This paper studies the loading-unloading behaviors of a 3D-printing built bi-material structure consisting of an open-cellular plaster frame filled with silicone. The combination of the plaster (ceramic phase) and silicone (elastomer phase) is hypothesized to possess a non-linearly elastic property and a better ductility. Four-point bending test with programmed cycles of preceding deformations was conducted. The results show that there exists a linear-nonlinear transition when the bending deflection is around 2 mm in the first cycle bending. As the cycle proceeds, this transition is found at the maximum deflection of the previous cycle; meanwhile, the bending stiffness degrades. It is believed that the occurrence of micro-cracks inside the plaster frame is the mechanism behind the phenomenon. The ductile silicone provides a strong network suppressing the abrupt crack propagation in a brittle material. The effects of the frame structure and plaster-silicone ratio were also compared. A high plaster content and large cell size tend to have a higher stiffness and obvious linear to non-linear transition while it also has more significant stiffness degradation.
Loading-Unloading Cycles of 3D-Printing Built Bi-Material Structures With Ceramic and Elastomer
- Views Icon Views
- Share Icon Share
- Search Site
Kao, Y, Zhang, Y, Wang, J, & Tai, BL. "Loading-Unloading Cycles of 3D-Printing Built Bi-Material Structures With Ceramic and Elastomer." Proceedings of the ASME 2016 11th International Manufacturing Science and Engineering Conference. Volume 3: Joint MSEC-NAMRC Symposia. Blacksburg, Virginia, USA. June 27–July 1, 2016. V003T08A008. ASME. https://doi.org/10.1115/MSEC2016-8791
Download citation file: