. They are S-glass/epoxy, Kevlar/epoxy, and T-300/epoxy composite systems. The specimens are subjected to an impact load that is modeled as a triangular impulse with a maximum of 8960 N (2000 lb) and a duration of 1 ms. The results are compared with those of static analysis of the specimens subjected to a peak load of 8960 N (2000 lb). For the geometry and type of materials studied, the static analysis results gave close conservative estimates for the dynamic stresses.

Author Information

Murthy, PLN
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH
Chamis, CC
National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH
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Details
Developed by Committee: D30
Pages: 368–391
DOI: 10.1520/STP35358S
ISBN-EB: 978-0-8031-4963-2
ISBN-13: 978-0-8031-0447-1