Structural Analysis of Ladder Chassis for Higher Strength

Abstract — Automotive chassis is an important part of an automobile. It forms the bones of a vehicle. The chassis serves as a frame work for supporting the body and different parts of the automobile, it should be rigid enough to withstand the shock, twist, vibration and other stresses & its principle function is to carry the maximum load for all designed operating condition safely. An important consideration in chassis design is to have adequate bending stiffness along with strength for better handling characteristics. Therefore, maximum shear stress and deflection are important criteria for the chassis design. This paper describes Structural analysis & optimization of vehicle chassis with constraints of maximum shear stress and deflection of chassis under maximum load. In the present work, we have taken higher strength as the main issue, so the dimensions of an existing vehicle chassis of a TATA LP 912 Diesel BS4 bus is taken for analysis with materials namely Steel alloy (Austenitic) subjected to the same load. The four different vehicle chassis have been modeled by considering four different cross-sections. Namely C, I, Rectangular Box (Hollow) and Rectangular Box (Intermediate) type cross sections. For validation the design is done by applying the vertical loads acting on the horizontal different cross sections. Software used in this work Pro e 4.0 & Altai