PSI - Issue 33

Imam Abdul Majid et al. / Procedia Structural Integrity 33 (2021) 35–42 Majid et al. / Structural Integrity Procedia 00 (2019) 000–000

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braking, acceleration, cornering, torsion, maximum load on front axle which are balanced by inertia forces and maximum load on rear axle (Beerman, 1989). 4. Analysis preparations 4.1. Geometry and applied material The first step of this method is forming a geometric model ladder frame chassis refers to AC Cobra's similar chassis design by using Autodesk Fusion 360 software (see Fig. 2). This AC Cobra chassis material uses steel and is designed using a double-sided tube beam ladder frame. Then the material is given to the chassis by using Finite Element Simulation Software, then determine geometry fixed setting, input force on the part, running mesh process, then result in static load simulation. The final step is calculating data. This frame will be simulated with static loading by determine fixed support and then will be given the vertical force. The supports fixed to the frame are clamped at both the front and rear suspension. The specification of the chassis is described in Table 1. The applied material used for AC Cobra similar chassis ladder frame in this study case is steel. These material properties have shown in Table 2.

Fig. 2. Designed ladder frame referring to AC Cobra chassis geometry.

Table 1. Chassis specification. Component

Value

Chassis type Main side beams Wheel base Rear overhange Front overhange

Ladder frame chassis Two side tube beam

2286 mm

191.3405 mm 177.9375 mm 7.323 x 10 4 g 2614.709 mm 682.992 mm

Gross vehicle weight

Length Width

Table 2. Properties of the applied material. Material Properties

Value

Density

7.85 x 10 -6 kg/mm 3

Young's Modulus Poisson's Ratio Yield Strength

210000 MPa

0.3

207 MPa 345 MPa

Ultimate Tensile Strength

4.2. Numerical configuration The mesh size is made different and determined by default by the software, which adapts to the complexity of the frame and the computer's capabilities. The average element size frame design is 15mm. The meshing is done on the model with 555593 numbers of nodes and 272966 numbers of Parabolic elements. The result of the meshing carried out on the AC Cobra chassis ladder frame design is shown in Table 3.