Paul Gregg - BSME 1980 UofUtah
Boeing Associate Technical Fellow
Research and Development of:
New Materials and Processes
carbon fiber composites, titanium, chopped fiber composites, metal matrix composites
Joining Processes:
adhesive bonding, diffusion bonding, welding
Structural...
In the picture you can see what I'm talking about. This is a simple problem to do if you can use moments, but alas my education system seems to have something against those.
##AB## is the uniform rod/ladder, G is its centre of mass, BE is the horizontal x axis, AD is the wall, BD is the smooth...
Hello all,
In a recent discussion, I came across this question of influence of free length (or unthreaded length) in bolts in retaining the clamping force between the elements to be joined. Out of the two proposals in the attached pic., which one will keep the two plates clamped for a longer...
Hi Everyone,
My name is Neeraj Kirola. I am a final-year student of Engineering. I need suggestions regarding mechanical engineering projects; I found many Websites on the Internet like this, but I need many more projects.
Can anyone Suggest more? 🙏
Thanks In Advance.
The discharge coefficient is the ratio of the actual discharge to the ideal discharge and can be measured experimentally. If one were to experimentally measure the discharge coefficient using water, would this value be constant for all incompressible fluids?
What does the discharge coefficient...
I'd like to do some experiments with flames at different Equivalence Ratios - but I'm confused as to how I can find the Equivalence Ratio for different conditions. Wiki-article
So the stoichiometric balance for Methane + Air is
CH4 + 2(O2 + 3.76N2) -> CO2 + 2H2O + 7.52N2
Referencing equations...
Hello
I am looking for a manufacturer or mechanic that can build my custom compound bow. It doesn't have to be a big business. I would appreciate any help.
Thank you
I need help understanding what happens to the gas that is being worked by the piston, in the crank slider. My goal is to produce linear motion on an object up to a certain height and I'm wondering since the slider moves back during the rotation of the crank what happens to the object I'm trying...
I am designing a soccer ball launcher (like the one in the attached picture) for school and am having trouble figuring out how much torque I need the motors to have.
I am trying to follow an energy analysis approach to get these calculations done. Attached is a file of my calculations so far...
Hi, I need a little help with this problem with compound planetary gears. I don't know how to apply the formulas for this specific type of placement.
I need to know the final speed of the engine knowing the number of teeth z1 = -104 ring gear which is internal, z2,3,4 = 22 for small planets...
Dear All,
I'm a french professional photographer working on Still Life and Architecture.
As a long time and personnal project I'm working on a 3D printed/Laser cut analog camera that will shoot 6x4.5 frames.
In the end it will be some kind of rangefinder with integrated electronic light...
Hello forum, i want to make a samulation of a body. The body will be moved horisontal on y,x axis. I want on my simulation the body to change direction many times(for example i want to go for 10sec right and then left end right...). My question is does i need more than one differential equation...
Hi folks,
I am returning to school this coming fall to pursue a M.S. degree in Mechanical Engineering. This fall, I will have been out of school for about 3.5 years and let me tell you, I have forgotten a large portion of calculus and intermediate classical physics :D.
Rather than have this...
Homework Statement
I'm getting stuck with this one and in need of some direction! Obviously I'm not looking for a direct solution, but maybe a outline of what I should be doing? (I'll attach an image in a few minutes)
<Image here incoming!>
Known data:
d2 = d1 / 2
F = thrust force (N)
Pa = ρ...
Hello everybody!
Happy 2019! I'm trying to design a mechanical face seal for the part shown below, and I'm struggling with the number of o-rings I'm supposed to use. There are two cavities (rings) for two different fluids. The liquid dynamic pressure for both the internal and external fluids is...
(mentor note: not really a homework as the OP seeks understanding from an article)
1. Homework Statement
I saw this on https://www.electronicshub.org/open-loop-system/, I thought the dry clothes should be the output, and heating the cloth should be the plant/process, I am so confused...
I am 2nd year physics undergrad. Just want to study a bit about materials in my free time. I have no idea about engineering books. Please suggest some good books. Thanks.
We know efficiency (η) = Woutput/Winput
Now in any cycle, for instance, the Otto cycle, let the total work output be WO, total heat added be WH & the total work done on the gas to compress it be WC.
Then, will efficiency be equal to (η) = (WO-WC)/WH ?
Or will it be equal to (η) = WO/(WH+WC) ?
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