What's New: Past Year

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  1. Variational asymptotic micromechanics modeling of heterogeneous piezoelectric materials

    24 Jul 2017 | 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...

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

    24 Jul 2017 | 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.

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

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

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

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

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

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

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

    11 Jul 2017 | 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...

  7. Abaqus plugins for Nonlinear Acoustics

    06 Jul 2017 | 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...

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

    02 Jul 2017 | 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...

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

    01 Jul 2017 | 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...

  10. Experimental Data Processing

    01 Jul 2017 | 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...

  11. A Multiscale Modeling Technique

    01 Jul 2017 | 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....

  12. A User Material Subroutine for Implementing Anisotropic Hyperelastic Model of Fiber-Reinforced Rubbers

    01 Jul 2017 | Contributor(s):: Rui Li

    This code is a user subroutine written in FORTRAN that can be implemented in the commercial finite element software ABAQUS (version 6.14) to model the constitutive behavior of knitted fiber reinforced rubbers. Currently, this code can be used to simulate the anisotropic hyperelastic response of...

  13. Random Fiber/Matrix Model Generator

    01 Jul 2017 | Contributor(s):: Micheal Keith Ballard

    A tool for the creation of 2D fiber/matrix models that have a random arrangement of fibers.  It can create a random representative volume element of a fiber/matrix microstructure that has both a periodic mesh and geometry, allowing convenient application of periodic boundary conditions...

  14. Injection Overmolding Manufacturing Process Simulation

    29 Jun 2017 | Online Presentations | Contributor(s):: Johnathan Goodsell

    Injection over-molding or hybrid molding is a high-rate composites manufacturing process for fabrication of structural components with complex geometries.  The structural backbone is provided by a continuous-fiber woven prepreg while the geometric complexity is realized via injection...

  15. Generating Representative Volume Element (RVE) for Finite Element Analysis of Random Fiber Composites/Nanocomposites

    29 Jun 2017 | Downloads | Contributor(s):: Rajni Chahal, Ashfaq Adnan, Ajit Roy

          Typical electronics packages are assembled by integrating various parts on printed circuit boards (PCB). Traditional interconnect materials in electronics packages are not suitable for DoD electronics because in many DoD extremely transient conditions, mechanical failures of...

  16. Forming simulation using ABAQUS fabric material model

    29 Jun 2017 | Animations | Contributor(s):: Tian Tang

  17. MUL2-UC Beam modeling of periodically heterogeneous composites

    13 Jun 2017 | Downloads | Contributor(s):: Alberto Garcia de Miguel

    The micromechanics code MUL2-UC is developed to work as an efficient and high-fidelity tool for the computation of the effective stiffness matrix and the recovering of the local fields of periodically heterogeneous composite structures. The main novelty is that higher-order beam theories are...

  18. April 24, 2017 Task 3.2.1.4 Adhesives and Joining - VTA-MSU (Drzal)

    09 May 2017 | Online Presentations | Contributor(s):: Lawrence T Drzal

    Objective: This section will address issues associated with adhesive bonding and painting of composites based on Dow’s chopped UD random fiber molding compound.  Goal: Determine the effect on: CF-matrix adhesion with and without IMR; the surface of the cured CFRP with and without IMR;...