Quick sense check on deflection calculation

AI Thread Summary
The discussion focuses on a deflection calculation for box section legs of a frame, specifically whether to use two multiples of the second moment of area due to having two vertical legs. The user initially seeks confirmation on their approach, referencing images of their calculations. They mention a seismic load scaling factor, "Seis.x," which is not relevant to the deflection calculation. Ultimately, the user resolves their confusion after a good night's sleep, indicating that the problem was simpler than anticipated. The thread concludes with the user expressing satisfaction with their understanding.
Mech King
Messages
69
Reaction score
0
Hi guys,

I just wanted a quick sense check. I have uploaded two images; one showing basic free body diagram, one showing some quick scoping calculations.

My question is, to do a simple deflection calc on the box section legs of the frame, do I just use two multiples of my second moment of area in the deflection calculation, as I have done on the second image? Since there are two ventricle legs? Ignore the value "Seis.x" in the calculation, this is just a seismic load scaling factor!

Simple problem I think, but my brain is fried from MathCad all day :/

Cheers

ImageUploadedByPhysics Forums1374246289.440818.jpg


ImageUploadedByPhysics Forums1374246317.552456.jpg
 
Engineering news on Phys.org
Sorry, all sorted now. Good nights sleep was all that was needed :)
 
Sorry, all sorted now. Good nights sleep was all that was needed :)
 
How did you find PF?: Via Google search Hi, I have a vessel I 3D printed to investigate single bubble rise. The vessel has a 4 mm gap separated by acrylic panels. This is essentially my viewing chamber where I can record the bubble motion. The vessel is open to atmosphere. The bubble generation mechanism is composed of a syringe pump and glass capillary tube (Internal Diameter of 0.45 mm). I connect a 1/4” air line hose from the syringe to the capillary The bubble is formed at the tip...
Thread 'Physics of Stretch: What pressure does a band apply on a cylinder?'
Scenario 1 (figure 1) A continuous loop of elastic material is stretched around two metal bars. The top bar is attached to a load cell that reads force. The lower bar can be moved downwards to stretch the elastic material. The lower bar is moved downwards until the two bars are 1190mm apart, stretching the elastic material. The bars are 5mm thick, so the total internal loop length is 1200mm (1190mm + 5mm + 5mm). At this level of stretch, the load cell reads 45N tensile force. Key numbers...
I'd like to create a thread with links to 3-D Printer resources, including printers and software package suggestions. My motivations are selfish, as I have a 3-D printed project that I'm working on, and I'd like to buy a simple printer and use low cost software to make the first prototype. There are some previous threads about 3-D printing like this: https://www.physicsforums.com/threads/are-3d-printers-easy-to-use-yet.917489/ but none that address the overall topic (unless I've missed...
Back
Top