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effective properties of laminates

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Hi!

Is there any SIMPLE (direct) way to obtain effective properties of laminates in Abaqus?

Thanks in advance.

Kamil

effective properties of laminates

Hi!

Is there any SIMPLE (direct) way to obtain effective properties of laminates in Abaqus?

Thanks in advance.

Kamil

Coordinate system in Abaqus data file (*.dat)

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Dear all,

I have a question which seems quite simple but has troubled me for quite some time: 

I have a composite tube modeled using layered solid elements C3D8, and I want to output radial, circumferential, and axial stress components averaged at preselected nodes (defined as a node set) in Abaqus data file (*.dat). Nevertheless, I would like to have those stress components expressed in a cylindrical coordinate system, rather than in local material coordinate system. I would appreciate it a lot if anyone knows whether it is possible to do so. Thanks.

Abaqus Problem

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Sampling data from large numerical simulations - part 2

The new blog post discusses yet another application of the Linear Assignment Problem; in this case the use of the Hungarian algorithm for finding an optimal list of close data points to a set of point generated using Latin Hypercube sampling.  See http://www.parresianz.com//sampling/hungarian_algorithm/

-- Biswajit

Zhigang Suo's picture

RHEOLOGICAL MODELS

The attached notes are written for a course on plasticity.  When I update the notes, I will post a link on my twitter account:  https://twitter.com/zhigangsuo.  

Rheology is the science of deformation.  This science poses a question for every material:  Given a history of stress, how do we predict the history of strain, or the other way around?

Sampling data from large numerical simulations

Large numerical simulations lead to large data sets that typically need some sampling to make analysis tractable.  Check out my upcoming series of posts on the topic at http://www.parresianz.com//sampling/latin_hypercube_sampling/

-- Biswajit

Zhigang Suo's picture

FRAME INDIFFERENCE

The attached notes are written for a course on plasticity.  When I update the notes, I will post a link on my twitter account:  https://twitter.com/zhigangsuo.

Expectation of higher order moment (Bayesian Stats)

I am taking a course in Bayesian statistics, which is off my field. In the lecture notes, the instructor showed

E[X^2n] = (2n-1) σ^2n

and E[X^3 . Y] = E[Y^3 . X] = 3.ρ.σ^4  

where  σ = variance

E = expectation

X is a random variable.

ρ = cor(XY) = E[XY]/σ^2

Can anyone kindly explain how these equations were derived or atleast point me towards some text where I can understand this? Is this to do with the moment generating function?

Marginal Probability Density Function of Stochastic Process

I was solving the following question and I derived the Auto correlation function and proved that it is a WSS process. However, I am not sure how to go about finding the Marginal probability density function. Should I find joint probability of a and b and then find marginal probability of each random variable?

Limitations of using Reliability, Availability & Maintainability software applications for engineering asset management

Does anyone have experience in using RAMs software applications?

I am working on a paper that looks at the limitations of managing risk and improving reliability of engineering assets by using RAMs software applications but I have no experience in using any RAMs software application.

von Mises or Equivalent stress for Beam Elements

Are there analytical expressions for computing von Mises or equivalent stress at any point for Beam elements similar to the ones in continuum elements? I would like to design a structure with beam elements and ensure that the equivalent stress is within bounds (yield stress etc) for the structure to be safe.

Zhigang Suo's picture

Rigid-plastic flow

The attached notes are written for a course on plasticity.  When I update the notes, I will post a link on my twitter account:  https://twitter.com/zhigangsuo.

ahmedettaf's picture

Newmark Lecture 2014

Dear Colleagues,

Prof. Ole Sigmund from the Technical University at Denmark: http://www.topopt.dtu.dk/ was the presenter of the 2014-2015 Newmark Distingusihed Lecture which was given in the Civil Engineering Department at the University of Illinois Urbana Champaign. His presentation was titled: Topology Optimization: State of the art and future perspectives. You may find a link to the video lecture here

Open Pit Model Abaqus

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Hi guys, 

I'm new on iMechanica, well at least writing on it, I've been working on a project about geomechanics in order to get my mechanical engineer university degree. The thing is that I'm felling like I can't get all this stuff together, so I would like to ask some questions about my project (Abaqus model of an open pit mining scenario):

Bayesian inversion.

Can anyone kindly recommend any books or papers to read to learn the basics of Bayesian inversion methods?

Thank you very much.  

Zhigang Suo's picture

Nonlinear viscosity

The attached notes are written for a course on plasticity.  When I update the posts, I will write a note on my twitter account:  https://twitter.com/zhigangsuo.  

interaction of stress intensity factor for perpendicular cracks

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pls sugguest ur ideas and i need ansys procedure for this

interaction of stress intensity factor for perpendicular cracks

hai friends,

me doing engineering design... my project tite is "interaction of stress intensity factor for perpendicular cracks" this is y final yr project....pls guide me finding problem & knowing about the fracture mechanics and the purpose of stress intenssity factor..i really need the ansys analysis procedure for creating perpendicular cracks... pls help me friends ...send some link or web page ..

 PLS send details to my mail id    ashwin.prabhu1990@gmail.com  

contact no: 8015180689

thank you!!

2015 Summer Biomechanics Bioengineering and Biotransport Meeting

<p>Please join us at the Summer Biomechanics, Bioengineering and Biotransport Conference (SB3C2015), to be held at beautiful Snowbird Utah, July 17-20, 2015 (http://www.snowbird.com). The theme of the conference this year is <strong> Synergy of Modeling and Experiments in Biomechanics, Bioengineering and Biotransport </strong>.

DEFORM 3D- HOW TO APPLY BLANK HOLDER FORCE

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Hi guys,

I am all new user to deform 3d. from the past month i managed to learn a bit of that. now i can deform a sheet into a cup using a punch and die set. problem is there are wrinkles on the cup. how to apply blank holder force. Can any body explain in detail. plz help me so that i can finish my project.

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Book on elastic wave propagation

Our book Introduction to Elastic Wave Propagation, originally published by Wiley in 1994, is now in the public domain. The book is attached. We intended it to be suitable for a one-semester course or for self-study by students needing background on elastic waves. (The solutions to the exercises are included.) Chapter 1 can also be used as a concise introduction to linear elasticity.

Anthony Bedford (abedford@mail.utexas.edu)

Douglas S. Drumheller (dsdrumh@q.com)

Zhigang Suo's picture

Viscosity

The attached notes are written for a course on plasticity.  I will update new posts on my twitter account:  https://twitter.com/zhigangsuo.  

Zhigang Suo's picture

Strain hardening

The attached notes are written for a course on plasticity.  I will update new posts on my twitter account:  https://twitter.com/zhigangsuo.  Rheology is the science of deformation. This science poses a question for every material: given a history of stress, how do we find the history of strain?

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