MODELLING AND FINITE ELEMENT ANALYSIS FOR THE ENGINE CYLINDER HEAD UNDER NONLINEAR DYNAMIC THERMAL MECHANICAL LOADING
Tawfeeq. N. Hussein*, Minah. M. Fareed, Hussein Al-Gburi
Al-Mussaib Technical Institute, Al-Furat Al-Awsat Technical University, 51009 Babylon, Iraq.
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Internal combustion engine is considered as a highly stressed structure due to high entire temperature and presser. For the engine structures and their entire components like cylinder head; it’s no arguing that this structure can consider a highly loaded, because it’s subjected to high fluctuations in temperature, pressure and clamping loads. The main objectives for this research work are to evaluate the materials response distortion, stress distribution and their effects on the engine performance. For these considerations, finite elements analysis methods by using (ABAQUS / CAE) software have been adopted for modelling and analysis purpose. The model with two layers (elastoplastic –viscoelastic) is considered as a best model which suitable to modelling the materials response of aluminum cylinder head with plasticity as well as considerable time-dependent at room and elevated temperatures. The results shown that the distortion in the cylinder head, valve ports and nearby regions is caused by the thermal stresses concentration and Von Mises stress distribution. The normal assessing of product performance is depending on fatigue and failure prediction in the overall structure. Also the direct cyclic analysis procedure is normally depending on the design considerations and this normally used for calculations of fatigue life.