Effect of strain rate on the tensile properties of 3D – printed pla specimens with fused deposition modelling

Abstract

This research investigates the influence of strain rate on the tensile properties of Polylactic Acid (PLA) material fabricated through Fused Deposition Modeling (FDM) using Type V ASTM-D638 specimens. Three distinct strain rates (0.8 mm/min, 2 mm/min, and 20 mm/min) are considered, and Digital Image Correlation (DIC) is employed for ultimate tensile strain analysis. The methodology involves CAD modeling, 3D printing, surface preparation, and tensile testing, with DIC analysis performed using the Ncorr application. Results indicate a linear increase in tensile strength with higher strain rates, however, Young's modulus decreases with increasing strain rate. The study also observes a significant decrease in ultimate strain with higher strain rates. This research contributes valuable insights into the dynamic behavior of FDM-printed PLA under different strain rates, offering implications for material performance in applications requiring diverse loading conditions.

Keywords

• Strain rate
• fused deposition modeling (FDM)
• polylactic acid (PLA)
• digital image correlation (DIC)
• tensile testing.

References

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