Steinke, LeenaLeenaSteinkeWeltin, UweUweWeltinFlamm, MartinMartinFlammLion, AlexanderAlexanderLionCelina, MathiasMathiasCelina2024-02-232024-02-232011Constitutive Models for Rubber VII: 155-160 (2011)978-1-466-55399-6https://hdl.handle.net/11420/45954Ageing of elastomeric materials is an important subject in product development concerning lifetime prediction. Because of environmental influences like temperature, oxygen, radiation and similar conditions rubber and elastomers will change their material properties and hence affect the lifetime. The reason for this material change is the modification of the polymer network. In case of sulphur cured natural rubber it can result in hardening of the material and pronounced surface hardening for thick-walled products. This is known as the Diffusion-Limited Oxidation effect (DLO) when oxidation is the key environmental influence. This paper describes a model which is designed to calculate the change in network density caused by thermo-oxidative ageing and the required measurements for the parameterisation.enEngineering and Applied OperationsBook partOther