Question

.

Answer 1

24000 3.6

Answer 2

how is stiffness defined?

Answer 3

:)

Answer 4

2400 3.6

Answer 5

wouldn't it be the slope then?

Answer 6

if you wanted the average, you could approximate the area under the curve and divide by the total extension to yield

Answer 7

do you need a stiffness function?

Answer 8

86400 i guess or 2403.6

Answer 9

one of those

Answer 10

the yield point is where the graph takes a dive

Answer 11

well what kind of function typically models this? i'm not familiar with what is ususally desired. you have points so you could approximate area using simpson's rule or some other method and use that to find stiffness in different regions.

Answer 12

or just use the data points to find slope in different regions

Answer 13

yes

Answer 14

do you have the actual data?

Answer 15

use the data... you could find the slope between two points. if it's in excel, you could even set it up to compute automatically (or at least by dragging).

Answer 16

okay you just mentioned other physical quantities... stiffeness is only force/extension or does the cross sectional area and original length factor in somehow?

Answer 17

so then that's all you could use, right?

Answer 18

and hopefully, that's all that is needed

Answer 19

how can the extension be negative?

Answer 20

yes, but you could get a running slope...

starting witt the 2nd point, you could compute the slope for the 2nd point and the first using in a formula, then drag that cell down and it will do the same for all of the subsequent cells, giving you all of the slopes between adjacent points

Answer 21

send the excel file

Answer 22

csv?