Constitutive models for rubber XI : proceedings of the 11th European Conference on Constitutive Models for Rubber Nantes France 25 27 June 2019 Constitutive Models for Rubber XI is a comprehensive compilation of both the oral and poster contributions to the European Conference on Constitutive Models for Rubber. This 11th edition held in Nantes (France) 25 27th June 2019 is the occasion to celebrate the 20th anniversary of the ECCMR series. Around 100 contributions reflect the state of the art in the mechanics of elastomers. They cover the fields of: Material testing Constitutive modelling and finite element implementation Micromechanical aspects and Durability (failure fatigue and ageing) Constitutive Models for Rubber XI is of interest for developers and researchers involved in the rubber processing and CAE software industries as well as for academics in nearly all disciplines of elastomer mechanics and technology