Accession Number:

AD1144065

Title:

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

Descriptive Note:

[Technical Report, Technical Report]

Corporate Author:

Army DEVCOM Ground Vehicle Systems Center

Personal Author(s):

Report Date:

2021-03-02

Pagination or Media Count:

7

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.

Descriptors:

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

[A, Approved For Public Release]