Characterization of Continuous Fiber-Reinforced Composite Materials Manufactured Via Fused Filament Fabrication
Technical Report,28 Jun 2018,03 Aug 2018
ARMY TANK AUTOMOTIVE RESEARCH DEVELOPMENT AND ENGINEERING CENTER WARREN MI WARREN United States
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The current work has focused on characterizing the tensile performance of continuous fiber reinforced specimens manufactured via Continuous Filament Fabrication CFF. The specimens were tested in multiple orientations with and without continuous carbon fiber reinforcement. When comparing 0 degree carbon fiber reinforced specimens to specimens without continuous reinforcement, the average yield strength, tensile strength, and elastic modulus increased by factors of 20X, 15X, and 240X, respectively. When comparing the results for specimens with 90 degree oriented continuous reinforcement to the 0 degree specimens, there was a 60 drop in yield strength, 62 drop in tensile strength, and 52 drop in elastic modulus. These results indicated that mechanical performance is reduced significantly when load is applied perpendicular to the fiber orientations. The adhesion between adjacent layers was tested by printed specimens standing vertically on the print bed. These specimens had the lowest strength of all specimens. The authors recommend follow on testing using rectangular specimens with bonded tabs per ASTM D3039-17 to reduced issues with fiber alignment that were encountered with the dog bone specimens.
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods