Tensile Properties of Additively Manufactured PLA Material

reportActive / Technical Report | Accesssion Number: AD1078296 | Open PDF

Abstract:

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.

Author(s):
Cline, Julia E
Author Organization(s):
ARMY RESEARCH LAB ABERDEEN MD
Funding Organization(s):
Publication Date:
2019 Aug 09
Pagination:
0

Security Markings

RECORD

Collection: TRECMS
Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
tensile strength, tensile properties, additive manufacturing, tensile modulus, digital images, experimental design, military research, abstracts, manufacturing, materials, annealing, printing
Keyword(s):
3D printing, mechanical characterization
Subject Categories:
Mechanical, Industrial, Civil and Marine Engineering; Test Equipment, Research Facilities and Reprography
Update Date:
2019 Oct 01