what a helpful video, was never taught in my university course but this helped as I had to rationalise choice of material for the product I created for my product design dissertation. What a legend!
This is a fantastic video! I can't believe how badly this is taught at my University. Materials Science feels like such a subjective course from my viewpoint. It is the most confusing of the engineering courses for me. Thanks again!
Fantastic and relatively short video on material selection, I really needed this for my upcoming Introduction to Materials Science course! Thanks Dr. Wu!
Thank you, Dr. Wu! You explained everything I didn't understand about my professor's lecture. This is super helpful in completing my assignment. You're a lifesaver.
Thanks a lot, helped me understood in detail about material selection.🙏 But, I have a question/doubt, with the Ashby plot with different guide lines like with stiffness indexes E/ρ, E(²/³)/ρ, E^(1/2)/ρ.
do you select material before the geometric and force analysis ? i have always found it easier to calculate the maximum stress the part is subjected to and after that I would select material with factor of safety in mind?
Hi Great Video. One thing I can't figure out are the first 3 Performance Index values of 70.3 for Wood when cost factored in. Same for 2 materials below wood. For the rest of the materials when you divide Performance Index values by Normalised cost they work out but not for the first 3...?
Hi professor, I couldn't find a video about ceramic materials in the channel .I'm trying to find an answer for the question,which is _Why do ceramic materials need to be sintered?_ Could you help me ?
Good question and I've also been meaning to make a ceramics video. Generally you might sinter a ceramic for a number of reasons to improve its properties. Generally, ceramic particles are shaped together with binders but have lots of pores and poor mechanical properties in their unsintered state. The sintering process therefore increases the density of the ceramic, removing porosity and thus improving its mechanical properties as the individual grains bond together.
Great suggestion. I have a few other videos I want to make first but will hopefully come back and make some more Ashby plot and material selection videos
If you have a look at the equation of mass, we've separated out the terms into geometric/load parameters and material properties. In a material selection problem we only influence the material properties so we separate this out for our performance index. In this case, we flip the density/sqrt(Young's Modulus) relationship so that we are maximizing the performance index to reduce mass. This gives us P=E^0.5/rho
Great presentation Dr Billy Wu. Thank you for your help. It helped me out immensely. Your 10 minutes = half of my a semester.
Glad it was helpful!
what a helpful video, was never taught in my university course but this helped as I had to rationalise choice of material for the product I created for my product design dissertation. What a legend!
Thanks. Glad to hear it was useful
This is a fantastic video! I can't believe how badly this is taught at my University. Materials Science feels like such a subjective course from my viewpoint. It is the most confusing of the engineering courses for me. Thanks again!
Glad it was helpful!
Fantastic and relatively short video on material selection, I really needed this for my upcoming Introduction to Materials Science course! Thanks Dr. Wu!
Thanks!
Thank you, Dr. Wu! You explained everything I didn't understand about my professor's lecture. This is super helpful in completing my assignment. You're a lifesaver.
Glad to hear it was helpful :)
really good video!! I studied this from my professor's lectures for so long and couldn't figure it out but this makes it so much easier to understand!
Glad it was helpful!
you saving my exam, thank you very much !!
Good luck with the exam
This boutta save the EDMS course!
Glad to hear it was helpful
I have no words, best video explainig this topic. Thank you very much. Nice work
Thanks. Glad to hear it was useful
Thank you Dr.Wu, this video helps a lot of the report!
Glad it was helpful!
Great video! Thank you
Thanks. Glad you found it useful
Thanks a lot! this video really cleared my concepts about the topic and in a very simple way.👍
Glad it was useful
Great video my friend👍👍
Thanks
It is really helpful, thank you so much!
Glad to hear it was helpful
Thanks!❤ great vid
Glad to hear you found it useful
Thank you this helped a lot
Glad it helped
Thank you, Sir.
Please make more videos about engineering design. This is very helpful. Subcribed.
Thanks :)
Thanks a lot, helped me understood in detail about material selection.🙏
But, I have a question/doubt, with the Ashby plot with different guide lines like with stiffness indexes E/ρ, E(²/³)/ρ, E^(1/2)/ρ.
do you select material before the geometric and force analysis ? i have always found it easier to calculate the maximum stress the part is subjected to and after that I would select material with factor of safety in mind?
Hi Great Video. One thing I can't figure out are the first 3 Performance Index values of 70.3 for Wood when cost factored in. Same for 2 materials below wood. For the rest of the materials when you divide Performance Index values by Normalised cost they work out but not for the first 3...?
Hi professor, I couldn't find a video about ceramic materials in the channel .I'm trying to find an answer for the question,which is _Why do ceramic materials need to be sintered?_ Could you help me ?
Good question and I've also been meaning to make a ceramics video. Generally you might sinter a ceramic for a number of reasons to improve its properties. Generally, ceramic particles are shaped together with binders but have lots of pores and poor mechanical properties in their unsintered state. The sintering process therefore increases the density of the ceramic, removing porosity and thus improving its mechanical properties as the individual grains bond together.
@@BillyWuOh that's cool .Plus I need the steps of the sintering for ceramic materials ,professor.
From where I can find it
@@yigitcan824 One of the best text books is "Materials Science and Engineering: An Introduction" by Callister.
@@BillyWu
Oh that's cool, professor. Thank you very much 😊
What would be performance index for a hacksaw blade?
In case of 3D printing, can we select materials for airfoil using ashby plots?
Is there any free software to plot ashby plot?
Can you do a selection of materials for a flywheel?
Great suggestion. I have a few other videos I want to make first but will hopefully come back and make some more Ashby plot and material selection videos
@@BillyWu Thank you!
we literally have the same cw at my uni lol
didn't know how you calculated material indices values
If you have a look at the equation of mass, we've separated out the terms into geometric/load parameters and material properties. In a material selection problem we only influence the material properties so we separate this out for our performance index. In this case, we flip the density/sqrt(Young's Modulus) relationship so that we are maximizing the performance index to reduce mass. This gives us P=E^0.5/rho
anyone from INDIA.