GoKart_Impact_Analysis_Presentation.pptx

GoKart_Impact_Analysis_Presentation.pptx

1. Direct Front and Back Impact Analysis of Go-Kart Chassis Using ANSYS Workbench A Comparative Study Between Aluminium and Carbon Fiber Materials

2. Abstract / Objective This study aims to analyze the front and rear impact behavior of a go-kart chassis using ANSYS Workbench. Two materials—Aluminium and Carbon Fiber—are compared based on total deformation and equivalent stress results.

3. Introduction • Go-kart chassis must withstand impacts during operation. • Understanding stress distribution under frontal and rear collisions ensures safety and durability. • The objective is to perform static equivalent impact simulations to evaluate performance differences between materials.

4. Finite Element Method (FEM) • The FEM divides the chassis into discrete elements interconnected by nodes. • Each element follows equilibrium equations derived from elasticity theory. • The stiffness matrix [K] relates nodal displacements {u} to applied loads {F} through [K]{u}={F}.

5. Impact Mechanics • Direct impact refers to load application along the longitudinal axis of the chassis. • Static equivalent loads are applied to approximate dynamic impact forces. • The analysis assumes linear elastic material behavior and fixed boundary constraints.

6. Stress and Deformation Theory • Von-Mises Equivalent Stress: σ_eq = sqrt(0.5*((σ1−σ2)^2 + (σ2−σ3)^2 + (σ3−σ1)^2)) • Total Deformation: δ = sqrt(ux^2 + uy^2 + uz^2) • Lower deformation and stress indicate better impact resistance.

7. Material Selection Material properties: Aluminium Alloy: • Elastic Modulus: 70 GPa • Poisson’s Ratio: 0.33 • Yield Strength: 250 MPa • Density: 2700 kg/m³ Carbon Fiber Composite: • Elastic Modulus: 140 GPa • Poisson’s Ratio: 0.28 • Tensile Strength: 600 MPa • Density: 1600 kg/m³

8. Geometry Modeling [Insert chassis geometry screenshot here] • 3D CAD model of the go-kart chassis created in SolidWorks and imported into ANSYS. • Simplifications: symmetry assumptions and exclusion of minor fillets. • Defined coordinate axes for load and support applications.

9. Meshing [Insert mesh screenshot here] • Tetrahedral meshing applied with size optimization for accuracy. • Mesh quality verified using skewness and aspect ratio metrics. • Refined mesh applied at impact zones and joints.

10. Boundary Conditions & Loading [Insert boundary condition schematic] • Named selections defined for front and back regions. • Fixed supports applied on opposite ends depending on impact direction. • Static load equivalent to impact force applied at designated faces.

11. Results: Aluminium and Carbon Fiber Placeholders for screenshots: • Aluminium – Front Impact: Deformation • Aluminium – Back Impact: Stress • Carbon Fiber – Front Impact: Deformation • Carbon Fiber – Back Impact: Stress Interpretation: • Aluminium shows greater deformation due to lower stiffness. • Carbon fiber exhibits higher stiffness with localized stresses.

12. Quantitative Comparison Table (to be filled with simulation data): | Material | Impact | Max Deformation (mm) | Max Eq. Stress (MPa) | Weight (kg) | Safety Factor | |-----------|---------|----------------------|-----------------------|--------------|----------------| | Aluminium | Combined | — | — | — | — | | Carbon Fiber | Combined | — | — | — | — |

13. Qualitative Discussion • Aluminium: Ductile, absorbs more impact energy, moderate stress. • Carbon Fiber: Lightweight, stiffer, brittle failure tendency. • Trade-off between weight reduction and energy absorption capability. • Ideal choice depends on performance priority—safety or efficiency.

14. Conclusions • Both materials perform within safe limits under combined impact conditions. • Carbon Fiber offers higher stiffness and weight advantage. • Aluminium provides better energy absorption under extreme conditions. • Future work: dynamic crash simulation, hybrid composite analysis.

15. References 1. ANSYS Mechanical APDL Theory Reference, ANSYS Inc. 2. J. Smith et al., 'Crash Analysis of Go-Kart Chassis,' Int. J. Mech. Eng., 2023. 3. R. D. Cook, 'Concepts and Applications of Finite Element Analysis,' Wiley. 4. ASM Handbook: Composite Materials, 2015.