Ko te poraka damping he rawaka rigidity i roto i te ahunga poutū ki te whakarite deformation iti i raro i te kawenga poutū nui.Ko te poraka damping he elasticity i roto i te ahunga whakapae, e taea te urutau ki te displacement whakapae o te kurupae i puta mai i te kaha braking, pāmahana, shrinkage raima, ngokingoki me te kawenga, me te urutau hoki ki te hurihanga o te piriti.