Weight Optimization Of Crankshaft For Single Cylinder 4- Stroke Engine

Abstract

Crankshaft Is A Complex Geometry In The Internal Combustion (Ice) Engine. This Converts The Reciprocating Displacement Of The Piston In To A Rotary Motion Of The Crank. The Three Dimensional Crankshaft Models Was Created By Using The Software Solid works, Was Used For 3d Modeling And Fea Simulation Analysis Was Performed By Using Ansys 2020 R2 Software To Obtain The Total Deformation Magnitude In Critical Locations. The Objective Of The Study Focuses Analysis And Optimization Of Crankshaft To Get Lightweight And Cost Effective Crankshaft. To Achieve This Objective, We Have To Use The Methods To Select Materials And To Optimize The Crankshaft. The Crankshaft Would Be Analysis By Theoretical, Static Finite Element And Modal Analysis. The Static Finite Element Analysis Result Shows That The Total Deformation In All Materials To Be 0.0109-0.032mm, Von-Miss Stress 109 -112.79mpa And Equivalent Strain 0.00061- 0.015. Fea Give The Results Of Mode Shape Vibration And Frequency Of The Modes. The Lowest Free Mode Vibration Of The Crankshaft Was 173 Hz, Which Is Much Greater Than Natural Frequency Which Was 27.2hz. So, The Possible Action Of Resonance Of The Crankshaft Is Very Low And Crankshaft Is Not Running In Critical Speed. The Weight Of The Alloy Steel (Original) Material Is 13.6kg And The Other Three Materials Where Between 4.79 Kg 13.58 Kg. Those Materials The Cast Iron Is The Best Crankshaft Among The Listed And 12.46kg Which Is 8 % Weight Reduce From The Original Material (Alloy Steel Crank Shaft), After Topology The Counter Weight Is Optimized In 0.66 Kg By Weight, Which 5.28 % From The Cast Iron Crankshaft Changing The Material Type And Geometry Optimization Total Of 13.15% From Original Alloy Steel Crankshaft.