Відео

I see that you have a more detailed comment which shows up in my email, but not here. So, I will give a reply to it now. Correct, this is an old video and my mind is much more geared toward thinking about areas of operations research than kinematics. This video was made when I was teaching a course strictly on kinematics, so we never considered any forces or moments. This was done in a different course. With this in mind, I would agree that an engineer should consider such generated forces when developing a design. I also agree with your statement about applications. Design requirements differ greatly when working with a low-speed cam that is used in a child's toy versus a critical machine in a factory operating at a much higher angular velocity.

@@frankieskaggs409 I must admit, I deleted my detailed comment because I feared it would seem overly critical, and I understood that the main object of demonstration here was the practical application and the transition from theory to usable geometry. Thank you for your comprehensive answer.

@@iCanHazTwentyLetters No problem at all. I welcome the conversation and appreciate the detail.

It has been awhile since I have been thinking about statics, but I will give it a try. Determinate trusses are ones that can be solved only considering equilibrium equations. For 2D problems, this includes summing forces in the "x" and "y" directions and summing moments perpendicular to the plane. If I draw a free body diagram enclosing the entire truss, then I should be able to compute the reactions using these 3 equations. I would be expecting to get a 3x3 system of linear equations. So, I would say that for 2D you would end up with up to 3 reactions.

I don't know where you can get the drawings for the different pieces. For this video, I actually used calipers to measure a physical piece to create the drawing.

Link 12, the bucket component, is connected to two links. Joint M connects to link 7 and join N connects to link 11. Point of interest is then on the other side of the bucket where the tips of the teeth would be located.

Not exactly. BE and CE have lengths of approximately 60.406 in.

@@frankieskaggs409 thanks.

The coordinates of the vertices are listed below. in the 3D sketch in SOLIDWORKS, I only have active dimensions of 36 and 60 inches. (0,0,0) (31.17691454,0,18) (31.17691454,0,-18) (20.78460969,29.39387691,0) (80.78460969,29.39387691,0)

Collision detection would allow you to test the limits of travel while collision detection is active. Limit mates would always be enforced.

The diagram is showing a graphical approach to solving this 2D vector problem. These types of problems can be solved in an analytical fashion focusing on the i and j components of the vectors. They can also be solved using a graphical approach and using arrows to represent the individual vectors.

I typically have had administrative rights on the computers that I have used. If this an issue, then you may be able to change the location of your weldments directory to where you have "full control" or read/write access.

Where you draw them technically shouldn't matter if you consider the link to still be one length seperate from the slider.

If you consider the sliding pair for hydrolics than consider cylinder and piston as two seperatw links. The answer will be same.

Hey Alex. Good to hear from you! I hope all is well. Looks like you've got a project going with an old Dodge pickup.

In the Mechanics of Materials texts which I have access, that value is specific to the given cross section. Essentially it is attempting to come up with a property of the cross section which plays the same role as the polar moment of inertia for circular cross sections. I don't have access to the text referenced in the video, but the text that I have access to now points to an additional text for a deeper study. This text is "Theory of Elasticity" by S.P. Timoshenko and J.N. Goodier.

@@frankieskaggs409 thank you!

I created such a profile, and uploaded it here for people who want to follow along but don't quite know how to use the same pipe size. Here are the steps: 1) Download the file here: filebin.ca/6b2uRfMrunb8/1.25sch40.sldlfp 2) Put that file into the weldment profiles directory. On my Windows 10 machine with SW 2018, it goes here: C:\Program Files\SOLIDWORKS Corp\SOLIDWORKS\lang\english\weldment profiles\ansi inch\pipe Using this profile I was able to get the exact same results as Frankie showed in this video.

@@bluehornet6752 Thanks for the info.

I'm using Microsoft OneNote for the "notepad" type of feel when presenting.