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contact problem

Submitted by fluttermech on

hi all,

my name is christian, i'm a master degree student in mechanical engineering. i've been doing a swaging  process simulation using MSC.MARC, but i have a problem.when i ran the simulation, there were some node or element that penetrated into the other element and/or rigid body. i tried to change the value of contact tolerance and mesh, but i got the same result (pentrated still happened). what should i do to solve this problem?should i use mesh adaptivity? please help me ^^

 

 

Post-Doctoral Position in Nanostructured Solar Cells

Submitted by cmmlab on

The Microelectronics Research Center at the University of Texas at Austin has an immediate opening for a Post Doctoral Researcher in the area of nanostructured solar cells. It is desirable that an applicant have experience and interest in topics related to basics of solar cell design, fabrication and testing. Applicants from related areas such as optoelectronics or nanoelectronics will also be considered provided they have experience in device design, fabrication and testing. A successful candidate must hold a doctorate degree in Engineering, Applied Physics or other related areas.

Post-Doctoral Position in Large Area Nanofabrication of Quantum Dots

Submitted by cmmlab on

The Microelectronics Research Center at the University of Texas at Austin has an immediate opening for a Post Doctoral Researcher in the area of large area nanofabrication of quantum dots. It is desirable that an applicant have experience and interest in topics related to nanolithography, reactive ion etching of deep nanostructures, and nano-scale material characterization. A successful candidate must hold a doctorate degree in Engineering, Applied Physics or related fields.

How to import a matlab cuve into COMSOL for further constructing geometry model?

Submitted by Xiaofan GOU on

I created a curve (1D) by matlab. then i want to import it to COMSOL, and based on it for further constructing geometric model. does anyone know how to import this curve to COMSOL?

P.S. I used COMSOL3.5a with MATLAB. 

 Thanks.

 Xiaofan 

Viscoelastic material model in abaqus-am i taking the correvt approach

Submitted by FYPNoddy on

Hi all,



I have been trying to gain an understanding of representing a viscoelastic material in abaqus. To do this i have been trying to represent polypropylene using data obtained from creep curves found in literature (attached). To now what i have been doing is the following: Note i am using Abaqus 6.7



In material manager: selecting Elastic-inputting Instantaneous Youngs Modulus, E, Poissons, v, (E=1.8GPa, v=0.4) and setting the moduli time scale to instantaneous. And Viscoelastic-Domain:Time, Time=Creep Test data and inputting Shear Test Data

New idea in fatigue problems

Submitted by uni_students2009 on

there are two analytical concepts that are very important in fatigue failure.the first one is crack closure and the others is residual stress .the first one is in behind of crack and the other emphasis in the front of crack tip. the question is if we use some devices such as AFM/SEM is it possible we model the energy filed during fatigue process?   if this idea can be investigated the second question can be asked: is there any similarity to model for different loading conditions? 

 

I appreciate if you also put your comment in my idea?

 

Mechanics of Soft Materials: Lecture Notes

Submitted by Konstantin Volokh on

I finished the grad course on Mechanics of Soft Materials. It took 14 weeks with 2 academic hours per week and it covered the following topics: 1 Tensors 2 Kinematics 3 Balance laws 4 Isotropic elasticity 5 Anisotropic elasticity 6 Viscoelasticity 7 Chemo-mechanical coupling 8 Electro-mechanical coupling.

I attach the class notes and I will be grateful for the remarks, corrections, and criticism from iMechanicians.

Summer School on Fracture - June 7-18, 2010, Cargese

Submitted by Ravi-Chandar on

A Summer School on Fracture will be held at the Institut d’Etudes Scientifiques de Cargese, in Cargese, from June 7 to June 18, 2010. This is jointly organized by Elisabeth Bouchaud, CEA Saclay and Krishnaswamy Ravi-Chandar, University of Texas at Austin. Details of the School can be found at http://www.ae.utexas.edu/SummerSchoolFracture/