Thermo-mechanical analysis of magnesium alloy cylinder heads using a two-layer viscoplasticity model
- سال انتشار: 1401
- محل انتشار: مجله علم مهندسی خودرو، دوره: 12، شماره: 3
- کد COI اختصاصی: JR_IJAEIU-12-3_001
- زبان مقاله: انگلیسی
- تعداد مشاهده: 64
نویسندگان
Sama technical and vocational training college, Islamic Azad University , Varamin Branch, Varamin, Iran
چکیده
Loading conditions and complex geometry have led the cylinder heads to become the most challenging parts of diesel engines. The aim of this study is to compare the distribution of temperature and stress in the aluminum and magnesium cylinder heads under thermo-mechanical loads. The three-dimensional model of the cylinder heads was simulated in abaqus software and a two-layer viscoplasticity model was utilized to investigate the elastic, plastic and viscous behavior of the cylinder heads. The temperature and stress results of magnesium alloy was compared to aluminum alloy results. The results of finite element analysis (FEA) showed that surface temperature of the magnesium cylinder heads is about ۲۳°C lower than the aluminum cylinder heads. As a result, the fatigue lifetime of the magnesium cylinder heads can be improved in comparison to the aluminum cylinder heads. The thermo-mechanical analysis showed that the magnesium cylinder heads tolerate less tensile and compressive cyclic stress compared to the aluminum cylinder heads. The stress reduction value in the magnesium cylinder heads was about ۱۰ MPa which can lead to higher fatigue lifetimes in comparison to the aluminum cylinder heads.کلیدواژه ها
finite element analysis, magnesium and aluminum cylinder heads and valves bridgeاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.