Buckling Temperature and Natural Frequencies of Thick Porous Functionally Graded Beams Resting on Elastic Foundation in a Thermal Environment

Table 1

Temperature-dependent coefficients of Young’s modulus , Thermal expansion coefficient , mass density , and Poisson’s ratio for silicone nitrite Si₃N₄ and stainless steel SUS304.

Material	Properties
Ceramic silicone nitrite	(Pa)	348.43e + 9	0	−3.070e − 4	2.160e − 7	−8.946e − 11
	(K^−1)	5.8723e − 6	0	9.095e − 4	0	0
	(Kg/m^3)	2370	0	0	0	0
		0.24	0	0	0	0
Metal stainless steel	(Pa)	201.04e + 9	0	3.079e − 4	−6.534e − 7	0
	(K^−1)	12.330e − 6	0	8.086e − 4	0	0
	(Kg/m^3)	8166	0	0	0	0
		0.3262	0	−2.002e−4	3.797e − 7	0