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Eigen strains- i happen to come across while i was reading some material on material interfaces and inclusions. For the homogeneous part of the material the energy is due to e0. while for the inclusion or interface we have energy coming due to et which is eigen strain. So i had a question whats...

WHAT IS EIGEN STRAIN HOW TO FIND EIGEN STRAIN? Raj

Dear all. Iam trying to model a Steel open box girder section with a concrete deck slab in NASTRAN. I need to perform Nonlinear analysis for the Box girder. We are aware that Modulus of concrete in P-Delta behavior and M-Phi behaviour are different. From this prespective please let me know what...

To what extent will the refinement by Node movement Help in improving the solution. Any Litreature or reference please suggest thanks in adv raj Raj

In using 4 noded non conforming element forplate bending it is said that it "Locks". How is locking associated with energies. Will adaptive refinement help me inpreventing Locking? Will adpative refinement reduce zero energy modes? In computing the energy of the system should i leave out the...

The next international conference on Computational and experimental engineering and sciences will be held at IIT Madras, India, from December 1-6. All those who are intrested can register and atttend the sessions. More infor available at www.icces.org and also at www.icces-india.org Raj

h- size of element? is ambigious for quads or tets or iso curved elements? Do u know how to compute "h" for quads and solids esp tets and curved solids?? can any body tell on this

How can we compute the order of converegence when we have a combined adaptive refinement strategy like r-p, or h-p or r-h thanks in advance regds raj

Hi all, Why are the shape functions for 6 noded triangular element ( Linear strain triangle) written in natural coordinate system. Can any one let me as to where i can find the shape functions for Linear strain triangle in terms of cartesian coordinate systemt thanks and regds raj Raj

Greetings I want to implement an r-refinemnt technique, where can i get information on basis of r- refinement. Raj

Greetings I have a CST 3 noded element(1-4-5) connected on one of its sides to a bilinear 4 noded quadrilateral(1-2-3-4) as shown in figure below. I have the following queeries 1) The DOFS of both elements are same ( 2 DOFS per node) can add the stiffness contributions coming from CST And QUAD...

Greetings How can i compute FE Discretization error using the Variational formulation of governing equaions? How does this change in the context of an residual or recovery type estimator thanks in adv regds Raj

If u are using an Hierarchial estimator u can go in for p refinement raj Raj

2 way ribbed slab design ....refer to Advanced RCC design by N Krishnaraju ( I belive its TMG publication) regards Raj

Analysis and Design of RC shell roofs by RAMASWAMY S Analysis and Dsign of RC Shell rofs by Chandershekhar are the two good books (must read) . As far as design is concerend i have heard and i belive its recomeended only to perform an analysis using staad and not design . desin it manually with...

Bradh : Did u check that paper. If u havent then just have a lookin to this book " Mechanics in MAterial space " with Applications to Defect and Fracture MEchanics by Reinhold Kienzler and george Herrmann regds raj Raj

BRadh please refer IJNME 2002 volume 53 page number 1557-1574 On configurational forces in context of FEM by Mulleret al regds Raj

Please see the following thread on "corner stresses" thread727-46576 It might help you. regds Raj

Greetings I have limited idea . I belive this would work. Alternative 1) AT renterant corners u need to adpatively refine your mesh either follow a h-refinement or a p-refinement so thatu reach a reasonably corect solution for stress. since wwe cannot find the error in computed solution at...

Greetings, Iam trying model a Lap joint with High strength frcition grip bolts in Nastran. My intrest is to get the frictional frces developed between the two plate interfaces. Could any one suggest me as to how i can go about modelling and what element i need to use for the same. The plates are...