education

Hi
all,

 I
am an ABAQUS novice working on a graduation project.  My model is a
reinforced concrete Tee-joint with steel rebars and stirrups embedded to the
concrete.  The concrete is modeled using the Damage-Plasticity model, with
mostly default suggested values.  The elastic and plastic values are
derived from experimental values.  In addition to the embeddment, the
column and the beam is tied together using the tie command.  The model is
subjected to an axial load as well as a displacement force. 

I am teaching mechanics of materials to sophomore. However, our students do not have a separate static course. They get a some exposure to free body diagrams in particle dynamics. I am currently using the book by Gere and Goodno. But I found that both the teaching and learning experience were not good. Thanks a lot in advance for your suggestions!

Wenbin  

Hi all,

I have come across the two relations where aim to describe the isotropic hardening of a material

Power law:

R = Kε_pⁿ R is the variation in stress from initial yield, ε_p is the plastic strain where K is the strenght coefficient and n is the strain hardening exponent as observed in Ramberg Osgood equations.

Exponential law:

R = R_∞ [1-e^(-bεp)] where R_∞ is the saturated value of the R variation, b is the rate at which the sauration is reached.

I have a question regarding the shape functions. Why the shape function is kept orthogonal to residue in Galerkin method? Looking forward to hearing from you all.