This paper deals with the optimization of the crossbars, parts of the existing frame of the experimental system of the Alternative SkidCar. This part plays a crucial role and is designed to enable and ensure reduced adhesion conditions between the vehicle and the road. To this end, its optimization targeted here is performed using both analytical calculations and simulations in MSC Adams software, wherein the loading forces and boundary conditions on the frame support wheels are obtained considering the static conditions, as well as the change of the direction of travel. The least favourable load observed was used, later on, as the input value for the strength analysis of the frame. The analysis was performed using the finite element method (FEM) in SolidWorks. Based on the linear and nonlinear analyses performed, the course of stress on the frame arms and critical points with the highest stress concentration were determined. Subsequently, according to the results obtained, a new design for the current frame was proposed and, thereby, warrants greater rigidity, stability and strength to the entire structure, while reducing its weight and maximizing the potential of the selected material. The benefit of the current contribution lies in the optimization of the current frame shape, in terms of the position of weld joints, the location of the reinforcements and the thickness of the material used.
This paper is a literature review about tire component requirements for innovation in tire construction. Herein are pointed out essential aspects expected in Tires’ structures from the mechanical point of view for future development of a realistic model for advanced simulation of tires (in miscellaneous operating conditions) and innovation in tire mechanics. Being composite structures, tires are made of many elements chosen with delicacy due to their intrinsic physical properties in regards to load effects. Since tires' mechanical behavior is directly linked to the parameters of its constituents (carcass, steel cord belt, and textile cord belt, namely), it is thereof imperative to grasp some solid pieces of knowledge about. Wherefore, the current contribution explored the mechanical requirements to be taken into account in the matrix (rubber) and reinforcements (steel cords and textile cords) for determining the inputs enabling to build up an accurate and simple computer model for improving tires simulation.
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