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Utilization of Three-Point Bending for Numerical Prediction of Structural Response in Additively Manufactured Parts

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Technical Report,21 Sep 2018,01 May 2019

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US Army Combat Capabilities Development Command Army Research Laboratory Austin United States

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The use of additive manufacturing is permeating multiple industries, and as such, it is necessary to develop rapid experimental and numerical techniques capable of accurately predicting the structural response of additively manufactured components. In this report, beams made using three different additive manufacturing techniques namely, fused deposition modeling, selective laser sintering, and Polyjet are subjected to three-point bend experiments. The results of these three-point bend experiments indicate that each additive manufacturing technique produces a beam with distinct tension compression asymmetry in both the elastic and plastic regimes. The resulting stress strain information is used to calibrate a material model unique to each additive manufacturing technique. Using the calibrated material model, we are able to show that numerical simulations can predict the peak axial force required to extend a complex aero structure within less than 1 error.

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems

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