Validation of Numerically Simulated Rapid-prototype Model by Photoelastic Coating

Abstract

The role of prototypes has increased considerably, especially functional prototypes, with the help of which the parts can be examined under the working conditions. Recently has been realised that the demand for functional prototypes and the use of built-in rapid prototypes in small series production and medical science have increased significantly. It became necessary to be able to decide whether the certain model can be used in its real load conditions in its application network. In more complicated cases even finite element analysis is need to be carried out. For the correct results at numerical simulation-assuming the exact knowledge of the loads and boundary conditions-the validated material properties also need to be known. The optical photostress method is a good method to validate the previously determined material properties.

Experimental Investigation of the Shear Modulus in the Case of Pure Tensile Test

“…It is important to have a constraint on all of the internal points, which ensures the displacement which is only parallel with the load applied, as you can see in Fig. 3 [9], [10], [11]. Figure 5 shows the deformation caused by torsion and a magnified element of the model which is highlighted.…”

“…Each direction can be identified in the following figure: After determining the material properties, they must be validated before the material is used. We checked our results by using a hybrid method [11]. The idea was to determine the strain distribution of a loaded element with complex geometry using the finite element method; subsequently, the results were validated on the same body by the photostress analysis.…”

“…There are two or three principal directions, which have different material properties [7], [8]. The generalized Hooke law for orthotropic materials is 11 12…”

Research on and Practice of Additive Manufacturing Technologies

“…Of course, after determining the material models and material properties using a tensile testing machine, the results need to be validated. For this purpose, a method has been developed [23].…”

Experimental Dynamical Analysis and Numerical Simulation of the Material Properties of Parts Made by Fused Deposition Modelling Technologies

“…The combination of this flexible technology and the environment friendly material foreshadows the rise of the additive manufacturing using PLA. For engineering usage, we need deeper understanding of the material properties (Ficzere et al, 2014). We researched the available literature about PLA's material properties.…”