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rAKA/doc/manual/manual-appendix-materials-cohesive.tex
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manual-appendix-materials-cohesive.tex
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\section{Cohesive linear}
\begin{MaterialDesc}{cohesive\_linear}{ssect:smm:cl:coh-snozzi}
\matparam{sigma\_c}{Real}{Critical stress $\sigma_\mathrm{c}$}\\
Either G\_c and kappa or, G\_cI and G\_cII or delta\_c have to be specified
\matparam{G\_c}{Real}{Mode I fracture energy}
\matparam{kappa}{Real}{$\kappa = G\_cI / G\_cII$ parameter (default 1)}
\matparam{G\_cI (G\_cII)}{Real}{Mode I (II) fracture energy}
\matparam{delta\_c}{Real}{Critical displacement $\delta_\mathrm{c}$}
\matparam{beta}{Real}{$\beta$ parameter (default 1)}
\matparam{penalty}{Real}{penalty coefficient for compression $\alpha$ (optional; default 0)}
\matparam{volume\_s \& m\_s}{Reals}{optional; to adapt statistical distribution following~\cite{Zhou_Molinari_2004}}
\matparam{contact\_after\_breaking}{bool}{Activation of contact when the elements are fully damaged (default false)}
\matparam{max\_quad\_stress\_insertion}{bool}{Insertion of cohesive element when stress is high enough just on one quadrature point (default false)}
\end{MaterialDesc}
\section{Cohesive bilinear}
\begin{MaterialDesc}{cohesive\_bilinear}{ssect:smm:cl:coh-snozzi}
\matparam{sigma\_c}{Real}{Critical stress $\sigma_\mathrm{c}$}
\matparam{delta\_0}{Real}{Elastic limit displacement $\delta_0$}\\
Either G\_c and kappa or, G\_cI and G\_cII or delta\_c have to be specified
\matparam{G\_c}{Real}{Mode I fracture energy}
\matparam{kappa}{Real}{$\kappa = G\_cI / G\_cII$ parameter (default 1)}
\matparam{G\_cI (G\_cII)}{Real}{Mode I (II) fracture energy}
\matparam{delta\_c}{Real}{Critical displacement $\delta_\mathrm{c}$}
\matparam{beta}{Real}{$\beta$ parameter (default 1)}
\matparam{penalty}{Real}{Penalty coefficient for compression $\alpha$ (optional; default 0)}
\end{MaterialDesc}
\section{Cohesive linear with friction}
\begin{MaterialDesc}{cohesive\_linear\_friction}{ssect:smm:cl:coh-friction}
\matparam{sigma\_c}{Real}{Critical stress $\sigma_\mathrm{c}$}\\
Either G\_c and kappa or, G\_cI and G\_cII or delta\_c have to be specified
\matparam{G\_c}{Real}{Mode I fracture energy}
\matparam{kappa}{Real}{$\kappa = G\_cI / G\_cII$ parameter (default 1)}
\matparam{G\_cI (G\_cII)}{Real}{Mode I (II) fracture energy}
\matparam{delta\_c}{Real}{Critical displacement $\delta_\mathrm{c}$}
\matparam{beta}{Real}{$\beta$ parameter (default 1)}
\matparam{penalty}{Real}{Penalty coefficient for compression $\alpha$ (optional; default 0)}
\matparam{volume\_s \& m\_s}{Reals}{optional; to adapt statistical distribution following~\cite{Zhou_Molinari_2004}}
\matparam{contact\_after\_breaking}{bool}{Activation of contact when the elements are fully damaged (default false)}
\matparam{max\_quad\_stress\_insertion}{bool}{Insertion of cohesive element when stress is high enough just on one quadrature point (default false)}
\matparam{mu}{Real}{Maximum attainable value of the friction coefficient, $\mu$ (default 0)}
\matparam{penalty\_for\_friction}{Real}{Penalty parameter for the elasto-plastic friction law (default 0)}
\end{MaterialDesc}
\section{Cohesive linear fatigue}
\begin{MaterialDesc}{cohesive\_linear\_fatigue}{ssect:smm:cl:coh-fatigue}
\matparam{sigma\_c}{Real}{Critical stress $\sigma_\mathrm{c}$}
\matparam{delta\_c}{Real}{Critical displacement $\delta_\mathrm{c}$}
\matparam{beta}{Real}{$\beta$ parameter (default 1)}
\matparam{G\_c}{Real}{Mode I fracture energy}
\matparam{kappa}{Real}{$\kappa$ parameter (default 1)}
\matparam{penalty}{Real}{penalty coefficient $\alpha$ (optional, default 0)}
\matparam{delta\_f}{Real}{Characteristic opening displacement $\delta_\mathrm{f}$ (see~\cite{vocialta15})}
\end{MaterialDesc}
\section{Cohesive exponential}
\begin{MaterialDesc}{cohesive\_exponential}{ssect:smm:cl:coh-exponential}
\matparam{sigma\_c}{Real}{Critical stress $\sigma_\mathrm{c}$}
\matparam{delta\_c}{Real}{Displacement at the peak traction $\delta_\mathrm{c}$}
\matparam{beta}{Real}{$\beta$ parameter (default 1)}
\matparam{exponential\textunderscore penalty}{Bool}{parameter to activate contact penalty following the exponential law (default true)}
\matparam{contact\textunderscore tangent}{Real}{ratio of the contact tangent over the initial exponential tangent (to be defined if exponential\textunderscore penalty is false; default 1.0)}
\end{MaterialDesc}
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