Engineering Drawing - Science topic

When it comes to translation of numbers into diagrams, or charts, I use the chart function in Google sheets:

Select the cells to include in the graph

To create a flowchart, you can:

You can also use the Google Sheets API to create and update charts within spreadsheets.

You can also check out this video:

When it comes to actual drawings, I use Figma.

It is meant to design mock websites and apps, but itis a really powerful design tool that give you a lot of options and it pretty intuitive.

Figma is an all-in-one brainstorming and design tool for teams. It can be used for UI and UX design, online whiteboards, team collaboration, agile workflows, strategic planning, and mind mapping.

And by the way, your example diagram looks pretty good. I would certainly use it in a publication

Hi Konrad,

The Kocks-Mecking parameter (kf) quantifies how strain rate influences strain hardening during plastic deformation. Sample geometry, such as diameter, potentially impact kf. Smaller diameters can lead to strain localization, different stress distributions, and variations in dislocation densities in comparison to larger diameters.

Initial mechanical properties of samples also influence the material's overall strain hardening behaviour and its sensitivity to changes in strain rate, which in turn affects the kf parameter. Higher initial yield strength can lead to greater potential for strain hardening and increased sensitivity to strain rate changes, potentially resulting in a higher kf value. The initial stiffness of a material can influence how it responds to stress. Materials with faster work hardening rates tend to exhibit higher strain hardening responses. Ductile materials deform more uniformly, while less ductile materials may experience localized deformation. The initial microstructure, including grain size and distribution, can also impact dislocation mobility, deformation mechanisms, and consequently kf.

If you look in Materials Science and Engineering Textbooks, such as "Materials Science and Engineering" by William D. Callister and David G. Rethwisch; These text books often cover topics related to plastic deformation, strain hardening, and strain rate sensitivity. Look for chapters on mechanical behaviour of materials.

Hope this helps,

Kind regards

R provides very nice graph but it involves some commands/programming to do it. You can use a template of what others have done. R can be downloaded for free.

Fabio, is " Convex Polygon Fitting in Robot-Based Neurorehabilitation" the work you referenced which has all the examples and the code?? I have sent you a request for the article. Could you please send it across? Thanks

No your image is correct.

If your error is not zero you will get a ‘Epsilone’ since you have the difference between a positive setpoint and a negative output.

Good understanding 

Depends on whether you mean the surface, or cross-sectional.  Certainly historically the mathematical basis for this has been the Radon Transform, which is the projection of the image intensity along a radial line oriented at a specific angle (http://www.mathworks.com/help/images/ref/radon.html)

That however is on the basis of a line integral through an object, which when rotated about multiple angles is used as the basis for Computed Tomography.  

Dear Professor,

Mechanical Engineering Drawing/Engineering Drawing is a challenging subject to teach and also to learn. In my class room i ask the students first to build models (using chart sheets) of various solids which gives them idea about the 3D modeling and also development of surfaces. I ask them to keep the models on the table while explaining the drawing problem. This makes my students feel happy and find the subject easy to learn.

Learning engineering drawing will improve logical thinking and imagination in students.

with regards,

P.Thirumal

you can download draftsight from http://www.3ds.com/products-services/draftsight/download-draftsight/.

You can transform the arcs in polylines and in the list of properties to get the corresponding lengths:

http://www.eng-tips.com/viewthread.cfm?qid=329749.

Knot values decide the range on which a particular basis function influences.

In case of 'Uniform B Spline', knot values are uniformly spaced, non-repeating (single multiplicity) e.g. 0, 1, 2, 3, 4, 5, 6, 7

In case of 'Non Uniform B Spline', spacing changes (but they are always in increasing order) and there can be repetitions. e.g. 0 0 0 1 2 2 2. If 'k' is the order then first and last 'k' values are same (to pin it down to first and last points respectively) and middle values can be adjusted.

I suggest this book:" BIM Content Development. Standards, strategies and best practices". R.S. Weygant.