PSI - Issue 33

Muhammad Faiz Dzulfiqar et al. / Procedia Structural Integrity 33 (2021) 59–66 Dzulfiqar et al. / Structural Integrity Procedia 00 (2019) 000–000

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Fig. 3. Static load setup for the FE analysis.

Table 3. Mesh properties of the FE model. Parameter

Value

Scale Mesh Size Per Part Average Element Size

No

5 mm

Element Order

Parabolic

Create Curved Mesh Elements Max. Turn Angle on Curve (Deg.) Max. Adjacent Mesh Size Ratio

Yes

60

1.5

Max. Aspect Ratio

10

4. Results and discussion 4.1. Von-Mises stress

One of the primary goals of stress analysis is knowing the point of the structure member that is subjected to the highest and lowest stress level (Mott and Vavrek., 2018). There is no universal theory or criterion of failure that can be used for the general case materials (Richard and Keith., 2015). There are two commonly accepted ductile material failure theories used for the structure under static loading: Maximum Shear Stress Theory and Distortion Energy Theory (Buonamici et al., 2018). The distortion energy theory applied in the study has resulted as presented in Fig. 4, which revealed the maximum values of Von-Mises stress are 29.86 MPa, and the minimum value is 2.275 x 10 -5 MPa. The highest results have primarily occurred on the top aluminum profile frame of the structure of the automatic thickness checking machine. In this area, the structure is given a constant load of the Festo assembly mechanism and the ultrasonic thickness gauge. Furthermore, the maximum value is in the middle because it is the mid-point of two load points. At the same time, the minimum Von-Mises stress occurred on the upper backside of the aluminum frame of the structure of the automatic thickness checking machine. This possible because this area is affected by a small amount of stress given on the structure.

Fig. 4. Von-Mises stress contours.