I have carried out a compressive test in a ceramic-metal composite and I am not sure if there is there is a contribution of the plates in the stress-strain graphic obtained. Is there any equation to correct the possible effect of the plates, taking into account their stiffness?
Thank you!
The question is not only with the stiffness of plates, you should know the stiffness of the whole deformation machine. The simliest way to estimate the stiffness of the machine is to make stress-strain test with the massive hard sample (hardened steel of similar) or even directly anvil to anvil. You should write the result of this calibration test in coordinates "shift of anvil" - "load". Afterwords, in experiment with the your sample, to each value of load correspond the value "shift of anvil", which is sum of shift of sample and shift of machine, so you can easyly remove the contribution of machine to stress-strain curve.
I suggest a dummy made of hadmetal with the same geometry as the one to be tested. Then, this graph is subtracted from that of the material under investigation
There is an article from Pan, Feng and Hudson (2009) that may help you "Study of failure and scale effect in rocks under uniaxial compression using 3D cellular automata"
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Nanomaterials