Hemivariational Inequalities and Their Applications to Composite Material Structures

  • P. D. Panagiotopoulos
Conference paper


The behaviour of composite material structures is described by nonmonotone possibly multivalued phenomenological material laws, which have a “sawtooth” form because of the arising limit phenomena, as e.g. the cracking or crushing of one phase of the composite, the interface bonding failure, the delamination effect etc. These problems cannot be treated by the classical methods of structural analysis, which give rise to variational equality formulations. Moreover, they cannot be formulated in terms of variational inequalities due to the lack of monotonicity, but they give rise to a new type of variational expressions the hemivariational inequalities.


Variational Inequality Hemivariational Inequality Truss Element Strain Space Composite Material Structure 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • P. D. Panagiotopoulos
    • 1
    • 2
  1. 1.Dept. of Civil Eng.Aristotle UniversityThessalonikiGreece
  2. 2.Institute for Technical MechanicsRWTHAachenFed. Rep. of Germany

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