Elastic Axial Deformation | Finding Forces & Deflections in Multi-Segment Rods w/ FBDs & Force Plots

[@chaseteal8722]

Very nice lecture!

[@TheBomPE]

Thank you! I'm glad you liked it! You might also be interested in the playlist where I have all of the lectures for this course collected. ENGR 220: Statics and Mechanics of Materials: kzbin.info/aero/PL1IHA35xY5H5sjfjibqn_XFFxk3-pFiaX Thanks for watching!

[@Kong9901]

Thank for your courses :) I don't understand in the example at 17:30 why we don't consider the force F_B for calculating delta_AB. Indeed, the CB part applies a force F_B on the BA part and so we should consider that the tensile load applied on the BA part is F_A - F_B. Am i wrong ? To me, we should have delta_AB = (F_A-F_B) * L1/(E1 A1)

[@Kong9901]

I think I get it : the CB part does apply a force F_B on the BA part but not in the cross section in BA since the point A is free. Is this right ?

[@pandulenihaindongo7551]

You got any friction videos sir?

[@TheBomPE]

I don't really cover friction in a very focused way in this course. The elementary concepts of friction are covered in our Physics class that is a prereq for this class. I do work problems now and then involving friction though. You might check out these for example: kzbin.info/www/bejne/fnnchYydrMt-rZI kzbin.info/www/bejne/rJ6caZmeoJeCp6c kzbin.info/www/bejne/bHOToneuYrWheZI kzbin.info/www/bejne/hWm9npaaq72YnpY kzbin.info/www/bejne/m3bFdIN_dpmJb9U

[@burakayan3360]

i didnt understand where does 90 kn come from. if we are adding the forces . we should get 10 kn in the diagram

[@TheBomPE]

listen carefully at 33:45 the way the figure is labeled, two forces of 80kN each are applied at C

[@RegFu]

Hi Sir, just wonder if the DC section should experience 10KN because otherwise the rod is accelerating. Thank you.

[@TheBomPE]

listen carefully at 33:45 the way the figure is labeled, two forces of 80kN each are applied at C

[@RegFu]

@@TheBomPE got it. Thank you!