Effect of Prior Aging on Fatigue Behavior of IM7/BMI 5250-4 Composite at 191 C

Abstract

IM7/BMI 5250-4 with carbon fiber orientations [+ or - 45] and [0/90] were aged in air at 191 C for up to 1000 hours. The weight loss was analyzed during the aging process. Tension to failure tests were performed on both the unaged and aged specimens to establish a baseline for the Ultimate Tensile Strengths and Young's Modulus. Tension-tension cyclic load fatigue testing was conducted on the specimen to determine the effect of prior aging on the fatigue response of the composite. Cyclic strain accumulation was not influenced by prior aging, but it was influenced by the stress levels applied. [+ or - 45] specimens lost 0.2% more weight than the [0/90] specimens from aging in air.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2007
Accession Number
ADA470175

Entities

People

  • Christine G. Ladrido

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Body Weight
  • Carbon Fibers
  • Composite Materials
  • Fabrication
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Graphitic Materials
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Working
  • Modulus Of Elasticity
  • Spreadsheet Software
  • Tensile Strength

Readers

  • Materials Science and Engineering.
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.