User login

You are here

opinion

Solid Mechanics mini project

Guys , we've been given a mini project of solid mechanics to make any simple model which shows movement . We're getting short of time so please .... Frown
I'm looking for some ideas of how and what to make .

zaphai's picture

Soil Structure Interaction

I am trying to model the soil churning action of a rotary tiller trough soil structure interaction. Based on some published articles, DEM and SPH approach both have been used to model the tool interaction with the soil. I am little confused in the selection of the appraoch. Can somebody throw some light on advantages and disadvantages of one approach over another and which approach should be chosen for more realistic results.

Hyperelastic and Viscoelastic material modelling

I have a doubt regarding the Hyperelastic and Viscoelastic material modelling in ANSYS using Mooney-Rivlin material constants.

ANSYS theory manual says that for large deformation and large strains, the material modelling (i.e. constitutive behaviour) is same for hyperelastic and viscoelastic. Is it so?

Generally,  Mooney-Rivlin material constants are used to model Hyperelastic behaviour (rubber-like materials).

A question on plasticity

Recently, I have a question on the plasticity.As the plastic materials undergo the loading and unloading process. we can find the energy dissipation from the stress and strain relation curve. Then, my question is that the energy dissipation is generated during the loading process or unloading process?Thank you very much.

 

Konstantin Volokh's picture

Challenge of Biomechanics


The application of mechanics to biology
– biomechanics – bears great challenges due to the intricacy of living things.
Their dynamism, along with the complexity of their mechanical response (which
in itself involves complex chemical, electrical, and thermal phenomena) makes
it very difficult to correlate empirical data with theoretical models. This
difficulty elevates the importance of useful biomechanical theories compared to
other fields of engineering. Despite inherent imperfections of all theories, a

Mike Ciavarella's picture

FOR A SOCIALLY RESPONSIBLE UNIVERSITY


Given the complexity of present and
future global challenges, it is the university´s social responsibility
to contribute to society by understanding the full extent of its needs
and current and future problems, and to prepare it to deal with them
effectively and efficiently (CMES, 2009)1. In this sense, due to its
ability to take the lead in matters of knowledge creation, promotion and
dissemination, the university becomes the ultimate guidance governments

What are my Open-Access options?

As many othes, I find myself in the position that my funding agency mandates some form of parallel publishing (or preferably OpenAccess) (as well as an Open Access policy from my university itself).

I've been reading through what author rights i retain with different publishers, and among the big ones very little rights are retained.
Elsevier allows preprints to be published only if it is voluntary. That is, they intentionally prohibit mandated parallel publishing to protect their profit.
Wiley had different rights with different journals, but my first hand choice simply didn't allow parallel publishing of any kind ever.

Guidelines for Suggesting Peer Reviewers for Manuscripts

As a journal editor, I am often surprised by some of the suggestions authors make for potential reviewers.  In some cases the suggestions are not very good, and on occasion authors do not suggest reviewers at all.  Some authors will even state explicitly that they cannot think of any reviewers, which is really surprising.   

Hooke's law

Choose a channel featured in the header of iMechanica: 

Upto what limit is hooke's law really obeyed ? some books say that hooke's law is obeyed up to the proportional limit, while some other books say that hooke's law is upto the elastic limit ? what is the correct answer?

Guanchu Cheng's picture

thermodynamics equilibrium state vs. steady state???

I am not clear about two concepts: thermodynamics equilibrium state and steady state. It's easy to conceive of the following different two osmosis processes regarding thermodynamics equilibrium state and steady state, respecitvely.

FEM analysis of composite plate in ANSYS

HI..

i am doing FEM analysis of composite plate[0/+45/-45/90]S in ANSYS. I just wanna now which material properties i have to give as input, lamina properties or laminate plate properties..??

waiting 4 an early response..

Regards

FURQAN

ahmadmec68's picture

thesis

hi everyone ,

im finding  the subject of my thesis(in master science) i will be glad if anyone offer me the subject with satisfactory future , my tendency is applyed mechanic in stress !

please explain about the future job,

thank you 

yosoufe's picture

Smart Headphone

Hi

I am thinking of a SMART HEADPHONE for people who are listenning to the music all the time for their saftey an their convenience and the people who tries to communicate with them. How SMART? The danger for such people is that they can not hear the alarm of the danger, like the horn of a vehicle. And also, sometimes they are called but they do not hear and consequently they do not show any reaction. This is so bothering for other people.

The tech: 

What a shame

Taxonomy upgrade extras: 

help each other to solve our problems

Hi dear mechanicinas

we are here to help each other solve our problems.agree?

so why don' read others blogs?

I have written several blogs till now.but just afew people read them and just no one answer!

the  last one was"why I can't define composite layup in abaqus explicite"the error is parameter composite can not be used in abaqus explicit!

thanks

BEST REGARDS

Lin.Zhang's picture

what the strain gauge rosette measures is in status of plane strain or plane stress?

I read some textbooks about mechanics of material. regarding strain measurement with strain gauge rosette, most of them regard it as  in the plain strain status.  But in my opinion, what the strain gauge rosette located is a fress surface. In this way, the thress stress components related to this plane, that is zz, zx, zy, should be zero, assuming that  the out normal of this plane is in the direction of Z axis.  then there are sigmaxx, sigma xy, sigmayy to be measured.  Is there anything wrong with my understanding? 

Are we going away from mechanics?


Hi all,
            Let me clarify first. The topic is not about imechanica.org is going away from mechanics or not.

 

A little humor for your day...Cats using Abaqus

Hi everyone,

There is a video on YouTube now of a cat using Abaqus...more specifically, the Abaqus Knee Simulator (Abaqus 6.12 release). Hope it makes you laugh:

http://www.youtube.com/watch?v=ECC_6GCgiIg&feature=plcp 

Have a great week!


Matt 

ZJ Li's picture

Does fluid structure interaction classified as a sub-field within fluid mechanics?

   

     hi, I am a student in Engineering Mechanics.  I would like to find a lab or a  professor related to fluid structure interaction(FSI) for grad study in USA.  does FSI is part of fluid mechanics discipline? or which is the right department I should search for?

     I have looked through some grad schools, I found some similary key words, such as aeroelasticity,  micro aero vehicles, swimmers, environemantl fluid mechanics, not that close anyway.

Ernest Appiah's picture

In recentyears, millions of solar panels have been placed on roofs around the world. Discuss how safe are they? Discuss the hid


Installing
solar panels on rooftops are obviously a high risk activity. There are a number
of hazards such as working at heights which could lead to falls from heights or
falling objects. Also slippery roof surfaces, damaged roofs, electrical
discharge from uninstalled panels, electrical fitting and equipments are all
potential hazards. All these, when not properly controlled could lead to
undesired conquences.

An interesting note about the TIMES universities ranking

TIMES has a ranking for top 400 universities (+). This ranking has five factors to rank universities which are:
(1) Teaching: the learning environment-30% of overall score.
(2) International outlook: staff and students-7.5% of overall score.
(3) Industry income: innovation-2.5% of overall score.
(4) Research: volume, income and reputation-30% of overall score.

about the gradient of dislocation core

According to the eigenstrain theory of micromechanics, described in the book by Toshio Mura (micromechanics of defects in solid, 1982) from page 15-20.

He provided the formulas for the eigenstrain at the core of screw and edge dislocation, but I can not understand completely.  

Anybody can provide some reference articles about the gradient value du(i)/dx(j) at the core of screw and edge dislocations respectively?  

 

 

 

 

Damage Model for Steel in Abaqus

Choose a channel featured in the header of iMechanica: 

Hi,

I want to try abaqus progressive damage model to simulate steel failure in Abaqus. I read the manual, and found that progressive damage model would be sufficient for my purpose. As I am quite new to damage modeling, I do not know how to determine parameters for shear failure or ductile failure or jjohnson cook model. Also, I would like to use damage evolution as well. Could anyone suggest me some typical parameters for steel (both damage initiation and damage evolution).

Thanks.

Regarding Journals and the Review Process

I thought it might be useful to the iMechanica community to write something about the review process in scientific journals.  For full disclosure, I am one of the co-editors of the Elsevier journal Finite Elements in Analysis and Design.  Indeed, it is precisely that editorship which informs the content of this blog post.  

fracture mechanics

 i want some one to clarify fundamental definition ,inter relationship or difference between the following terminologies .

small strain

large strain

small scale yielding

large scale yielding 

Pages

Subscribe to RSS - opinion

Recent comments

More comments

Syndicate

Subscribe to Syndicate