Stress Analysis with Brittle Lacquer: A Method for the Experimental Evaluation of Loads Developed in Components of Complex Shape

First type isostatic lines: tangents at every point to the maximum principal deformation and stress, in algebraic values.

1.0 WHEN an engineer sets out to calculate the shape and dimensions of parts of machinery he becomes rapidly aware of his ignorance. Mechanical parts have such singular shapes and dimensions and are supported under such conditions that no practical method of calculation will satisfy them.