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18.104.22.168 Park Distortional
The material type for this relaxation function is “relaxation-Park-distortion”. The following material parameters need to be defined:
|<tau0>||Characteristic relaxation time||[t]|
|<beta0>||Power exponent at zero strain||[ ]|
|<tau1>||Characteristic relaxation time|
|<beta1>||Power exponent at zero strain|
The reduced relaxation function for this material type is given by where and The definition of is given in Section 22.214.171.124↑.