Pringle, C., & Johnson, C., & Choi, J. (2021, July), Material Property Variation in an Additive Manufacturing Lab  Paper presented at 2021 ASEE Virtual Annual Conference Content Access, Virtual Conference. 10.18260/1-2--37486

\bibitem{asee_peer_37486}
  Pringle, C., \& Johnson, C., \& Choi, J. (2021, July), \emph{Material Property Variation in an Additive Manufacturing Lab}
  Paper presented at 2021 ASEE Virtual Annual Conference Content Access, Virtual Conference.
  10.18260/1-2--37486

Charles Pringle PE P.E., Craig Johnson P.E., and Jeunghwan Choi.  "Material Property Variation in an Additive Manufacturing Lab".  2021 ASEE Virtual Annual Conference Content Access, Virtual Conference, 2021, July.  ASEE Conferences, 2021.  https://peer.asee.org/37486 Internet.  23 Apr, 2024

\bibitem{asee_peer_37486}
  Charles Pringle PE P.E., Craig Johnson P.E., and Jeunghwan Choi.
  "Material Property Variation in an Additive Manufacturing Lab".
  \emph{2021 ASEE Virtual Annual Conference Content Access, Virtual Conference, 2021, July}.
  ASEE Conferences, 2021.
  https://peer.asee.org/37486 Internet.  23 Apr, 2024

@INPROCEEDINGS{asee_peer_37486
author = "Charles Pringle PE P.E., Craig Johnson P.E., and Jeunghwan Choi"
title = "Material Property Variation in an Additive Manufacturing Lab"
booktitle = "2021 ASEE Virtual Annual Conference Content Access"
year = "2021"
month = "July"
address = "Virtual Conference"
publisher = "ASEE Conferences"
note = {https://peer.asee.org/37486}
number = {10.18260/1-2--37486}
}

TY  - CPAPER
AB  - Traditional structural design is typically covered in statics and strengths of materials.  New additive manufacturing (AM) techniques allow us to design structures free of prismatic constraints, using ‘freeform’ design that results in better performance.  But AM structures also exhibit significant variation in material properties that must be taken into account.  Using ‘best practice’ in engineering analyses is a student outcome that is part of our senior design course.  One lab was modified in this course to improve student performance on this outcome. 
 
Originally the machine design ‘lever’ lab was a theoretical exercise. Several years ago, this was improved to an applied lab. The student design was printed (AM) and then failed. Recently, the machine design ‘lever’ lab was modified to include a transition from prismatic to freeform design through the creation of a simple lever.  The lab consists of five sequential activities. The first three are: a traditional prismatic analysis, then a non-prismatic analysis, then an optimization to success criteria analysis, with AM fabrication and test feedback.  The last two activities involve applying ‘light-weighting’ techniques and further optimization, with another round of AM fabrication and test feedback.   
 
Throughout the lever lab activities, students are evaluated on analysis performance.  A part of the new modifications was an evaluation of tolerancing and predictions.  Since AM processes have directional and other inputs causing material property variation, this was an aspect of lever performance prediction that was modified and specified for evaluation.  Student performance in this outcome improved and is now used as part of our continued assessment. 


AU  - Charles Pringle PE P.E.
AU  - Craig Johnson P.E.
AU  - Jeunghwan Choi
CY  - Virtual Conference
DA  - 2021/07/26
PB  - ASEE Conferences
TI  - Material Property Variation in an Additive Manufacturing Lab
UR  - https://peer.asee.org/37486
DO  - 10.18260/1-2--37486
ER  -