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Geometric Stiffness Matrix

Submitted by SivaSrinivasKolukula on
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education

Hi all

            I want to know about Geometric Stiffness Matrix. When we calculate the stiffness of a body when the body is deformed then the stiffness called geometric stiffness. I have refered few books but I could not get the satisfactory details. I want to find the geometric stiffness of a fluid. I dont have any idea about geometric stiffnes. Any reference for this? Any article which explains this?

Sreenivas

AISI 4150 or DIN 50CrMo4 Steel Flow Stress Curve Data for Machining Simulation

Submitted by ashwin.devotta on
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Machining simulation
flow stress curve
AISI 4150 Steel
DIN 50CrMo4 Steel
Johnson Cook Model

Hi All,

I am into machining simulation of 50CrMo4 Steel in DEFORM 3D and I need the flow stress curve data for various temperature and various strain rates. I have searched in as many journals as possible, but in vain. It would be of immense help if some one could share the material model data with me.

Thanking you in advance

With Best Regards

Ashwin Devotta

ashwin.devotta [at] gmail.com 

The J integral

Submitted by Zhigang Suo on
fracture mechanics
ES 247
Spring 2010
Spring 2014

For a crack in an elastic body subject to a load, the elastic energy stored in the body is a function of two independent variables: the displacement of the load, and the area of the crack. The energy release rate is defined by the partial derivative of the elastic energy of the body with respect to the area of the crack.

Postdoctoral Research Position in Molecular Dynamics Simulation at IHPC, Singapore

Submitted by Qing Xiang PEI on
job

We are seeking outstanding candidates for a Postdoctoral Research Associate Position at the Institute of High Performance Computing, Singapore. The position requires a Ph.D degree in physics, chemistry, materials science, chemical engineering, mechanical engineering or equivalent experience.

Additional requirements include:

. Knowledge in mechanics of materials

Austenite-Martensite Interface in Shape Memory Alloys

Submitted by jiangyuli on
research

This is a preprint that is going to appear on Applied Physics Letters. It is somewhat related to a paper by Kaushik Dayal on complex crystalline structure via phase field simulation that was posted here. 

 

Austenite-Martensite Interface in Shape Memory Alloys

C. H. Lei, L. J. Li, Y. C. Shu, and J. Y. Li

Abstract

Stiffness with loss of material

Submitted by vishnusworld on

Dear All

I am modeling a workpiece supported in fixtures and being machined. I use the FEM ( Ansys) to simulate this set up. I need to know at the stiffness of wp at the wp-fixture contact point  . Stiffness is found by applying unit force at one contact point while fixing all others.. Inverse of displaceemnt gives the stiffness in that direction. I have two questions reg this.

Joint PhD Program: University of Minnesota (USA) - Ecole Polytechnique (France)

Submitted by Cédric Bellis on
job

The Department of Civil Engineering of the University of Minnesota (USA) and the Solid Mechanics Laboratory of the Ecole Polytechnique (France) have established a joint PhD program in Civil Engineering.

Please, see the document attached for a detailed description of the program, host institutions and participating faculties.

Nonlocal Damage implementation using ABAQUS UEL

Submitted by hadi on

Hi everyone,



In order to simulate nonlocal damage in trabecular bone structures in
ABAQUS, I need to implement the constitutive laws into the user element
subroutine (UEL), since it is not possible to implement nonlocal FE in
UMAT, as far as I know!



I would be very much grateful if someone, who has experience in this
regard, esp how to implement 3D elements, e.g. C3D8, into a UEL code,
shares some knowledge.



Best,



Hadi

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