Thermal Buckling and Free Vibration Analysis of Heated FunctionallyGraded Material Beams

Defence Science Journal

G. V. Rao²  Khalane Sanjay Anandrao³  R. K. Gupta³  P. Ramachandran¹ 

[1] Defence Research & Development Laboratory, Hyderabad;Vardhaman College of Engineering, Hyderabad;Advanced Systems Laboratory, Hyderabad

关键词: Functionally graded material;    finite element method;    buckling;    free vibration;    timoshenko beam;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

The effect of temperature dependency of material properties on thermal buckling and free vibration of functionally graded material (FGM) beams is studied. The FGM beam is assumed to be at a uniform through thickness temperature, above the ambient temperature. Finite element system of equations based on the first order shear deformation theory is developed. FGM beam with axially immovable ends having the classical boundary conditions is analysed. An exhaustive set of numerical results, in terms of buckling temperatures and frequencies, is presented, considering the temperature independent and temperature dependent material properties. The buckling temperature and fundamental frequency obtained using the temperature independent material properties is higher than that obtained by using the temperature dependent material properties, for all the material distributions, geometrical parameters in terms of length to thickness ratios and the boundary conditions considered. It is also observed that the frequencies of the FGM beam will reduce with the increase in temperature. This observation is applicable for the higher modes of vibration also. The necessity of considering the temperature dependency of material properties in determining thermal buckling and vibration characteristics of FGM beams is clearly demonstrated. Defence Science Journal, 2013, 63(3), pp.315-322 ,  DOI:http://dx.doi.org/10.14429/dsj. 63.2370

【 授权许可】

Unknown