Abstract:The traditional methods of measuring the porosity use mainly experimental methods

their accuracy cannot be guaranteed

the reproducibility is poor

and which may cause damage to the material.In this paper

based on the correlations of the elastic and porosity

the nondestructive porosity measurement of tissue engineering scaffold is researched.Ultrasonic vibrometry technology and FEM are be used to simulate that ultrasound excites material to produce acoustic response.As a result

the relationship between the elasticity modulus and porosity is acquired.At the same time

we find when porosity is certain

pore distribution is different

the centroid skewing will affect the natural frequencies

which can’t guarantee the effective young's modulus's oneness. And the influence of centroid to young's modulus is proved:porous model overall effect on the effective young's modulus is equivalent to the sum of every single hole's influence to young's modulus.