On the combined effect of boundary approximation and numerical integration on mixed finite element solution of 4th order elliptic problems with variable coefficients
نویسندگان
چکیده
Error estimâtes for the mixed finite element solution of 4th order elliptic problems with variable coefficients, which, in the particular case of aniso-/ortho-/isotropic plate bending problems, gives a direct, simultaneous approximation to bending moment tensor field ^ = {ipij)i<ij<2 and displacement field u\ have been developed considering the combined effect of boundary approximation and numerical intégration. AMS Subject Classification. 35J40, 65N30. Received: January 6, 1998. Revised: October 23, 1998.
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