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    Am I doing something crazy? I just passed the PE exam, going to quit my job for full time grad school to study Computer Science

    There's lots of ways of getting exposure to programming while still leveraging your mechanical engineering background. One way I've found that works for me is working on mechatronic type stuff - i.e. buying a small/cheap microcontroller (arduino works great for this, but there are others such as...
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    Anyone here planning to take PE machine design in April 2018

    Unfortunately, I don't know of any good freely available guides as I have never had a need for one. In my first job out of college my manager tasked me with setting up a training for myself and the rest of the engineering team, so I worked with a company to do a 1-day training for all of us. It...
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    Anyone here planning to take PE machine design in April 2018

    It looks like you could pick up all eight points in Mechanical Components: is there a reason you haven't decided to focus there for your future studying? I found that Shigley was an invaluable resource for these types of problems, especially when I was studying. While I had a passing...
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    OCTOBER 2017 PE EXAM

    Passed machine design! WOOHOO!!
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    OCTOBER 2017 PE EXAM

    I took the MDM exam last friday. Not sure if anyone else on here took that exam, but my thoughts are that I felt pretty well prepared, though there were a few questions that caught me off guard. More specifically (while not being too specific) there were two questions on the morning exam (is the...
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    MERM appendix

    I am also interested. [email protected]
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    6 Minute Solutions, MSM Problem 39

    This problem essentially breaks down to a beam bending problem. The cantilever beam is 2 inches long with a force applied at 1.5'' from the supported end. The problem states that the beam must not deflect more than a given amount at the point where the force is applied. The following equation...
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    6-minute Solutions, Problem 48

    There is not a figure provided. The entire problem statement is as follows:
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    Spring Critical Frequency: Shigley vs. MERM

    Thank you for providing your treatise. I am still confused as to equation 54.18 in MERM though. How is this equation derived? I asked mostly because I don't like taking equations like this at face value - I'd rather understand where they come from, as in my experience this makes it easier to...
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    Spring Critical Frequency: Shigley vs. MERM

    Shigley's chapter 10, on page 527, describes the fundamental frequency and weight of a spring as follows: In the MERM, in table 60.1, the same equation is given for the linear frequency of a mass-and-spring system except there is a factor of pi in the denominator of the 1/2. This equation is...
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    What is effective eccentricity?

    Yes that helps! This is a simple statics problem it makes perfect sense now, thank you.
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    What is effective eccentricity?

    I'm working on problem 3 in chapter 53 of the MERM companion. In the solution on page 53-5, an equation in given for "effective eccentricity". I have checked in the MERM, in Shigley, and done some googling. I can't figure out where this equation came from. It appears to be a way of determining...
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    NCEES Practice Exam Question 112

    Ah hah, I had not accounted for the strain in the bar due to the force of the spring - an oversight on my part. Thank you for clearing this up for me.
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    Composite Structure: Area Transformation Method

    How did you deduce that the ratio of stresses is equal to the ratio of areas? i.e. "sigma-st over sigma-c equals A-c over A-st"
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    NCEES Practice Exam Question 112

    I've tried sketching this out as you suggested. I still don't understand the why the spring deflection is subtracted from the thermal expansion.
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    Composite Structure: Area Transformation Method

    I've been able to use the "Area Transformation Method" as shown in MERM page 51-20 to solve various composite structure problems. However, I don't really understand the origins of the method - I can get started by assuming that the strain in the two materials, but I don't understand the part...
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    NCEES Practice Exam Question 112

    I have the 2016 NCEES practice exam for Machine Design and Materials. Problem 112 shows a horizontal shaft that is cantilevered on the left. On the right, there is a spring between the shaft and a wall. The problem is to determine the "increase in force" due to a change in temperature. The...
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    6-minute Solutions, Problem 48

    The problem statement says "a 750 lbf load is applied" - it does not specify that this is the lateral force on the journal. I guess I am just meant to assume this? And yes, P=Power that was a typo on my part.
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    6-minute Solutions, Problem 48

    Ah, I guess I should specify: I have the "Mechanical Systems and Materials Problems" version.
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