Blog posts
Crack penetration in cohesive zone models
Hi all,
I am conducting some cohesive crack simulations within the framework of XFEM. The cohesive model is an initially rigid traction-separation law for mode I. In order to deal with negative values of the normal sepration/jump, I use a penalty stiffness K.
periodic boundary conditions in ABAQUS 6.9-1
Hi
I have a problem with applying periodic boundary condition. I have used *EQUATION in constraints for opposite nodes and surfaces. But I still have some problem with that for sure I making some simple mistake. If anyone could look at my model and find problem. Abaqus version 6.9-1 .
Thanks a lot.
Indentation of polydimethylsiloxane submerged in organic solvents
This paper uses a method based on indentation to characterize a polydimethylsiloxane (PDMS) elastomer submerged in an organic solvent (decane, heptane, pentane, or cyclohexane). An indenter is pressed into a disk of a swollen elastomer to a fixed depth, and the force on the indenter is recorded as a function of time. By examining how the relaxation time scales with the radius of contact, one can differentiate the poroelastic behavior from the viscoelastic behavior. By matching the relaxation curve measured experimentally to that derived from the theory of poroelasticity, o
BUCKLING OF A COMPOSITE TUBE
hello my dear friends
i have a small problem, being fresher in ANSYS i couldnt solve the buckling problem can any one help me out
i have made the following APDL text
Slope of Contact force Vs time curve too steep.
Dear all,
I did a 3 pt bending impact simulation with an elasto plastic model. But the slope of contact force vs time curve is too steep at the beginning of the impact. One trivial way of reducing the slope is by reducing the young's modulus of elements in the vicinity of contact or the impactor. Also reducing the mass of the impactor and the impact velocity did not help in reducing the slope.
Is there any other non-trivial parameters that controls the slope of contact force vs time plot? Thanks ina dvance.
Non-linear buckling
I solved the mode shape of the clamped-pinned boundary conditions, a undefined parameter, 'c' is appearing in the mode shape of the coloumn.
Query:1) Could anyone would like to discuss on this undefined parameter, 'c'. it is critical to define the final modeshape of the column.
Non-linear buckling.
how to get the coordinates of nodes in the subroutine VDLOAD?
Hi, all,
I am writing one code of VDLOAD, I want to know how to get the coordinates of nodes in VDLOAD. Is it right to call one subroutine to get the coordinates of nodes in VDLOAD? but I don't know which subroutine is the right one.
thanks
Liu
Mechanics of Materials: Textbook Recommendation
I will be teaching a sophomore level class mechanics of materials class. The class will cover mechanics of basic strength of materials (e.g. beams, pressure vessels), but I also want to teach basic elements of failure mechanics (fracture, fatigue, plasticity, and wear.) I'm looking for a recommendation of an undergrad mechanics textbook that covers the fracture, fatigue, plasticity, and wear. The students will have had a statics and mechanics class and their textbook already covers strength of materials. Thanks.