PSI - Issue 33

Ilham Widiyanto et al. / Procedia Structural Integrity 33 (2021) 27–34 Widiyanto et al. / Structural Integrity Procedia 00 (2019) 000–000

31

5

different ways, which is essential to know when analyzing or designing any structure. Von-Mises stress becomes the determining factor whether the material will fail or not. Material is said to begin to melt when the von-Mises stress reaches a critical value called yield. The results can be seen in Fig. 4. a b

c

Fig. 4. Contours of structural stress according to von-Mises calculation. (a) X axis, (b) Y axis, (c) Z axis

4.2. Component strain The FEA gave higher accuracy in strain analysis than the conventional analysis. Strain analysis is based on the mechanical properties of a material and its ability to withstand the anticipated loads. Strain hardening is an increase in material hardness by plastic deformation. It is a property that mainly occurs in metals and their alloys, but not all these materials are equally prone to strain hardening. The strain is the ratio between the deformation and the original length. Think of strain as percent elongation, how much bigger (or smaller) is the object upon loading it. The results can be seen in Fig. 5 and Table 4.

Fig. 5. Strain contours on the designed chassis.