Loading-Unloading Cycles of Three-Dimensional-Printed Built Bimaterial Structures With Ceramic and Elastomer
Academic Article
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
This paper studies the loadingunloading behaviors of a three-dimensional (3D)-printing built bimaterial 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 nonlinearly elastic property and a better ductility. Four-point bending tests with programmed cycles of preceding deformations were conducted. The results show that there exists a linearnonlinear transition when the bending deflection is around 2mm in the first cycle bending. As the cycle proceeds, this linearnonlinear transition is found at the maximum deflection of the previous cycle; meanwhile, the bending stiffness degrades. It is believed that the occurrence of microcracks inside the plaster frame is the mechanism behind the phenomenon. The silicone provides a strong network suppressing the abrupt crack propagation in a brittle material. The effects of the frame structure and plastersilicone ratio were also compared. A high plaster content and large cell size tend to have a higher stiffness and obvious linear to nonlinear transition while it also has more significant stiffness degradation.
