To determine the part warpage attributable to each of these variates, three individual analyses are run where in each case the contribution of just one contributor is taken into account by eliminating the effect of the other two. Visual inspection of the magnitude of the part deflections in each single variate case indicates the dominant cause of warpage. This functionality is available for Midplane, Dual Domain and 3D analysis technologies.
For the top and bottom of each element, and for the perpendicular and parallel directions, the differential cooling component of the shrinkage is determined by subtracting the differential shrinkage and orientation effects contributions from the total shrinkage determined from the shrinkage calculations as part of the Fill+Pack analysis.
The shrinkage contribution due to orientation effects is eliminated by assigning to each element the same shrinkage value in both the parallel and perpendicular material orientation directions. This value is the linear shrinkage value , given by:
The shrinkage contribution due to differential shrinkage is eliminated by subtracting the linear shrinkage value , from the parallel and perpendicular shrinkage results determined in the shrinkage calculations as part of the Fill+Pack analysis.