Suherman , Arifin Nur, Achmad Praptijanto, Widodo Budi Santoso, Bambang Wahono, Muhammad Khristamto Aditya Wardana, Stress and Deformation Analysis of a Crankshaft in Range Extender Engine, Journal of Engineering and Applied Sciences, Volume 11,Issue 12, 2016, Pages 2607-2611, ISSN 1816-949x, jeasci.2016.2607.2611, (https://makhillpublications.co/view-article.php?doi=jeasci.2016.2607.2611) Abstract: Crankshaft is an essential part of an internal-combustion engine. In this paper, 3D Model of the crankshaft was made using solidWorks software. SolidWorks software was used to analyze the point of maximum stress and maximum deformation point of the two materials to be used in production (Ti-8AL-1Mo-1V and 40CrMnMo7). The material characteristic, crankshaft dimension and obstacle of boundary conditions were established as the constrains to the simulation. Finally, the point of maximum stress and maximum deformation point were analyzed. Moreover, static strength and fatigue evaluation of crankshaft were also done and the results obtained are used as valuable reference in the optimization and improvement to the crankshaft design. Keywords: material 40CrMnMo7;material Ti-8AL- 1Mo-1V;solidworks;range extender;deformation;stress;Crankshaft