 Displacement field 
 Displacement field in the xdirection 
 Displacement field in the ydirection 
 Displacement field in the zdirection 
 Difference between displacement fields in the xdirection 
,  Congruent skew angles in the xy plane 
,  Congruent skew angles in the yz plane 
,  Congruent skew angles in the xz plane 
 Normal strain in the idirection 
 Engineering shear strain in the ij plane 
 External force applied in a solid 
 Surface area 
 Stress tensor 
 Strain tensor 
 Normal stress in the idirection 
 Shear stress in the ij plane 
 Traction in the xdirection 
 Traction in the ydirection 
 Traction in the zdirection 
 Linear mapping between stress and strain 


 Young’s modulus 
 Poisson ratio 
 Shear stress 
 Shear modulus 
 Temperature variation 
 Total strain energy per unit of area 
 Hydrostatic strain energy per unit of area 
 Distortion strain energy per unit of area 
 Subspace with infinity dimension of continuous with piecewise continuous derivatives 
 An element in V space 
 FEM basis function 
 Discrete subspace of V 
 A sample function in the subspace 
 A second sample function in the subspace 
 Lagrangian polynomial in the BDF method 
 Normal stress in r direction of a cylindrical coordinate system 
 Normal stress in direction of a cylindrical coordinate system 
 Thermal stress due to temperature variation 
 Bézier polygon 
 Strain rate in the low temperature dislocation glide model 

 Preexponential factor 
 Activation energy of an obstacle 
 Shear stress in the low temperature dislocation glide model 
 Temperature 
 Initial temperature 
 Boltzmann constant 
 Shear stress required to trigger dislocations movement 
 Thermal strain 
 Elastic strain 
 Plastic strain 
 Stress in the film 
 Biaxial modulus 
 Schmid factor 
 Dirac delta 
 Time 
 Strain rate tensor 
 Components of the strain rate tensor 
 System free energy per unit of area in Hoffman’s model 
 Free surface energy per unit of area ot island’s top in Hoffman’s model 
 Free surface energy per unit of area of the island’s lateral surface 

 Energy per unit of area spent in the formation of a grain boundary 
 Critical distance between two islands in Hoffman’s model 
 Free energy per unit of area after coalescence in Hoffman’s model 
 Strain energy release rate 
 Stress intensity factor 
 Island radius 
 Height of island coalescence 
 Maximum displacement of the island surface due to coalescence 
 Total energy in Seel’s model 
 Deposition rate 




