Static Structural Analysis of the Sports Utility Vehicles Patriot Chassis

Abstract This paper presents a static structural analysis of the Sports Utility Vehicles (SUV) Patriot chassis uses a type of ladder frame with 440 G JIS STAM carbon steel tube and bracket material is AISI 1020. Static load on the patriot chassis is varied in a normal load and an extreme load. The element method simulation is carried out on the chassis until the horizontal chassis position is 0˚, 30˚ downhill and 30˚ uphill. Static structural analysis on the patriot chassis frame using the finite element method found that the overall design is safe under various load variations and support variations. Applied normal load with a total of 4 supports (4 wheels) on the patriot chassis design which is varied by its tilt, show that the 0˚ chassis position produces the highest von mises stress (86.1 MPa) and the highest displacement (0.38mm). The results of extreme loading on various supports of the 3 wheels alternately patriot chassis design show that the highest von mises stress (264 MPa) and the highest displacement (5.11 mm) occurs at 0˚ chassis position with rear right not support. The factor of safety from various variations in loaded, tilt position, and the number of supports of the Patriot chassis design is more than 1 so that the chassis design is declared safe.