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question on rotation tensors

Submitted by mchinna on
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Hi,

I am doing a self-study on continuum mechanics and have the following question on rotation tensors that I would like to get answered with your help:

 

How would one come up with the rotation tensor in 3D when the axis and the angle of rotation is given. For e.g., what would be the rotation tensor in cartesian coordinates when I would like to rotate the system about n(e_1 + e_2 + e_3) by say +60 deg.

 

Thanks in advance

Manoj

Pin joint modeling using Continuum Plane Stress

Submitted by Mehdi Naderi on
education
Composite modeling

Dear All,

I will appreciate if you answer my question.

I modeled a 2D pin joint in ABAQUS using USDFLD to apply failure criteria.

 

I used CPS4 element for (0/90)s. As you know, the elements of both two layers completely overlap.

Abaqus gives a cotour of all layers together (bothe 0 and 90 deg.). How I can only, for example, see the contour of 90 deg. ply or only 0 deg. ply? 

In the output plots, how can i see stress or any field variable output for each layer? 

 

Regards,

Mehdi 

Mechanical Vibrations textbook

Submitted by nithesh on
education
Mechanical Vibrations

Please recommend a good undergraduate textbook for 'mechanical vibrations'...

Thanks in advance.

14th april 2011 <UPDATE>

what a hypocritical website this is.... almost 200 reads and not one comment. high academic qualifications of most members seems to be creating an elastic sheath of EGO!

Thanks for reading this too. :)

Sapphire crystal mechanical properties

Submitted by dror on
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Hello everyone!

I have few questions about the sapphire crystal-

1. does anyone know what is the yield strain of this material?

2. is this material can be recycled? and if yes, in which method would it be?

thanks, and it will be great if you have any site that has this information 

 

How to import multiple input files in Abaqus/CAE

Submitted by May on
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I am learning Abaqus example problems, such as  " Coupled acoustic-structural analysis of a pick-up truck", I want to import the input files to Abaqus/CAE to learn how to build the model and do the analysis, but when I import the input files throug the main menu file->import->model, there is nothing in the model tree; moreover, there are so many input files for one example, how can I import all these files into one model?

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