Isotropic and Orthotropic - Brain Waves

[@vihanprashant9702]

Beautiful! Explanations using real life examples makes your videos so easy to understand!

[@ambertheater]

came for the skateboard, stayed for the knowledge. thanks man.

[@kmotynojodas]

Thanks. There are not many videos about this topic.

[@crankfrank3274]

Excellent sir

[@mohammadmuzammil4848]

nice video and those are some impressive quotes sir !

[@mz-by4gh]

Nice explained

[@anilethtiusaba605]

Amazing video, thank you so much! I want to know about anisotropic too

[@mishishereable]

Hi there! Thanks for the video. All the videos! So, does orthotropic mean that a material has strands or fibers oriented at right angles to each other, like in plywood or a woven rug? Or that a material has different material properties in different directions, like in cheese sticks? I got confused there because I think you suggested both. Cheers :)

[@onyiboemmanuel6060]

This just answered my question Sir

[@1minCAD]

Brilliantly explained 🙏🏻

[@skanko93]

Hello, thank you for the video, I have a question; so basically isotropy refers only to material properties that can be represented with vectors? A material property like density (which is represented by a scalar) only makes sense if we talk about homogeneity right?

[@darrenkirana]

Nice explanation, thanks!

[@hyronov]

Hi Professor, I was told it would be harder to break wood across its length than along its length as you have to snap the fiber itself. I am not sure 4:01 you meant it the other way around, keep up the great work

[@eoinkenny3188]

hyronov If you were to take a little square of wood and put it into a tensile tester you would find that along the grain would be significantly stronger than across the grain. This makes sense if you consider the way that the wood is formed. Along the grain you have long continuous elements of wood that go from one end of the piece to the other without break. Across the grain you have multiple short elements that are essentially glued together which cannot provide the same strength as the continuous elements along the grain. Perhaps what you were told was that along the length of a plank (hence along the grain) you can generate a lot more leverage along the length than you can across the short width of the plank. Hence it is easier for a person to physically break. Hope this helps.

[@hyronov]

Hi Eoin, that would be true only in tensile loading right , would be different in compressive loading if the part was bending you would want the bending load to be 90 degrees to the grain length- web.stanford.edu/ ~rayan/wood/wood. the link kind of explains my point. thanks

[@eoinkenny3188]

hyronov I'm not familiar enough with wood properties to say with certainty but I believe that compression along the grain will still be stronger. Most materials have different yield/max stresses in compression vs tension. Note this is not the same as isotropic/orthotropic. If you compress something enough that it starts bending that is known as buckling. There is a good video on the topic on this channel. If you load up a beam so that it's bending that can be shown to result in tensile stress on the outside of the bend and compressive stress on the inside. When considering bending wood you are correct. You would want the force to be acting at 90 degrees to the grain.

[@hyronov]

Hi Eoin, that makes sense

[@yasarusta4410]

Very well explained Sir. Please start new Mechanical Engineering courses

[@tomasenrique]

This did help!!!

[@cherrylovedrop9523]

thank you soo much. you helped me alot

[@atos719]

Mr. French, could you please help me with one problem? I'm just getting confused when trying to evaluate the directions of the moment and torque. I'm trying to use the right hand rule but the directions on the sketch are opposite. I would really appreciate! It's an example problem 3-10 from Shigleys's Mechanical engineering design 10th edition.

[@atos719]

Actually, the right hand's rule works properly only for torque. In evaluation of moment's direction only "left" hand's rule fits.

[@eyesopen9477]

Is water isotropic?

[@santoshdehariya1601]

Thanku

[@ranbirsingh-li4po]

Thank You

[@anas357-c2y]

thanks

[@alzialfarid1963]

yes sir, the chinese word's meaning is welcome, its like this 欢迎

[@purdueMET]

Thanks :-)

[@user-yg4pi1tl7e]

I'm part of homogenius species

[@engineermahal2520]

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[@salsuginusrex5196]

Homogeneous is not homogenous.

[@emirhan4899]

thanks

[@emirhan4899]

amazing explanation