1. Institute of MechanicsChair of Continuum Mechanics and Constitutive TheoryTechnische Universität BerlinEinsteinufer 5 10587 Berlin Germany
2. Institute for Problems in Mechanical EngineeringRussian Academy of SciencesBol'shoy pr. 61, V.O. 199178 St.‐Petersburg Russia
3. Institute for Problems in Mechanical EngineeringPeter the Great Saint‐Petersburg Polytechnic UniversityPolitekhnicheskaja 29 195251 St.‐Petersburg Russia