A COMPACT TENSION METHOD FOR TESTING INTERLAYER CRACK RESISTANCE OF ADDITIVELY MANUFACURED POLYMERS

Abstract

The current work explored the use of a compact tension method for testing interlayer crack resistance of additively manufactured polymers based on a modification of the ASTM E813 compact tension test. Test specimens were manufactured using PLA material on a fused filament fabrication 3D printer. Results showed that the peak load was consistent between specimens, however there was inconsistency in the load-point displacement curve, leading to variations in the calculated J-integral for the specimens. Based on the findings of this study, the compact tension specimen could be an effective tool for assessing the fracture-resistance of 3D printed polymers, because the overall geometry of the specimen allows crack formation to occur without excessive deformation or premature failure in low-stiffness, low strength polymers. Further investigation is required to develop greater consistency in the test data, particularly when it comes to measured load-point displacement and energy calculations.

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Document Details

Document Type
Technical Report
Publication Date
Mar 02, 2021
Accession Number
AD1144065

Entities

People

  • Robert J. Hart

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Additive Manufacturing
  • Carbon Fibers
  • Composite Materials
  • Engineering
  • Fabrication
  • Fiber Reinforced Composites
  • Fibers
  • Fused Deposition Modeling
  • Ground Vehicles
  • J Integrals
  • Manufacturing
  • Materials
  • Resistance
  • Test Methods
  • Three Dimensional
  • United States
  • Warfare

Fields of Study

  • Materials science

Readers

  • Manufacturing Engineering.
  • Materials Science (Mechanical Engineering).
  • Nanocomposite Materials Science