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NASA NTRS · Conference Paper

Progressive Damage Mechanisms in Thick 3D Composite Structures under Static and Fatigue Loading

Published 2020-09-14 From Langley Research Center 5 authors
Read paper (PDF) ↗ View on NASA NTRS ↗

Attribution

This is the abstract and citation. Full text lives at NASA NTRS — we link out rather than host. All credit to the authors and Langley Research Center.

Abstract

Verbatim from NASA NTRS. Not paraphrased, not summarized.

The objective of this work is to demonstrate validation of predictive capabilities capturing both damage initiation and growth under static and fatigue loading in geometrically complex three-dimensional (3D) composite structures. The composite structure of interest in the present study resembles a 3D blade spar used in rotorcraft applications. Under both static and fatigue testing, it was shown that damage initiated at the same ply-drop location(s) and grew in the axial as well as hoop directions. CompDam – a state-of-the-art Progressive Damage Analysis (PDA) tool was used to achieve successful correlations of metrics including load-displacement responses and damage modes.

Authors

  • Prabhakar M. Rao Raytheon (United States)
  • Mark R. Gurvich Raytheon (United States)
  • Nalinda W. Waas Wichita State University
  • Upul R. Palliyaguru Wichita State University
  • Waruna Seneviratne Wichita State University

Keywords

  • progressive damage analysis
  • PDA
  • ACP
  • composites
  • ACC

Citation: Prabhakar M. Rao , Mark R. Gurvich, Nalinda W. Waas , et al. (2020). Progressive Damage Mechanisms in Thick 3D Composite Structures under Static and Fatigue Loading. Langley Research Center. NASA NTRS ID 20205003616. https://ntrs.nasa.gov/citations/20205003616 ↗