Uniaxial and biaxial testing of 3D printed hyperelastic photopolymers

• Published in: Journal of applied polymer science Vol. 137; no. 8
• Main Authors: Morris, Karcher, Rosenkranz, Andreas, Seibert, Henning, Ringel, Lars, Diebels, Stefan, Talke, Frank E.
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 20.02.2020; Wiley Subscription Services, Inc
• Subjects: 3D printing; biaxial testing; Biaxial tests; Computer simulation; Deformation; Discount coupons; Finite element method; finite element modeling; Isotropic material; Materials science; Mathematical models; Nonlinear response; Parameters; Photopolymers; Polymers; TangoBlackPlus; Three dimensional printing
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.48400

ABSTRACT Uniaxial and biaxial testing of a three‐dimensional (3D) printed photopolymer (TangoBlackPlus) is performed. The nonlinear material response is studied using specially designed uniaxial and biaxial coupons. Experimental results show a quasi‐isotropic and hyperelastic behavior for longitudinal and transverse directions parallel to the 3D printer build plate. Uniaxial and biaxial testing data are fitted with commonly used hyperelastic material models. The material parameters derived for different material models are implemented into a finite element simulation to illustrate the effect of material models and testing conditions on the deflection of a curved hollow tube undergoing large deformation. HIGHLIGHTS Advanced three‐dimensional (3D) printing enabled a new sample design for uniaxial and biaxial test coupons. Uniaxial and biaxial tests were performed for TangoBlackPlus, a new photopolymer commonly used in 3D printing. Uniaxial and biaxial testing demonstrated an isotropic and hyperelastic material behavior for the different coupons' orientations studied. Biaxial testing enables a unique identification of the Mooney–Rivlin coefficients due to a large number of deformation states. Material coefficients were derived for different models and used as input parameters for finite element modeling. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48400. Uniaxial and biaxial testing of a new three‐dimensional (3D) printed photopolymer (TangoBlackPlus) is performed using specially designed testing coupons. Experimental results show a quasi‐isotropic and hyperelastic behavior. Uniaxial and biaxial testing data are fitted with commonly used hyperelastic material models and implemented into a finite element simulation to study the deflection of a curved hollow tube undergoing large deformation.