Recent content by Qluq

Thanks Greg, no worries! i found where i can find the data i need and had already put it in the edit of the opening post. that's probably why nobody has reacted.

Hi everyone, I need some specific mechanical properties of A516 carbon steel, but as yet I am unable to find it online. Can you help me find the fatigue limit and the relation between yield strength and temperature? Are there tabulated values for this? Thanks! Mark edit: found it! seems i...

Maybe simply putting an RFID chip in the baby seat and a sensor in the car that can trigger an alert every time you leave the car? May something like a voice message, not like a loud tone. It shouldn't be something too annoying so people don't turn it off, more like a reminder. This leaves no...

In case of a laminar flow the flow would be steady when dv/dt=0. But how do you know it is laminar? In the real world v denotes a sort of average flow velocity, ignoring any turbulence. I think you should also check the Reynolds number. That will tell you something about the presence of...

Alright, after some correcting of my equations and debugging of the excel file, everything lines up! Wires A and D may be cut, and all results nicely add up to the applied weight. These results give me an upper bound of the resulting sling forces in the 4 wire statically undetermined problem...

Hi .Scott, i just worked out your suggestion, but all four solutions feature one or more negative tensions... my guess is that this is due to the fact that the cabinet IS actually rotating about its c.g. due to wire elongations.

Tonight i'll have time to work on the problem again, .Scott. I will work out your approach for sure! One of the things that is (was?) confusing me is that I was under the impression that the cabinet could rotate around the c.g. because of the elongations of the wires...

So i have a couple of different approaches to use now. Scott, when having 4 unknowns, 3 force equations and 2 moment equations (around x- and y-axes, the third would be identically zero, because no spin can occur), why would you use the extra requirement of no compressive force in a wire? why...

Hi .Scott, thanks for helping out! That is an interseting approach. -If I understand correctly you set up the three equilibrium equations of force, which i also started with. They look exactly the same as my own work. But why don't you use the 3 equations of moment too? -Then you would have 6...

anyone any ideas? would be much appreciated.

Ok, so what I did is to state the 6 compatibility equations in terms of the tensions and corner displacements. Again, these 6 equations have 3 cartesian components each. So there are 18 component compatibility eqs of which only 6 are needed. As i need 6 component equations to complete a 12x12...

Ah ok, i am used to think of the equilibrium equations in terms of their x-, y- and z-components so i always think there are 6 of them. So, viewed in that light would you agree that there are 4 tensions in 12 unknown components and 6 component equations of equilibrium? That would mean i need 6...

Thanks for your reply SteamKing. Indeed i expected to need compatibility equations, but i do not understand why there are only 2 equilibrium equations. which 2 are those? i thought i could actually just state all 6... do 4 of them become identically zero?

Hi everyone! This is my first post here, i hope to not make a fool of myself... Homework Statement I was asked to find the tension forces in the 4 wires by which a cabinet is suspended from the ceiling. The cabinet's centre of gravity does not coincide with its centroid, but is located...