research
Lemaitre damage material model
The Lemaitre damage material model was developed by Lemaitre for an isotropic linear elastic virgin material with stress-strain law as follows
\begin{equation}
\label{eq:22}
\sigma_{ij}=(1-D)C_{ijkl}\epsilon_{kl} \quad D\in[0,1]
\end{equation}
where $D$ represents the extent of damage with the damage evolution law
\begin{equation}
\label{eq:23}
D(\bar{\epsilon})=1-(1-A)\epsilon_{D_{0}}\bar{\epsilon}^{-1}-Ae^{-B(\bar{\epsilon}-\epsilon_{D_{0}})}
\end{equation}
Influence of Interfacial Delamination on Channel Cracking of Brittle Thin Films
H. Mei, Y. Pang, and R. Huang, International Journal of Fracture 148, 331-342 (2007).
Following a previous effort published in MRS Proceedings, we wrote a journal article of the same title, with more numerical results. While the main conclusions stay the same, a few subtle points are noted in this paper.
Viscoelastic Standard Linear Solid in ABAQUS
I'm trying to implement the standard linear solid (Maxwell form) in ABAQUS. I can't find anything on how the 3 constants of the SLS model get input into ABAQUS in terms of the g_i's, k_i's, and tau_i's ABAQUS uses. For example, in a relaxation test, the modulus is given by Y(t) = C_1 + C_2*exp(-C_2*t/C_3), where the C_i's are the constants. I don't know if the standard linear solid makes any assumptions about deviatoric vs dilatational behavior. Does anyone know how to do this? -Thanks, Roman
Rippling and a phase-transforming mesoscopic model for multiwalled carbon nanotubes
Dear colleagues,
I would like to share the following paper, in press in the Journal of the Mechanics and Physics of Solids. It can be found at the publisher's web at
http://dx.doi.org/10.1016/j.jmps.2007.10.001
A preprint is also attached below.
Abstract
3d crack in pressure vessel
hi
i am mani. i am doing my research work in fracture mechanics area. i am struggling with modelling of crack and crack propogation in pipes. if any one know about this please contact this e mail