Interpolation of tensile properties of polymer composite based on Polyjet 3D printing

This research utilizes the advancement of multi-polymer jetting technology to construct structures from composite layers using polymer materials, and with goal to interpolate intermediate tensile properties that meets the application requirement without compromising the design form. The research hypotheses that the tensile properties of a uniformly layered composite can be linearly interpolated from the mass ratios composing its structure. The hypothesis was tested and validated on standard specimens composed of two polymer materials sandwiched in ultrathin layers. The linear regression analysis between mass ratios and the tensile properties exhibits strong coefficient of determinations for the fitted data \(R_{{\text{reg}}}^2\) and the proposed linear model \(R_{{\text{hyp}}}^2\) which were obtained for yield strength, elasticity modulus, maximum strength, and strength at break. The tensile elongations measured at the maximum strength and the rapture strength undergo significant fluctuations that make their regression less linear with the mass ratio. Finally, the elongation at yield remains constant regardless of mass ratio.