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Side Forces and Stabilization Moment Reasearch for Winter and Summer Tires

Waluś K. J.

Machine Dynamics Research

2012

Vol. 36, No. 3

95-102

Vehicle subjected to specified external excitations is subjected to three-axial loads. Vehicle movements generated directional forces are transmitted through the coupling tire with the road. The value of these forces depends on the angle of the lateral drift, vehicle parameters and surface type. Lateral drift forces and moment stabilizing direct interferences on the front tire and indirectly by steering to the driver. An excessive increase in these forces makes it difficult to control the vehicle, and exceeded the limit of grip may result in loss of vehicle control. The paper presents results of experimental determination of the lateral drift forces and moment stabilizing the running on the machine using five-component hub.

Computer modelling of valve lever forging with various preforms

Czyżewski P., Kocańda A.

Archives of Civil and Mechanical Engineering

2008

Vol. 8, no 3

33-40

Application of CAE has become a com- mon way to decrease a time for process planning and tool design in metal forming. Continuous development of numerical methods and software has provided advanced possibilities to solve various problems. In this paper a thermo-mechanical analysis of valve Iever forging by means of Super Forge software was presented. There were taken into account various geometries of preforms, changes in temperature and internal stress distributions during subsequent forging stages in order to optimize metal tlow. As the result, complete filIing of die cavity without overlaps as well as reduction of flash volume has been obtained. Additionally, values of deformation force components (including side forces) were calculated what was helpfuI in a proper die design with counterlocks.

Zastosowanie metod CAE jest jedną z efektywnych dróg do skrócenia czasu potrzebnego do projektowania procesów kucia. W artykule pokazano termomechaniczną analizę procesu kucia dźwigni zaworu z wykorzystaniem programu SuperForge. W analizowanym procesie przedstawiono wykorzystanie pakietu CAE do zaprojektowania procesu kucia w ten sposób, aby uniknąć wad kuźniczych. Dodatkowo przeanalizowano wpływ poszczególnych wariantów procesu na przebieg sił bocznych działających na matryce kuźnicze.