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Fatigue crack propagation

Submitted by Lazuardi Pujilaksono on
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fatigue crack propagation
Plasticity
Fatigue
crack
uhmwpe
fatigue crack

Hi, I'm trying to perform a supposedly-simple experiment on fatigue crack propagation of UHMWPE. I use a compact-tension specimen on a servopulser hidraulic testing machine. I will try to do the experiment on a fix Pmax with a varied force ratio (R) from 0.1 to 0.5. I'm having trouble in deciding the maximum force Pmax. How does one decide the amount of force applied for FCP testing? Calculation steps and so on.

Time-dependent deformation behavior of polyvinylidene fluoride binder: Implications on the mechanics of composite electrodes

Submitted by Siva P V Nadimpalli on
research
thin film
lithium ion batteries

Time-dependent deformation behavior of polyvinylidene fluoride binder: Implications on the mechanics of composite electrodes (http://www.sciencedirect.com/science/article/pii/S0378775316312721)

Arnuparp Santimetaneedol, Rajasekhar Tripuraneni, Shawn A. Chester, Siva P.V. Nadimpalli 

Compatible-Strain Mixed Finite Element Methods for 2D Compressible Nonlinear Elasticity

Submitted by arash_yavari on
research
Mixed finite elements; finite element exterior calculus; nonlinear elasticity; geometric mechanics; Hilbert complex

In this paper, using the Hilbert complexes of nonlinear elasticity, the approximation theory for Hilbert complexes, and the finite element exterior calculus, we introduce a new class of mixed finite element methods for 2D nonlinear elasticity -- compatible-strain mixed finite element methods (CSFEM). We consider a Hu-Washizu-type mixed formulation and choose the displacement, the displacement gradient, and the first Piola-Kirchhoff stress tensor as independent unknowns. We use the underlying spaces of the Hilbert complexes as the solution and test spaces.

How to know the element number within an hetval subroutine

Submitted by Fausto Tucci on
research
abaqus HETVAL element number

Hi everybody

I'm a new user of abaqus and I'm trying to describe the heat generation in a changing phase thermoset polymer using abaqus user subroutine HETVAL. I need for my computations the current element number (in such a way that I can find the adjacent elements in the connectivity matrix).

Does anyone have any suggestion?

Thank you

Eigenvalue buckling analysis of cracked functionally graded cylindrical shells in the framework of the extended finite element method

Submitted by Amir Nasirmanesh on
research

Hi everybody

My new paper on the buckling behavior of cracked FGM shells has been published in the Composite Structures.

I would be very happy to answer any further question.

I attached the pdf file of the paper to this blog.

Publication

Submitted by mohammedlamine on
research

Hi all,

I am pleased to post the references of my recent paper entitled :

"CONTRIBUTION TO BRIDGE DAMAGE ANALYSIS" Mohammed Lamine MOUSSAOUI, Abderrahmane KIBBOUA, Mohamed CHABAAT

APPLIED MECHANICS AND MATERIALS Journal,

Volume 704 (2015) pp 435-441

DOI: 10.4028/www.scientific.net/AMM.704.435

 

N.B: The equation (7) has been reviewed with:

[P2](nxg)=[[I](nxn)| [0](nxf)]

and is available at:

Does internal heat transfer attribute work with VUMAT subroutine?

Submitted by abhime07 on
research

I am running J-C plasticity VUMAT subroutine and trying to club inbuilt heat transfer attributes for temperature update, but it's not working. I would appreciate if someone can advise me if there any way to club inbuilt heat transfer with VUMAT or I have to write separate subroutine? 

Thanks & Regards,

Abhishek

Soft mobile robots driven by foldable dielectric elastomer actuators

Submitted by Jinxiong Zhou on
research
dielectric elastomers
soft robotics

A cantilever beam with elastic hinge pulled antagonistically by two dielectric elastomer (DE) membranes in tension forms a foldable actuator if one DE membrane is subject to a voltage and releases part of tension. Simply placing parallel rigid bars on the prestressed DE membranes results in enhanced actuators working in pure shear state. We report design, analysis, fabrication and experiment of soft mobile robots that are moved by such foldable DE actuators.

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