Open AccessNonlinearity of the stress-strain dependence of quasi-isotropic CFRP laminate under re-static loading
Author(s) -
P. B. Severov
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1023/1/012027
Subject(s) - isotropy , materials science , nonlinear system , composite material , stress (linguistics) , deformation (meteorology) , degradation (telecommunications) , stress–strain curve , point (geometry) , structural engineering , strain (injury) , geometry , mathematics , computer science , physics , engineering , optics , telecommunications , linguistics , philosophy , quantum mechanics , medicine
As part of the task of studying the degradation of material properties under re-static loading of a quasi-isotropic CFRP laminate the nonlinearity of the stress-strain dependence in the areas of active deformation is proved. The optimal curve approximating the experimental data from the point of view of the problem is chosen. The change in the derivatives of this curve can be use σ to assess the degradation of the material properties during re-loading.