PRELIMINARYANNOUNCEMENT NINTH U.S. NATIONAL CONGRESS OF APPLIED MECHANICS Cornell University, Ithaca, New York 21-25 June 1982 ‘Ihe Congress is organ&d by the U.S. NationalCommittee on Theoreticaland AppliedMechanics of the National Academy of Sciences, representing 10 Institutes and Societies: American Physical Society American Society of Civil Engineers American Instih~tc of Aeronautics and Astronautics An&can Institute of Chemical Engineers American Mathematical Society Ame&an Society for Testing and Materials American Society of Mechanical Engineers Society of Rheology Society of Experimental Stress Analysis Society for Industrial and Applied Mathematics. Sessions for general lectures, symposia on special topics and contributed papers are being planned. Research workers in the field of Theoretical and Applied Mechanics will be invited to submit papers to the Congress. Further announcements concerning the symposia and sub mission of contributed papers will be made later. ’ The members of the organizing committee at Cornell University are: Richard H. Lance, Local Arrangements James T. Jenkins, Treasurer Wolfgang H. Sachse, Secretary Yih-HsingPao, General Chairman Inquiries regarding the Congress should be addressed to: Prof. Y. H. Pao, Department of Theoretical and Applied Mechanics, Thurston Hall, Cornell University, Ithaca, New York, NY 14853, U.S.A.