Fracture of 3D printed brittle open-cell structures under compression
November 10-14, 2019
We investigated the fracture behavior under compression of well-arranged cubic and tetragonal open-cell structured and notched specimens, all made of brittle plastic and fabricated by 3D printing. The basic material properties were studied by using bulk plastic specimens, the basic properties of cellular-structured specimens by cubic and tetragonal specimens under compression. Notched strip-like specimens were subjected to compressive displacement aimed to study the fracture behavior. The notched specimens were loaded until the columns adjacent to the notch tip collapsed stably by buckling mechanisms, followed by a rapid and unstable sequential collapse mechanisms of the specimens’ columns to a point of failure and load drop. The well-arranged open-cell structured specimens enabled an adequate repeatability of the mechanical properties for valuable analyses and conclusions.
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Dov Sherman and lihi Shenhav, "Fracture of 3D printed brittle open-cell structures under compression" in "Composites at Lake Louise 2019", John Kieffer, University of Michigan, USA Erik Spoeke, Sandia National Laboratories, USA Meisha Shofner, Georgia Institution of Technology, USA Eds, ECI Symposium Series, (2019). https://dc.engconfintl.org/composites_all_2019/7