The Boundary Element Method for Plate Analysis

2.3.5 Stress resultants

Once the unspecified boundary quantities are established from the solution of the boundary integral equations, the deflection at any point $\mathit{P}\left(\mathit{x},\mathit{y}\right)$ is evaluated from Eq. (2.84). The bending moments ${\mathit{M}}_{\mathit{x}},{\mathit{M}}_{\mathit{y}},{\mathit{M}}_{\mathit{xy}}$ and the shear forces ${\mathit{Q}}_{\mathit{x}},{\mathit{Q}}_{\mathit{y}}$ at a point $\mathit{P}$ in the interior of the plate are evaluated from Eqs. (2.19) and (2.21), respectively. ...