•Fellow, the American Academy of Mechanics (AAM), 1985
•Fellow, the American Society of Mechanical Engineers (ASME), 1989
•Fellow, the Aeronautical Society of India, 1991
•Fellow, the American Society of Civil Engineers (ASCE), 1992
•Fellow, the U.S. Association of Computational Mechanics (USACM), 1995
•Fellow, the International Association of Computational Mechanics (IACM), 1998
•Fellow, the American Society for Composites (ASC), October 2002
•Fellow, the American Institute of Aeronautics and Astronautics (AIAA), May 2005
•Fellow, the Institution of Structural Engineers, Singapore, 2005
•Life Fellow, American Society of Mechanical Engineers (ASME), 2011