Key result
Monte-Carlo simulations of PDMS networks demonstrated that finite extensibility of network chains causes non-affine deformation and reduces network modulus at moderate macroscopic strains.
Monte-Carlo simulations show that finite extensibility of network chains causes non-affine deformation, explaining deviations from Gaussian network behavior without invoking a transition from affine to phantom chain behavior.
Finite extensibility may explain non-Gaussian deviations in PDMS networks; leaves open experimental validation before guiding elastomer design.
Monte‐Carlo simulations of the elastic behaviour of PDMS networks, using a realistic (R‐I‐S) network‐chain model, are able to reproduce experimentally observed deviations from Gaussian network behaviour in uniaxial extension. The finite extensibility of the network chains is shown to cause non‐affine deformation of the mean‐square network‐chain end‐to‐end distance, even at moderate sample deformations (λ≈1.5). An increase in the proportion of fully‐extended chains with increasing macroscopic strain gives rise to a steady decrease in the rate of network free‐energy change, causing a reduction in the network modulus at moderate macroscopic strains. There is no need to invoke a transition from affine to phantom chain behaviour as deformation increases.
No takes yet. Share an insight, caveat, or question.
Stepto et al. (1995) studied this question. Monte-Carlo simulations using a realistic (R-I-S) network-chain model was evaluated on Elastic behaviour in uniaxial extension. Monte-Carlo simulations of PDMS networks demonstrated that finite extensibility of network chains causes non-affine deformation and reduces network modulus at moderate macroscopic strains.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: