Faculty Advisor

Peterson, Amy M.


The goal of this project was to better understand the residual stresses imparted upon 3D printed polymer parts and then to be able to predict irreversible thermal strain from annealing. Residual stresses in 3D printed pieces are, in part, controlled by raster angle and layer thickness, the two print parameters examined in this project. Using first principles, we fit equations of plane and shear stress to our experimental data and derived equations representing the magnitude and direction of irreversible thermal strain. These equations were used to create an algorithm that takes desired final dimensions and outputs the necessary print parameters. This project added a new dimension to the additive manufacturing field by allowing for the creation of 3D printed one-way shape memory polymers.


Worcester Polytechnic Institute

Date Accepted

April 2017


Mechanical Engineering


Chemical Engineering

Project Type

Major Qualifying Project



Advisor Department

Chemical Engineering

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