释义 |
Morera's stress functions [mȯ`rer·ǝz `stres ´fǝŋk·shǝnz] MECHANICS Three functions of position, ψ1, ψ2, and ψ3, in terms of which the elements of the stress tensor σ of a body may be expressed, if the body is in equilibrium and is not subjected to body forces; the elements of the stress tensor are given by σ11 = -2∂2ψ1/∂x2∂x3, σ23 = ∂2ψ2/∂x1∂x2 + ∂2ψ3/∂x1∂x3, and cyclic permutations of these equations. |