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Force graphs and stressstrain graphs 
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#1
Nov810, 06:26 AM

P: 614

I know what a forceextension graph looks like.
DOes a forcecompression graph look the same just with different axis? (compression on the x axis NOT extension) DOes a compressivestrain graph (Young Modulus) look the same as a tensile stressstrain graph? if not what do they look like thanks 


#3
Nov810, 06:38 AM

P: 614

Am I correct? 


#4
Nov810, 07:26 AM

PF Gold
P: 2,022

Force graphs and stressstrain graphs
Can you think of any sample of any material which when compressed acts in a similar way to when stretched?



#5
Nov810, 07:32 AM

P: 614




#6
Nov810, 07:56 AM

PF Gold
P: 2,022

I am now imagining a spring where the loops are not touching.When compressed the spring may display a Hooke's law type of behaviour but only until the loops actually make contact in which case any further compressive force tends to laterally distort the spring and or compress the material from which the spring is made from.Any resulting compression will be extremely (possibly immeasurably) small.Depending on the exact structure of the spring the Hooke's law type extension can be much greater than the compression and exceeding the elastic limit can result in the spring displaying increasing extensions similar to those displayed by ductile materials going into plastic regions.In short,with this example and others I can think of I can see some similarities between stretching and compressing but only for a narrow region surrounding the unstretched/uncompressed length.



#7
Nov810, 08:05 AM

P: 614

For compression stressstrain graphs it would be the same then? or not?



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