Material toughness,static vs impact

[srchandran]

let me explain i do a static tensile test and get the stress strain graph. the area under the
graph is the toughness that means i can use this static toughness data to predict
the failure under impact loads


other idea is that i have done a impact toughess test.

if i can get the toughness value from a static stress strain graph why should i
again do a impact toughness test

 

[Studiot]

let me explain

Is this coursework and have you been told to do both tests and explain why?

What impact tests are you considering ( Charpy?, Izod?, other?) and what is the difference between the specimens for tthe tensile and impact test?

 

[srchandran]

this is not coursework. i drop an object from a height. that means it is a high strain rate
problem. can i use a static stress strain diagram and calculate the area under the curve

can i compare the strain energy of the impact and compare it with the area under
the static stress strain diagram