opinion

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: 

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

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? 

Hi all,

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

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 

     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.

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.

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.

(5) Citations: research influence-30% of overall score.

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?