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  1. Simulation of bias tension of woven fabric using PAM-FORM

    11 Aug 2017 | Animations | Contributor(s): Tian Tang

  2. Calculation of stress relaxation stiffness of linear viscoelastic composites using ABAQUS

    09 Aug 2017 | White Papers/Research Documents | Contributor(s): Tian Tang

  3. A Benchmark Study of Finite Element Codes for Forming Simulation of Thermoplastic UD-Tapes

    07 Aug 2017 | Publications | Contributor(s): Dominik Dörr, W. Brymerski, S. Ropers, D. Leutz, T. Joppich, L. Kärger, F. Henning

    For Finite Element (FE) simulation of composite thermoforming processes, either commercially available codes or multi-purpose FE solvers canbe applied. In this work, the commercially available codes AniForm and PAM-FORM, as well as two approaches implemented in the multipurposeFE solvers LS-Dyna...

  4. A viscoelastic approach for modeling bending behavior in finite element forming simulation of continuously fiber reinforced composites

    07 Aug 2017 | Publications | Contributor(s): Dominik Dörr, Fabian J. Schirmaier, Frank Henning, Luise Kärger

    An approach for modeling rate-dependent bending behavior in FE forming simulation for either a unidirectionalor a woven/bidirectional reinforcement is presented. The applicability of the bending model toboth fiber architectures is guaranteed by introducing either an orthogonal or a...

  5. Composite Stiffness Property Prediction

    07 Aug 2017 | Downloads | Contributor(s): Joshua Morris

    Micromechanical models for the composite axial tensile, transverse tensile, and axial shear are combined into one tool with the objective of comparing their effectiveness as property prediction methods.  Rule of mixtures models (ROM) and the composite cylinder model (CCM) results for...

  6. Woven fabrics UMAT- a coupled material model

    02 Aug 2017 | Downloads | Contributor(s): Masoud Haghi Kashani, Masoud Hejazi, Abbas Hosseini, Farrokh Sassani, Frank Ko, Abbas S. Milani

    One of the advantages of woven fabrics over unidirectional prepregs is their superior formability thanks to the large shear deformation capability. There exists, however, a limit on the shear deformation of woven fabrics, namely the wrinkling. Applying tension to delay wrinkling during forming...

  7. A Code for Flexural Analysis of Thin-Walled Composite I-Beams with Sandwich Web and Bond-lines

    02 Aug 2017 | Downloads | Contributor(s): Mo E. Asl

    Composite I-beams have extensive applications in the aerospace industry, construction and light-weight engineering structures. In the utility-scale wind turbine blades, the spar-caps and the shear web compose an I-beam structure which is referred to as the backbone of the blade carrying the...

  8. Puck Failure Criteria

    31 Jul 2017 | Downloads | Contributor(s): karan kodagali

    Composite materials have been established as competitive materials during the last few decades due to their high strength to l ow weight ratio among other advantages and are widely used in many industries. A recent study has found that the industrial usage of composite failure...

  9. Finite element unit cell model based on ABAQUS for fiber reinforced composites

    26 Jul 2017 | Downloads | Contributor(s): Tian Tang

  10. Composites themoforming simulation using PAM-FORM-An example

    24 Jul 2017 | Downloads | Contributor(s): Tian Tang

    An example showing the simulation of thermoforming composite ply using PAM-FORM. The videos of the evolutions of shear angle and temperature distribution of the composite ply during forming process are demonstrated.

  11. Variational asymptotic micromechanics modeling of heterogeneous piezoelectric materials

    24 Jul 2017 | Publications | Contributor(s): Tian Tang, Wenbin Yu

    In this paper, a new micromechanics model is developed to predict the effective propertiesand local fields of heterogeneous piezoelectric materials using the variational asymptoticmethod for unit cell homogenization (VAMUCH), a recently developed micromechanicsmodeling technique. Starting from...

  12. Micromechanical investigations of polymer matrix composites with shape memory alloy reinforcement

    18 Jul 2017 | Publications | Contributor(s): Tian Tang

  13. Numerical characterization of effective fully coupled thermo-electro-magneto-viscoelastic-plastic response of smart composites

    18 Jul 2017 | Publications | Contributor(s): Tian Tang

  14. Forming simulation using PAM-FORM, AniForm, LS-DYNA, and ABAQUS

    18 Jul 2017 | Animations | Contributor(s): Tian Tang

  15. Computational evaluation of effective stress relaxation behavior of polymer composites

    11 Jul 2017 | Publications | Contributor(s): Tian Tang, Sergio D. Felicelli

    This paper presents a micromechanics model to characterize the effective stress relaxationstiffness of polymer composites. The linear viscoelastic behavior of polymer material wasmodeled by hereditary integral. The proposed model was established based on thevariational asymptotic method for unit...

  16. Abaqus plugins for Nonlinear Acoustics

    06 Jul 2017 | Downloads | Contributor(s): A.K. Singh, V.B.C. Tan, T.E. Tay, H.P. Lee

    This paper introduces generalized tools in the form of plugins for a commonly used commercial finite element package Abaqus/Standard to model the nonlinear acoustic methods for detection of delamination damage in composite laminates. The nonlinear acoustic methods typically involve exciting a...

  17. Randomization algorithm for the micromechanical modeling of fiber-reinforced Polymer Matrix Composites

    02 Jul 2017 | Downloads | Contributor(s): Eric Jason Carey, Marianna Maiaru

    Polymer Matrix Composites (PMCs) are replacing metallic materials in many engineering fields such as aerospace, naval and mechanical engineering. Failure in PMCs can happen due to matrix cracking, fiber failure, fiber/matrix debonding and delamination. Performing damage and failure analysis...

  18. A Multiscale Modeling Technique

    01 Jul 2017 | Downloads | Contributor(s): Haotian Sun

    In this paper, a multiscale modeling framework is proposed to simulate the macroscopic response of a fiber-reinforced polymer matrix composite through a subscale full finite element model. This approach shows a distinct advantage since the microstructure of the composite is modeled explicitly....

  19. Python and fortran script to create Abaqus input file for discretized addition of material in additive manufacturing (3D printing)

    01 Jul 2017 | Downloads | Contributor(s): VINAY DAMODARAN

    In additive manufacturing, especially, fused deposition modeling, material is continuously added over a print substrate. To simulate the process in finite element analysis, a discretized approach is used where finite number of blocks are added to the domain to simulate material addition. In the...

  20. Experimental Data Processing

    01 Jul 2017 | Downloads | Contributor(s): LOUKHAM SHYAMSUNDER, Subramaniam Rajan

    Finite element models are being actively developed to model composite systems. One such is the MAT213 material model implemented into LS-DYNA [1,2]. MAT213 is an orthotropic material model with three distinct components - elastic-inelastic deformation, damage and failure. The model is driven by...