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For more see the link: Prof. R. M. Evan-Iwanowski
In Memory of Ross. M. Evan-Iwanowski (1914 – 2001), Published in Nonlinear Dynamics, Vol. 26, 2001, written by Subhash C. Sinha, Dept. of Mechanical Engineering, Auburn University, Alabama:
On March 18, 2001, the scientific community lost one of its pioneers in the field of nonlinear dynamics and vibrations. Professor Ross Evan-Iwanowski passed away in Orlando, Florida from complications following the surgery after his second stroke.
Dr. Evan-Iwanowski received his Master of Science degree in 1937 from Wilno University, Poland and a Ph.D., delayed by WWII, in 1954 from Cornell University. A year later he joined the engineering faculty of Syracuse University and started organizing the Applied Mechanics Laboratory (AML) for which he served as the research director.
Dr. Evan-Iwanowski initiated at AML an intensive study on stability of thin structural elements using nonlinear formulations, proposed then by Von Karman, and experimentation for static stability. Some new ‘firsts’ were posted: the significance of nonlinear effects and boundary fixation, careful preparation of the test models, experimental set-up and execution of the tests. Very good agreements were obtained between theory and experiments for spherical shells and caps subjected to concentrated symmetrical and asymmetrical forces and superimposed uniform loads; cylindrical monocoque and reinforced shells subjected to axial symmetrical and asymmetrical edge forces (the GE shells error) superimposed on the uniform external pressures (Stein-Fischer controversy). The error in the ‘GE-shell’ calculation had been definitely removed, and the Stein-Fischer controversy was resolved analytically by Koiter and experimentally confirmed at AML. This pioneering work not only supplied design criteria, but more importantly provided a comfortable level of confidence in the newly developing field of thin walled structures.
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