کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
819408 | 906557 | 2010 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A mechanistic model for transverse damage initiation, evolution, and stiffness reduction in laminated composites A mechanistic model for transverse damage initiation, evolution, and stiffness reduction in laminated composites](/preview/png/819408.png)
A constitutive model to predict stiffness reduction due to transverse matrix cracking is derived for laminae with arbitrary orientation, subject to in-plane stress, embedded in laminates with symmetric but otherwise arbitrary laminate stacking sequence. The moduli of the damaged laminate are a function of the crack densities in the damaging laminae, which are analyzed one by one. The evolution of crack density in each lamina is derived in terms of the calculated strain energy release rate and predicted as function of the applied load using a fracture mechanics approach. Unlike plasticity-inspired formulations, the proposed model does not postulate damage evolution functions and thus there is no need for additional experimental data to adjust material parameters. All that it is needed are the elastic moduli and critical energy release rates for the laminae. The reduction of lamina stiffness is an integral part of the model, allowing for stress redistribution among laminae. Comparisons with experimental data and some results from the literature are presented.
Journal: Composites Part B: Engineering - Volume 41, Issue 2, March 2010, Pages 124–132