วีดีโอ

@30:42, I'm a bit confused at that chart. You state that at theta=90 degrees, a Ex/E2=0.1. But I would read that chart as showing that the values on the left axis apply to the ratios Ex/Ex, -nxy,x, and Gxy/G12. The values on the right axis only apply to vxy. It would seem very odd to have a graph that you switch the reference axis somewhere along the length of the curve. I would think you need to use the same axis for all three comparisons, theta=0,45, and 90. Thus, I would think Ex/E2 should equal one, not 0.1, when theta equals 90 degrees. Are we sure we're reading this chart correctly? I believe this may simply be a misreading of the graph. As a further confirmation, I took at a look at the reference where the plot originates, the Jones text. Take a look at problem set 2.6, specifically problem 2.6.7. The problem asks you to derive an equation for E1/Ex, but if you put in 90 degrees for the equation, you get that E1/Ex=E1/E2. Or simply, Ex=E2. And this does make intuitive sense. If you rotate a lamina 90 degrees, should apparent stiffness in the x direction not simply be equal to its stiffness in the 2 direction?

Another very thorough lecture. Really worth taking the time to go through. Thank you for uploading these. TH-cam is like trying to find gold in a landfill. You really have to dig to find high-quality expert content like this. But sometimes after wandering the warrens of TH-cam, you can find real gems like this, a literal rocket scientist providing free full-length lectures on composite laminate analysis. Thanks again for all your work.

Very Helpful! Planning to start drafting ahead of my professor so this is a big help! Thanks

At 34:04 In delta p equation it should be (x-x')/Iy right for that problem..

Great lecture, very well put together! Really thorough introduction to the material.

Thank you for sharing your knowledge 🙏🏼

this lectures are like Gem, Thankyou for your service..

Looks great! The link in description doesn't seem to work though, gives me a 404 not found. Also, are you offering a digital version?

Amazon warning: This item cannot be shipped to your selected delivery location. Please choose a different delivery location. Can you open to Turkiye for shipping. Other book (aerospace volume II) shipping to Turkiye but It doesnt. Please help!

Is it possible to explain bikkurim which means firstfruits according to my research. This video was amazing and eye opening.

Thank you.

Hi Todd, this is the great video to understand this bolt group analysis very quickly. The figure you are showing at 30:32 at the right bottom, vector for Y component for the left two bolts should be upward i think. Please correct me if am wrong. And one more doubt I have is, why do we use moment induced shear component as minus sign for Xstress and Plus sign for Ystress in the below two equation?

I've applied those simple bending moment models to pins and bolts many times in the past and they simply dont work when working to close stress limits. They give grossly over pessamistic results in relation to what actually happens in real cases, eg predicting failure when a connection with eccentricity has performed safely for many years.

Hi professor. When locating the local max/min by setting dv/dx = 0. Why did you remove the coefficient "-4" in front of the x^2?

Hi Todd, What are the fundamental differences between bronze, silver & gold memberships? & will the playlists that you've already uploaded on youtube still be accessible to eveyone?

Minute 9.15 gives the equation for composite plate buckling: great explanation. Thanks!

Hi, when it will available in India& China?

Hi Todd, could you please let me know where i could find the problems/homework problems for all these topics?

Excited to learn from your classes😊

Dr Coburn, average shear stress (tear out) is used. I’m assuming this is appropriate at ultimate loads assuming load distribution? Are there times when a max shear 3/2 P/A would be used or just assume we are covered by average and/or the other accompanying checks?

Amazing! God bless!❤

Key points -When you feel trapped in a repetitive cycle, think creatively and consider unconventional solutions. -The more life tools you learn, the less likely you will get stuck. -Women are smarter than men.😂

听不懂

The woman is there just for the algorithm😅 🤫

Can't wait to put my hands on this one. Coburn's books are straight on topics.

Can't wait to put my hands on this one. Coburn's books are straight on topics.

I often get carried away working on an idea, sometimes the same one. I forget to save my work. Having wasted 🤬... lost too many hours. Moral of story save constantly.😅

I remember overthinking on a feed and bleed question drawing shear flows on a structure with a weird centroid.

I remember doing something similar in school. I didn't know how to add or subtract one place at a time, so I counted all my fingers over and over again and was way behind all the other kids. It seemed like I was always still trying to grasp one math concept while the others were already on the next one and I felt like I could never catch up.

Hi Todd, could you notify once it’s available for international shipping on platforms? It seems it’s only available for US

Well another buy

I have no idea what this is or why it was recommended but it sounded cool so i like 🎉

Hi Professor Coburn, the actual stress near the hole would be much higher than just P / (b-D)*t right? Because there's a hole, stress concentration is introduced. Therefore it could fail locally, (I would imagine a crack) I'm unsure if it will lead to complete failure. So when would it be acceptable to simplify such as the one in the video (net tension stress) versus evaluate with the stress concentration factor included in the Aerospace Industry?

any experience with or resources you are aware of re: somewhat novel DYI hybrid sandwich structures made from readily available/inexpensive materials? e.g. bamboo rods as stringers, box store insulation foam for core, acoustic panel felt as core, hardwood ply (~5mm) as outer skins, cheap craft straws cut and bonded vertically for dyi honeycomb core etc? sandwich panels are such a fascinating science and so many opportunities for experimentation!

Romantic, intimate all true but he humanised God throughout the book, having worldly or suchlike conversations with men and that to me is not attractive at all nor edifying.

Great, hope you will make a video for the bearing - bypass method

Ok but then we are introduced to Transverse Shear which is perpendicular to the cut just like Normal but still called Shear. So what’s the deal

One building opens this up for viewing and now everyone makes videos lol

Awesome breakdown and explanation. Need to learn more Hebrew and what scriptures mean,

Looks like you explain in a very simple and understandable language. Thanks

great lecture!

You've accidentally taken Ra as Wa/(a+b) instead of Rb, while solving considering summation of forces along vertical.

-GPA -Portfolio (design build fly) -Software (catia, solidworks, fluent) -coding (python, C+, VBA, Matlab)

What is the name of the street?

So go into bigger debt?

Nice ❤

Just wondering about the classification of sections with Gerard's method. Is the Z, J and C section only talking about extruded sections or does it apply for formed sections as well?

This guy is a loser. Don't listen to him and his foreigner wife

Good advise, you should have mentioned the personal connections you make as well if you're working at the big ones and the exposure you get from working on cool projects. In 10 years time my resume allows me to go work on virtually any project i want and i have close friends in management positions and almost every desirable company out there. I'd also suggest that new guys look into the tooling side of things to get thier foot in the door, lots of good opportunities there and it allows you to get a lot more experience that can be used for your personal projects than designing widgets for flight craft would be....

Also in Hindi ( Indian one of the most used language) it's ādmi