A COMPACT TENSION METHOD FOR TESTING INTERLAYER CRACK RESISTANCE OF ADDITIVELY MANUFACURED POLYMERS
[Technical Report, Technical Report]
Army DEVCOM Ground Vehicle Systems Center
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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.
- Manufacturing and Industrial Engineering and Control of Production Systems