Гипотетическое значение деформации ползучести полистирольного пенопласта при постоянном сжимающем напряжении на основании начального экспериментального периода деформирования
Abstract
Hypothetic value of creep deformation of polystyrene plastic foam under the constant compressing stress on the basis of initial experimental period of deforming Results of the study of foam polystyrene slabs(EN 13163) creep under the ultimate level of compressing stress CS(10) – (60–250) kPa at static specific load σс=(0,25 and 0,35)σ10% are presented. On the basis of an experiment, tn=7 days, and mathematical-statistical analysis of data of lasting experiments (122, 535 and 1826 days) it is possible to assess the hypothetic value of creep deformation for advance of 10 years using experimental values εс(tn=7 days) (or Ic(tn=7 days) according to the regression equation) or the empiric equation for coefficient mt taking into account the creep deformation developing in time.