PSI - Issue 27

Angga Kengkongan Ary et al. / Procedia Structural Integrity 27 (2020) 69–76 Ary et al. / Structural Integrity Procedia 00 (2019) 000 – 000

74

6

a

b

Fig. 3. Max. Stress simulation result (700 N, thickness 1.4 mm): (a) CFRP; (b) Al 6061

b

a

Fig. 4. Max. Displacement simulation result (load 700 N, thickness 1.4 mm): (a) CFRP; and (b) Al 6061.

Fig. 5. Summary of material effects to chassis performances.

Based on the effect of material, in the simulation case of 700 N on load and 1.4 mm, the thickness with material type varied shown in Fig. 4, the highest and lowest of maximum displacement, which is Al 6061 and CFRP. Both simulations show that the maximum displacement value occurs on the location of the driver (assumed 700 N), but the amount of it is different. The CFRP material only has 0.516 mm of displacement, while the Al 6061 material has 1.001 mm. This tendency indicates that when the load applied, the structure with material Al 6061 on the red will move about 1 mm from its initial position, and the structure with material CFRP only moves about 0.5 mm. Based on the result summary in Fig. 5, a higher safety factor of an applied material to the chassis influences displacement of the chassis part, followed by the lowest level of maximum strain. The overall behaviors are linear such as in case of CFRP, which have quite high safety factor, the maximum strain is also relatively high among all selected materials. This phenomenon occurs as the material properties of CFRP have higher tensile strength compared to aluminum, which, on the other hand, this material is also inferior in terms of yield strength compared to aluminum. 4.2. Effect of thickness Application of different material thicknesses on the chassis shows that for the same type of material (in this case is CFRP) and the same load (700 N), the maximum stress value of the thickness 1.4 mm is 23.100 MPa, and the thickness 0.9 mm produces the highest value 62.02 MPa. For the maximum displacement value, the highest value occurs in thickness 0.9 mm, with value 0.7484 mm, while the thickness 1.4 results in the lowest value 0.516 mm. The highest