About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Additive Manufacturing of Polymeric-based Materials: Challenges and Potentials
|
Presentation Title |
Numerical Simulation of a Failed Large Area Additive Manufacturing Build to Determine Thermal, Stress, and Distortion History |
Author(s) |
Brian Friedrich, Kyosung Choo |
On-Site Speaker (Planned) |
Brian Friedrich |
Abstract Scope |
To study the effects of heat retention on overhanging features, an experimentally built pyramid was created by the material extrusion process. The pyramid failed due to excess distortion and the phenomenon of slumping. To better understand the cause of the significant distortion and slumping, a thermo-structural model recreated the experimental process. The finite element analysis simulates the material extrusion printing process completed during the experiment. The thermal results show the temperature profile agrees with the experimental thermal profile within a 5% error. The temperature profile results show exponential cooling in the build and increased heat retention near the top as the layer print time decreases. The structural simulation results show that the simulation and experimental build distortions were in good agreement. Additionally, the stress profile of the model indicates that the slumping failure mechanism is caused and controlled by geometry, heat retention, and material properties. |