"Bald Eagle" <cre### [at] netscapenet> wrote:

> Stress Analysis of Heated Complex Shapes
> Richard H. Gallagher
> Joseph Padlog
> P. P. Bijlaard

This references:

Turner, M . J., Clough, R. W. t Martin, H . C , and Topp, L. J.,
"Stiffness and deflection analysis of complex structures," J. Aeronaut. Sci.
23,805-823 (1956).

Which is the earliest paper I can find concerning the transition from the early
Matrix Displacement Method to the fundamentals of modern Finite Element
Analysis.


"Even in the 1950s, the inversion of a matrix of modest size, often took a few
weeks to determine."  :O

- BE

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