THERMOELASTICITY OF UNIDIRECTIONALLY MICROPOLAR CORD-REINFORCED COMPOSITES

This article develops a unipolar thermoelastic constitutive relation f or twisted cord-reinforced elastomeric composites. Depending on the co rd twist about the axial direction, the associated torsional moment an d extensional forces may be strongly coupled. Such coupling leads to s imultaneous extensional and torsional thermal expansion. The generalit y of the scheme of formulation is such that large deformation/strain s ituations can be handled. This is achieved through the use of second P iola Klrchhoff stress and moment stress tensors and their associated k inematic measures. Note that such pairings are cord, i.e., particle fo llowing. In this context the provide for a consistent ongoing update o f local and global configurational orientations.