Welcome to the Topology Optimization Group at Johns Hopkins University!

We are a group of talented and motivated individuals pushing the frontiers of Topology Optimization...

Topology Optimization for Polyjet Multi-material 3D Printing

Gaynor A.T, Meisel N.A., Williams C.B., and Guest J.K. (2014). Multiple-material topology optimization of compliant mechanisms created via PolyJet three-dimensional printing. Journal of Manufacturing Science and Engineering 136(061015): 1-10.


Compliant mechanisms are able to transfer motion, force, and energy using a monolithic structure without discrete hinge elements. The geometric design freedoms and multimaterial capability offered by the PolyJet 3D printing process enables the fabrication of compliant mechanisms with optimized topology. The inclusion of multiple materials in the topology optimization process has the potential to eliminate the narrow, weak, hingelike sections that are often present in single-material compliant mechanisms and also allow for greater magnitude deflections. In this paper, the authors propose a design and fabrication process for the realization of 3-phase, multiple-material compliant mechanisms. The process is tested on a 2D compliant force inverter. Experimental and numerical performance of the resulting 3-phase inverter is compared against a standard 2-phase design.

Gaynor A.T. and Guest J.K. (2016). Topology optimization

Zhao L., Ryan S.M., Ortega J.K., Ha S., Sharp K.W., Guest

Guest J.K. (2015). Optimizing the layout of discrete

Osanov M. and Guest J.K. (2016). Topology Optimization for

Lin S., Zhao L., Weihs T.P., Guest J.K., and Liu Z. (2015).

Liu Z., Chen W., Carstensen J.V., Ketkaew J., Mota R.M.O.,

Zhang Y., Ha S., Sharp K., Guest J.K., Weihs T.P., Hemker

Ryan S., Szyniszewski S., Ha S., Xiao R., Nguyen T.D., Sharp