HigherEd 2.0

I have gotten a bit behind on posting these, so here are the first two lectures on torsion. Module 10 focuses on the basic mechanics of torsion and a derivation of the torsion formula. Module 11 then shifts gears and discusses the angle of twist. All of this is good information and […]

 

 Lecture 10: Torsion basics: Play Now | Play in Popup | Download

 

 Lecture 11: Angle of twist: Play Now | Play in Popup | Download

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Just getting caught up here…this is the final lecture from Chapter 4 and it covers some issues in normal stress and stress concentrations. The key here is to look at the correct chart, and read that chart the correct way. Not too difficult, but it does require some practice. There are some […]

 

 Lecture 9: Stress concentrations (axial loading): Play Now | Play in Popup | Download

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This is all about bending. If you need some review of shear and moment (Sec. 6.1 and 6.2), then you must review your statics notes so that you are completely comfortable with the procedures. There are also lots of online resources available to help. All of these problems are due on Friday […]

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These problems are due on Friday 2/27 at NOON. No late homework will be accepted. They are all from Chapter 5 on torsion, two on stress, two on twist, two on static indeterminacy.
Problems 5-3, 5-10, 5-50, 5-51, 5-77, 5-80
You will need to think just a bit about the problem with the gears. […]

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Exam 1 will take place on Wednesday Feb. 18 from 6-8 pm. We will be in MEC 341. The content of the exam is everything we’ve covered in the first 4 chapters of the book, except thermal stress. Pretty much everything else is fair game. I expect to have 4 problems, […]

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This homework is due on Friday 2/13 at NOON. No late homework will be accepted. Note also that properly-completed homework assignments have decent diagrams, a clear flow and thought process, answers with units attached, etc. Please work hard to exhibit all the good habits of problem solving. I guess if […]

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This is a good one about static indeterminacy. For these kinds of problems, here is the general strategy:

draw FBD and write the equilibrium equations, and identify all the unknowns
compare the number of unknowns to the number of equilibrium equations
if you have more unknowns than equilibrium equations, you need more equations!
write […]

 

 Module 8: Static indeterminacy (axial loading): Play Now | Play in Popup | Download

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This homework is due on Friday 2/6 at NOON. No late homework will be accepted. These problems are all from Chapter 3.
Prob. 3-5, 3-8, 3-24, 3-30
For 3-8, you might find Examples 3.2 and 3.3 useful for the “permanent” set part of the question. There is also a video solution on […]

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First, I dug up some videos off my hard drive which are solutions to some recent problems from class. Shortly, I’ll also post PDFs of the students solutions to these problems. But in the meantime, feel free to have a look.
Second, some of you may not have explored the publisher’s web site just […]

 

 Video solution: Prob. 4-9: Play Now | Play in Popup | Download

 

 Video solution: Prob. 4-36: Play Now | Play in Popup | Download

 

 Video: accessing the companion website: Play Now | Play in Popup | Download

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So here it is. Axial load (leading to strain and stress) in all its glory. I guess the key here is that the equation is really versatile, in the sense the we can use it alone, or in a summation, or in combination like what we saw in the problems from Wednesday […]

 

 Module 7: Axial Loading: Play Now | Play in Popup | Download

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