Sintering of powder composite (1995) . The green body takes new shape during sintering process. The colour level zones of a pore density can be seen in the picture. Moving Lagrangian grid, implicit finite element scheme and penalty functions technique (for contact interactions) are used. Equations for sintering process are described in report on grant from Swedish Royal Academy of Sci. in 1995 and in paper on constitutive equations in 2000. Code ASTRA.