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Simple beam bending FEM vs. theory comparison error

Submitted by Raymond C. Singh on
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Ask iMechanica

I am having some trouble getting accurate values for max. stress and max. deflection for an FEM model of a simply supported I-beam in bending. I am using I-DEAS 12 NX to solve the model. I'm pretty new to finite element analysis as a whole, but I know that getting any more
than 10% error (relative to Euler beam theory) in max deflection or stress for a 60x10x8 in. should not happen. Strangely enough, using the same boundary conditions and meshing techniques for a 60x10x8 in. rectangular solid, I find the results I was expecting. Here are some more details:



How can I find material properties of metallic glasses?

Submitted by Yixiang Gan on
metallic glass
creep deformation

I am now going to model a sample with metallic glass (Cu-Zr-Ti) under stress and temperature loads. I wonder whether there is some existing database to find material properties, in particular, the creep properties with respect to temperature and stresses. Then I can use these data as input for a FE analysis.

Thank you very much!

how to simulate fibre direction?

Submitted by yongtao lu on
research
User subroutines in ABAQUS
fibre

Hi all

 I am modeling a complex muscle with fibre reinforced. The fibre direction is not constant in this muscle. It is changing with the integration point in the model. Is there anyone who got idea on how to simulate the variable fibre directions in Abaqus?  Can user subroutine ORIENT do this?

 Many thanks,

Ben

Cardiff University

 

Electromechanical screw driven Tensile machine

Submitted by aniruddha on
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education

I would like to know what is the role of data sampling, data capture rate and bandwidth in case of electromechanical static tensile test. What are their optimum values for a static tensile test of metals according to ASTM standards.

We are deciding to buy Instron 5567 series for 50kN. But we are unable to decide whether that high data acquisition rate, bandwidth is required. Please suggest.

interfacing between matlab and ansys

Submitted by sabareesme on
research

i have an optimization program for structural problem in Matlab software. i found design variables from  Matlab. i want to interface this program in to ansys softare to find optimum stress and strain. how can i interface matlab program in to ansys. if any sample tutorilas please send me. 

Making the Right Moves

Submitted by Roozbeh Sanaei on

 

Making the Right Moves: A Practical Guide to Scientific
Management for Postdocs and New Faculty

Based on courses held in 2002 and 2005 by the Burroughs Wellcome Fund and
HHMI, this book is a collection of practical advice and experiences from
seasoned biomedical investigators. The second edition contains three new
chapters on laboratory leadership, project management, and teaching and course
design.

Postdoctoral position in multiphysics and nanoscale mechanics modeling

Submitted by Harley T. Johnson on
job

A postdoctoral research position is available immediately in the Johnson research group at the University of Illinois at Urbana-Champaign.  The position will involve continuum finite element modeling of multiphysics and interfacial phenomena in micro- and nanoscale electronic materials processing applications.

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