Structures and materials Sac help!!!

[Laith]

Hey Guys for our structures and materials sac we are to make our own pracs with which we can
demonstrate our knowledge and then we have to do a formal practical report in class.


DOES ANY ONE HAVE ANY SPECIFIC IDEAS ON WHAT I SHOULD DO?
possible examples include
testing strength of fishing wire
testing compressive / tensile forces for something
etc ...
If anyone has completely completed a successful sac similar to this please share on how you did this
Thanx

[Asx4Life]

I revised by myself using checkpoints, have you finish checkpoints?

[cranberry]

SAC S&M resit sprung on us!! first was stuffed...i guess..

attached are the results that we have to use on monday for our sac (they r completely fked!!)

what graphs r right (we take in tables and graphs we have made, into the sac)?
download results (attached) and see what graphs u can get

also would help Laithi for background theory, such as derived formulas...how can stress, strain, youngs mod be derived?

so take a look at these results....ive attempted some graphs (as seen on the excel sheets).

what are the vital relations to make (the only hinted one is force - extension), obviously stress - strain, but r there any others (~5 different relations, remembering length and gauge are separated variables) that have proper significance toward analysis?

TY VN!!

[cranberry]

what graph is a force - gauge (increasing gauge) supposed to give? linear?

[taiga]

Here's mine from year 12 attached because I'm a fly like a G6.

You may only use this for reference. Believe me there are teachers lurking here, and that aside if someone else from your school tries to do that as well, you'll both get 0.

[cranberry]

thanks....i cant use yours because, as ive said above, we have our own fked up results which we have to use....have u taken a look at them? i dont think our teacher has even tried to graph the summary data!...if we are going to find hookes law, youngs modulus etc (which we probably are) we need feasible data!?

thanks anyway taiga for helping out

[cranberry]

lolmfao!!!.....take a look at our force - extension graph (attached)....u reminded me that the gradient of a Force - extension graph is the stiffness....how is there even a gradient for that? its mental lol

[taiga]

dont worry about the data man, just calculate it all out, and find out what constant you find, and then say that obviously something was fucked up about the experiment. That's a nice segue into going into the errors which may have occurred in the experiment

[cranberry]

sac went well...turned out we only used the data for anomaly purposes

ty

[VivaTequila]

What you can do is omitt some points which lie outside the general line. Admittely I haven't looked at the results, but surely they aren't all bogus, you might have just taken a few wrong measurements but kept the majority feasible.

It's not unfair to call some point's 'outliers' on your graph, and ignore them when trying to sketch a force/extension graph.

Also Taiga just looked at your sheet, and found this abomination

Weight – The weight that is applied to the wood, measured in Kilograms (kg) NEWTONS. Mass is kilograms!