Thermopiezoelastic Stress Analysis of Rotating Thin Disk Under Hygrothermal Loading
کد مقاله : 1095-ISME
نویسندگان:
فریبرز حیدری *1، علیرضا محمدی گرجی2، عذرا سیاستی خیاوی3
1استادیار، عضو هیات علمی دانشکده مکانیک دانشگاه آزاد اسلامی تهران واحد مرکز، مجتمع آیت الله هاشمی رفسنجانی، تهران، ایران
2کارشناسی ارشد، دانشکده مکانیک، دانشگاه آزاد اسلامی تهران واحد مرکز، مجتمع آیت الله هاشمی رفسنجانی، تهرانف ایران
3دانشجو کارشناسی، دانشکده مکانیک، دانشگاه آزاد اسلامی تهران واحد مرکز، مجتمع آیت الله هاشمی رفسنجانی، تهران، ایران
چکیده مقاله:
In this paper, the thermopiezoelectric responses of radially two layered hollow rotating disk subjected to hygrothermal loading are obtained by a straightforward analytical method considering the boundary conditions of the symmetrical disk. Substituting these relations in the mechanical equilibrium equations and electric displacement, lead ultimately to provision of a system of coupled second-order ordinary differential equations in terms of displacement, electric potential and thermal stresses are solved exactly by the successive decoupling method. Using these differential equations, physical characteristics including displacement, temperature, moisture, electric potential and distributions of radial and circumferential stresses are investigated graphically for a range of two layered rotating disk. Numerical results are shown to clarify the effects of hygrothermal loading for temperature and moisture dependence on the pyroelectric effect of the behavior of the rotating disk. The results clearly show that by increasing moisture diffusion, the amount of stresses and radial displacement in both inner and outer layers are increased and because of that the temperature has the same effect. It is also shown that by applying moisture to piezoelectric outer layer, voltage of the rotating disc can be increased.
کلیدواژه ها:
Thermopiezoelastic Stress, Rotating Disk, Pyroelectric Effect, Hygrothermal Loading
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