ProgramMaster Logo
Conference Tools for NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
Login
Register as a New User
Help
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
Symposium S-14: Composites Forming
Presentation Title Effect of Matrix Viscoelasticity on Prediction of Residual Stresses in Orthogonal 3D Woven Composites
Author(s) Higor Galdino da Silva, Borys Drach, Kostiantyn Vasylevskyi, Igor Tsukrov, Todd Gross
On-Site Speaker (Planned) Borys Drach
Abstract Scope Most high performance polymer matrix woven composites are manufactured with resins that require curing at elevated temperatures. Once curing is completed, the composites are cooled down to the room temperature. Due to the significant difference in coefficients of thermal expansion between the resin and the reinforcement, intrinsic residual stresses develop in carbon fiber reinforced composites during cooling. These residual stresses have been observed to depend on the reinforcement configuration, even leading to microcracking in highly constrained three-dimensional (3D) woven composites. At this time, there are no standard experimental techniques for measuring distribution of residual stresses in 3D woven composites or comprehensive studies on the effects of such stresses on their long-term performance. Therefore, high fidelity numerical simulations of composite manufacturing processes validated by experimental observations are necessary. In this paper, residual stress predictions based on different constitutive time- and temperature-dependent resin properties are compared. In particular, elastic, variable time pseudo-viscoelastic and linear viscoelastic approaches are examined. Finite element analysis is performed using the unit cell model of the “1x1 orthogonal” 3D woven composite previously developed based on direct x-ray computed microtomography observations. In addition to the analysis of residual stress distributions, hole drilling experiment is numerically simulated and the resulting surface displacements are compared with experimental measurements performed via electronic speckle pattern interferometry.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Effect of Matrix Viscoelasticity on Prediction of Residual Stresses in Orthogonal 3D Woven Composites
Friction Characterization in Hybrid Thermoforming of Aluminum and GFRP
Numerical Evaluation of Reinforcement Morphology Contribution to Process-induced Residual Stresses in 3D Woven Composites
Numerical studies of the composite materials with irregular inclusions
Study of the Flow-induced Orientation and Dispersion of Microcrystalline Cellulose Filled Polymer Composites: A Molecular Dynamics Simulation Approach

Questions about ProgramMaster? Contact programming@programmaster.org