Hi, I'm researching a potential masters project involving incorporating piezoelectric crystals into a ceramic so that when a load is experienced the electric field generated encourages the electroplastic effect in the bulk phase so that it becomes more plastic and inhibits crack formation. The basic equation relating electric displacement and field is the starting point, I don't have a good grasp on electric displacement. It mentions dipole density which I guess forms a matrix that you adjust with a strain vector that coupled with some factors can produce a measurable charge displacement? yeah I'm really lost. If someone understands this maths, could you help me with figuring out what a grain of say quartz under a say 0.1% strain would produce as an electric field? currently im looking to produce a charge density of i think 40A/cm? which i foresee as difficult due to the potentially very high resistance of the ceramic. at this stage im looking at the ceramic used in ceramic knives, although im yet to find out what that is.