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Finite element prediction of curing micro-residual stress distribution in polymeric composites considering hybrid interphase region

The interphase is a region between fibers and a matrix, which has different properties from the matrix and the fibers, but is dependent on them. Considering the interphase region has a significant effect on the accuracy of obtained residual stresses. | Finite element prediction of curing micro-residual stress distribution in polymeric composites considering hybrid interphase region Engineering Solid Mechanics 2018 11-20 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm Finite element prediction of curing micro-residual stress distribution in polymeric composites considering hybrid interphase region V. Teimouri and M. Safarabadi School of Mechanical Engineering College of Engineering University of Tehran Tehran 11365-4563 Iran A R T I C L EI N F O ABSTRACT Article history The interphase is a region between fibers and a matrix which has different properties from the Received 26 August 2017 matrix and the fibers but is dependent on them. Considering the interphase region has a Accepted 20 November 2017 significant effect on the accuracy of obtained residual stresses. So far in order to obtain the Available online micromechanical residual stresses the interphase properties are considered as an average. In 20 November 2017 Keywords this paper the properties of the interphase are assumed variable by using a suitable UMAT Finite element simulation code in the ABAQUS software. The equations of previous studies that have acquired UMAT code interphase properties to be variable are used to write the UMAT code. A representative volume Interphase element RVE in polymer composites is modeled in three phases in the ABAQUS software Variable properties and the interphase properties are considered as FGM by using the UMAT code. Temperature Residual micromechanical stress variation during curing to environment temperature is the only loading factor in the RVE. The matrix fiber and interphase stresses are obtained in the ABAQUS software. The achieved stresses were compared with the results of previous studies that considered interphase properties as average. Finite element and energy methods were used in previous papers but in the present study just the finite element method