Note: Beginning in version 2020 of Abaqus, the LaRC05 criteria was added to *Damage Initiation.

In Abaqus/Standard 2017 a new composites failure criteria was implemented as a "built-in" user subroutine.  This composites failure criteria was originally developed at the NASA Langley Research Center (thus the name LaRC).  The LaRC composites failure model has been evolving over more than a decade, and has taken names such as LaRC03, LaRC04, and LaRC05 (see papers listed below for more information).  A team lead by Professor Silvestre Pinho, Imperial College London, used the LaRC05 failure criteria in the WWFE-II exercise, and that work is summarized in the last two papers shown below.

 The implementation in Abaqus/Standard 2017 is in two forms:

UVARM -A damage criteria evaluation via a built-in UVARM subroutine

UDMGINI - A damage initiation criteria for XFEM enriched elements via a built-in UDMGINI subroutine.

More details are included in the attached pdf file named QA046225_LaRC05.pdf  This doc comes from the KB article of the same name.

Some sample files that come from our QA testing are attached in the file LaRC05_input_files.zip

 http://www.failurecriteria.com/theworldwidefail.html

LaRC03: 

Davila, Camanho, "Failure Criteria for FRP Laminates in Plane Stress", NASA/TM-2003-212663, 2003

Davila, Camanho, Rose, "Failure Criteria for FRP Laminates", Journal of Composites Materials, Vol. 39, No. 4, 2005

LaRC04:

Pinho, Davila, Camanho, Iannucci, Robinson, "Failure models and criteria for FRP under in-plane or three-dimensional stress states including shear non-linearity", NASA/TM-2005-213530, 2005

LaRC05 / WWFE-II:

Pinho et al., “Material and structural response of polymer-matrix fibre-reinforced composites”, Journal of Composites Materials, Vol 46 (19-20), 2012, pp. 2313–2341.

Pinho et al., “Material and structural response of polymer-matrix fibre-reinforced composites: Part B”, Journal of Composites Materials, Vol 47 (6-7), 2013, pp. 679-696.