Fellow American Society of Mechanical Engineers
American Academy Mechanics (board directors 1984-88, president 1990-91, Distinguished Service award 2004)
November 30, 1983 - November 30, 1987
Society Experimental Mechanics (honorary, president 1970-71, Murray lectureship 1979, Past President award 1971, M.M. Frocht award 1976, Hetenyi award 1995, F.G. Tatnall award 2001, Charles E. Taylor award 2002, Outstanding Alumni award Illinois Institute
November 30, 1969 - November 30, 1970
United States National Committee Theoretical and Applied Mechanics (chairman 1982-84, vice-chairman, 1984-86).
November 30, 1981 - November 30, 1983