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Elastomer materials are a group of materials with visco-elastic properties. Due to these properties under loading energy dissipation occurs leading to a dissipative heating. This effect has to be taken into account especially analysing the damage process of these material. Most of the concepts for tear fatigue analysis are based on the (hyper)elastic material laws which do not take dissipation effects into account. In the present study the dissipation effects are analysed from mechanical and thermodynamical point of view. The experiments were done under complex loading to simulate near realistic loading conditions. Correlations between multiaxial loading, mechanical work, heat transfer, dissipated energy and internal energy are discussed for undamaged and damaged specimen, Elastomer materials are a group of materials with visco-elastic properties. Due to these properties under loading energy dissipation occurs leading to a dissipative heating. This effect has to be taken into account especially analysing the damage process of these material. Most of the concepts for tear fatigue analysis are based on the (hyper)elastic material laws which do not take dissipation effects into account. In the present study the dissipation effects are analysed from mechanical and thermodynamical point of view. The experiments were done under complex loading to simulate near realistic loading conditions. Correlations between multiaxial loading, mechanical work, heat transfer, dissipated energy and internal energy are discussed for undamaged and damaged specimen