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Hi

how can i set failure criteria for composites when doing there impact test in ansys LS-DYNA

I read in the Abaqus documentation that a Coupling Constraint couples the motion of a surface to the motion of a single point.  I am modeling 1/8 of a square bar using symmetry wrt 3 planes at the origin (0,0,0). The free end of the bar is a surface perpendiclar to the X global axis. I define a ref point at (L,0,0,) where L is the length of the bar. Then I use the coupling constraint to `couple' the dof U1 at the surface at X=L to the ref point. I apply a single load CF1 at the ref point. The surface should move along X without rotating. It rotates !!! What have I done wrong ???

Dear all,

This is my first post in iMechanica forum.

I am trying to some simulation of cantilever beam bending in abaqus. Since the aspect ratio is pretty low (height/diameter~=2), I use 3D solid element instead of 2D beam element to construct the beam. I set the deflection at the free-end as the boundary condition, and try to solve the reaction force (perpendicular to the beam longitudinal axis). But I get in trouble to calculate the total reaction force at the free-end.

I'm Modelling a Beam Column Joint in ANSYS.

THe Concrete Element has been Modelled using SOLID 45 element & Steel Rebar using LINK 8 Element

The Volume has been meshed suitably

The rebar (LINK 8) is created in between the nodes, created as a result of meshing Volume.

I would like to know the procedure for copying the same elements (LINK8) at suitable intervals so as to get the desired arrangement of longitudinal reinforcement as in the real beam / column.

Hi

I am using ABAQUAS to model a RC beam. I encountered a warning as follows which means that the reinforcement is not modelled in the host element:

1668 nodes on an embedded element do not lie in any host element. Check coordinates, exterior tolerance and absolute exterior tolerance parameters, and the host element set definition. The nodes have been identified in node set ErrNodeEmbeddedNode.

I appreciate any help to this problem, also, Is there any other ways for modelling reinforcement in ABAQUAS.

Thanks a lot.

any ideas? :(

 At first I thank and from this position George Mokios and Louie Yaw,

for their help in my previous post.

Trying to figure what is going on, a new query came up.

Suppose we have the rod but now rested on just one table.

[

See here for the figure 

https://sites.google.com/site/physicseuler/genike-physike/Doc2.doc?attr…

] 

I want to do nonlinear buckling of simple cylinder by applying external pressure. I am activating only "large displacement static" option in ansys and apply load in substeps. But after solution is done, how to get buckling pressure??

For linear/eigen value buckling, it is very simple. After solving, in general postprocessor menu, buckling modes are displayed in "results summary".

Please tell me, for nonlinear buckling???

Hello.

I am a physics teacher who work also as a researcher in applied mechanics (gradient elasticity and couple stress elasticity).

Nevertheless, I must admit that I have some serious gaps in basic

mechanics of materials theory.

Recently a student of mine, came up with the following query:

"Let a rod of weight w and length L is supported by two tables. Half of the rod is suported by one of the table and L/4 of the rod is supported by the other table. Find the forces that the rod is acted upon by the tables."