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Tensile Properties of Additively Manufactured PLA Material

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Technical Report,01 May 2018,18 Jul 2019

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ARMY RESEARCH LAB ABERDEEN MD Aberdeen Proving Ground United States

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The tensile properties of an additively manufactured PLA sample are explored in this work to ascertain the effect of annealing on the material properties. Five samples are tested as manufactured and five are annealed in an oven for 45 min at 90 degrees C. Tensile tests are performed using an electromechanical test frame and digital image correlation is used for deformation measurement. Analysis shows that the ultimate tensile strength and strain to failure decreased for the anneal samples, while the tensile modulus increased slightly for annealed samples. The failure location on all specimens is consistently at the location where the print initiates in the gage section. The results are contradictory to the data sheet supplied by the manufacturer and it is recommended that a more comprehensive study be performed to determine the annealing parameters necessary to increase the tensile strength of the material beyond what is achievable with an as-printed part.

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Printing and Graphic Arts

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