I have been compiling some notes on Abaqus which I use frequenctly both in my research and teaching
Abaqus notes update-> link
Collection of some useful Abaqus tutorials from Prof. David Henann's and Prof. Allan Bower's lectures at Brown University
Trusses and Beams [pdf]
Plane problems [pdf]
3D problems [pdf]
Contact [pdf]
Natural frequencies and Buckling [pdf]
Dynamics I [pdf]
Plasticity [pdf]
User subroutines in Abaqus -> The user subroutine functionality in Abaqus is a powerful tool in the analysis. It is very useful to simulate different material models, develop new elements, and solve mutiphysics problems. The most common user subroutine in solid mechanics is UMAT which is capable of simulating user defined constitutive laws. UMAT is implicit and , Abaqus also provides explicit equivalent of the UMAT, and is called VUMAT which can be useful in complex constitutive models. The other commonly used user subroutine is UEL (user element) which is used to write special elements that are not available in the Abaqus library or to solve a mutliphysics problem. All these user subroutines are written in Fortran programming language. For this purpose the Abaqus needs to be integrated with the visual studio and intel fortran complier.
Some example material subroutines for instructional purpose
Linear elastic [umat] [input file]
Python scripting in Abaqus - > Abaqus scripting interface is an extension of python object orientated programing. It's a powerful tool to automate both pre- and post processing operations. It can be used to create and modify components of Abaqus model like parts, material properties etc, submit jobs, reading from and writing to output database. There are several ways to run python scripts in Abaqus.
Short tutorial on Abaqus python scripting [link]