- Thursday 4/30/2009 at 3 pm
- Siebel Center, Room 4403
In elasticity theory the stress tensor measures the response of an elastic body subjected to an external force. The symmetry of the stress tensor which expresses the conservation of angular momentum had remained a challenge for mixed finite element discretizations. Mixed finite elements are desirable because the stress tensor is computed directly and the equilibrium condition is satisfied. In this talk we present mixed methods for three dimensional elasticity problems which may be viewed as the three-dimensional analogues of the triangular Arnold-Winther elements. This is joint work with D. Arnold and R. Winther.