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  1. Three-dimensional thermoelastic properties of general composite laminates

    06 Dec 2018 | Contributor(s): Orzuri Rique, Johnathan Goodsell, Wenbin Yu, Byron Pipes

    This paper presents a hybrid rule of mixtures for calculating the complete set of effective three-dimensional thermoelastic properties of composite laminate when it is approximated as an equivalent, homogeneous, anisotropic solid. The laminate can be made of generally anisotropic layers with...

  2. Introduction Remarks on EDAM Workshop

    06 Dec 2018 | Contributor(s): Byron Pipes

  3. Material Characterization for Composites Additive Manufacturing

    26 Sep 2018 | Contributor(s): Nathan Sharp, Eduardo Barocio, Bastian Brenken

    Slides presented by Dr. Nathan Sharp, Validation Engineer at the Composites Manufacturing and Simulation Center, on the characterization of materials and machines for additive manufacturing and extrusion deposition additive manufacturing, specifically. This presentation was part of the 2018...

  4. Examples of EDAM Part Manufacture of Compression Molds in PPS-CF

    26 Sep 2018 | Contributor(s): Eduardo Barocio

    Slides presented by Eduardo Barocio, PhD Candidate in the Composites Manufacturing and Simulation Center, on the application of extrusion deposition additive manufacturing using PPS-CF material for simulation and production of printed compression molds.  This presentation was part of...

  5. Annealing of Printed Composite Parts

    26 Sep 2018 | Contributor(s): Bastian Brenken

    Slides presented by Dr. Bastian Brenken,Technology Director for CFK Valley, on viscoelastic effects in AM parts and the effect on annealing processes. This presentation was part of the 2018 Extrusion Deposition Additive Manufacturing workshop at the Indiana Manufacturing Institute.

  6. Adhesion in Extrusion Deposition Additive Manufacturing

    26 Sep 2018 | Contributor(s): Eduardo Barocio

    Slides presented by Eduardo Barocio, PhD Candidate in the Composites Manufacturing and Simulation Center, on the characterization and prediction of adhesion in additively manufactured components. This presentation was part of the 2018 Extrusion Deposition Additive Manufacturing workshop at...

  7. Additive3D - The Integrated Workflow App for Additive Manufacturing

    26 Sep 2018 | Teaching Materials | Contributor(s): Michael Bogdanor, Tony Favaloro, Eduardo Barocio, Bastian Brenken

    Slides presented by Dr. Michael Bogdanor, Director of the Composites Virtual Factory, on the integrated workflow app, Additive3D. This presentation was part of the 2018 Extrusion Deposition Additive Manufacturing workshop at the Indiana Manufacturing Institute.

  8. Mori-Tanaka Stiffness Homogenization for Short Fibers

    01 Jun 2018 | Tools | Contributor(s): Nicholas Smith

    Calculate the homogenized stiffness for an RVE of short fibers in a matrix material where the orientation state is described using Advani's orientation tensor.

  9. VUMAT of a Generalized Standard Continuum Damage Model

    13 Apr 2018 | Downloads | Contributor(s): Zhenyuan Gao, Liang Zhang, Wenbin Yu

    Based on a recently developed generalized standard continuum damage model (CDM), this VUMAT user subroutine provides a rigorous and robust framework for implementing various damage behavior into 2D or 3D solid elements in a finite element analysis (FEA). It is designed to be used with...

  10. Failure Aanalysis in Platelet Molded Composite Systems

    09 Feb 2018 | Publications | Contributor(s): Sergey Kravchenko

    Long-fiber discontinuous composite systems in the form of chopped prepreg tapes provide an advanced, structural grade, molding compound allowing for fabrication of complex three-dimensional components. Understanding of process-structure-property relationship is essential for application of...

  11. Constitutive Modeling of the Rheological Behavior of Platelet Suspensions

    09 Feb 2018 | Publications | Contributor(s): Drew Sommer

    Compression molding of chopped fiber composites is used to manufacture com-plex 3D geometries with high fiber volume fractions of 50-60% and long, discontinuous fibers and thermoplastic matrices. When prepreg, chopped into platelets, is used as a charge material, the individual platelets...

  12. CT SCAN ANALYSIS FOR THE CHARACTERIZATION OF FIBER ORIENTATION IN LONG DISCONTINUOUS FIBER COMPOSITE MATERIALS

    09 Feb 2018 | Publications | Contributor(s): Benjamin Denos

    Fiber-based composites have material properties which are highly dependent on the fiber orientation and distribution of their constituent fiber and matrix. While traditional continuous fiber laminates contain highly aligned and predictable fiber orientation, discontinuous fiber composites have...

  13. Coupled Simulation of Squeeze Flow of Fiber Suspensions

    09 Feb 2018 | Publications | Contributor(s): Drew Sommer, Anthony Favaloro, Byron Pipes

    Anisotropic viscous constitutive relationships for the coupling of flow and fiber orientation analysis were implemented into a commercially available finite element code as a user subroutine. The implemented model was used for the coupled flow simulation of the squeezing flow of high aspect...

  14. Anisotropic Viscous Flow Simulation for Fiber Orientation Analysis

    09 Feb 2018 | Publications | Contributor(s): Anthony Favaloro, Drew Sommer, Byron Pipes

    The anisotropic viscosity introduced by the presence of fibers in a molten polymer matrix is often neglected in flow analyses for determining resulting fiber orientation in molding processes. While this simplification may be appropriate in short fiber systems at low fiber volume fractions, long...

  15. Progressive Failure Analysis in Platelet Based Composites Using CT-Measured Local Microstructure

    09 Feb 2018 | Publications | Contributor(s): Benjamin Denos, Sergey Kravchenko, Byron Pipes

    Comparison of microstructurally accurate digital twin tensile specimen failure simulations with their real-world counterpart tensile specimen experimental results is performed. Five tensile specimens are cut from a 250x250 mm plate that is compression molded from a thermoplastic, prepreg,...

  16. Prepreg Platelet Morphology and Scale Effects on Molding Processability

    09 Feb 2018 | Publications | Contributor(s): Drew Sommer, Anthony Favaloro, Byron Pipes

    Unidirectional, prepreg platelet-based molding systems have gained considerable attention for manufacturing parts with moderate performance and processability metrics. A numerical study of squeeze flow, using a recently developed technique for coupled flow simulation and fiber orientation...

  17. Progressive failure analysis of a stack of aligned prepreg platelets

    09 Feb 2018 | Publications | Contributor(s): Sergey Kravchenko, Drew Sommer, Byron Pipes

    A computational, three-dimensional model for simulation of progressive failure in a stack of aligned prepeg platelets was developed. The model was based on a representative volume element (RVE). Two possible failure mechanisms were considered for the platelet stack: (i) the failure of platelets...

  18. Local Mean Fiber Orientation via Computer Assisted Tomography Analysis for Long Discontinuous Fiber Composites

    09 Feb 2018 | Publications | Contributor(s): Benjamin Denos, Byron Pipes

    Platelet-based long discontinuous fiber (LDF) composites have a unique microstructure with fiber collimation within platelets, discontinuity at platelet boundaries, and a large degree of heterogeneity at the macro-scale. This extreme macro-heterogeneity requires microstructural characterization...

  19. Test

    16 Jan 2018 | Downloads | Contributor(s): Taylor Graham

    test

  20. Purdue 3.2 Slides Dec 17

    12 Dec 2017 | White Papers/Research Documents | Contributor(s): Johnathan Goodsell