Dynamic Stress Analysis of Smooth and Notched Fiber Composite Flexural Specimens.

Abstract

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 which is modeled as a triangular impulse with a maximum of 2030 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 2000 Ob. For the geometry and type of materials studied, the static analysis results gave close conservative estimates for the dynamic stresses. Another interesting inference from the study is that the impact induced effects are felt by S-Glass/Epoxy specimens sooner than Kevlar/Epoxy or T-300/Epoxy specimens.

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Document Details

Document Type
Technical Report
Publication Date
Apr 02, 1984
Accession Number
ADA304558

Entities

People

  • C. C. Chamis
  • P. L. Murthy

Organizations

  • Glenn Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Dynamic Loads
  • Dynamic Response
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Frequency
  • Geometry
  • Impact Loads
  • Materials
  • Mechanics
  • Resonant Frequency
  • Secondary Waves
  • Shear Stresses
  • Stress Strain Relations
  • Stress Waves
  • Stresses
  • Wave Propagation

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials
  • Structural Dynamics.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference