A method for determining deformations of a body by which the effect of forces on the body is analyzed, including determining the way an equilibrium of forces between internal and external forces for a whole body or a part of it dependent on the material properties and the external boundary conditions comes about, by determining the deformations such that all acting forces are represented by the formula f.sub.ext+m.sub.syst+m.sub.A+f.sub.s(ext)+m.sub.s(syst)=0.