What's New: Past Year

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  1. VUMAT of a generalized standard continuum damage model

    13 Apr 2018 | 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...

  2. PreVABS

    16 Nov 2017 | Contributor(s):: Su Tian, Xin Liu, Wenbin Yu

    PreVABS is a pre-processing tool for VABS and SwiftComp. This tool is designed to reduce the workload of preparing input files of beam cross sections for VABS and SwiftComp, and to make the process automatic for the design and optimization purpose. Cross sections with general and...

  3. Mechanics of Materials and Structures (MoMS) Program at NSF

    31 Oct 2017

    Presentation by Dr. Kara Peters and Dr. Siddiq Qidwai during Tuesday Lunch at ASC 32nd Technical Conference. 

  4. Composites Manufacturing Informed Performance Through Simulation

    30 Oct 2017 | Contributor(s):: Byron Pipes

    Presentation by Prof. Byron Pipes during Monday Lunch at ASC 32nd Technical Conference. 

  5. On Non-Local and Non-Classical Continuum Mechanics Theories and Applications

    23 Oct 2017

    Prof. JN Reddy's plenary lecture at 32nd ASC Technical Conference. 

  6. Composite Stiffness Property Prediction

    07 Aug 2017 | 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...

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

    02 Aug 2017 | 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. Woven fabrics UMAT- a coupled material model

    02 Aug 2017 | 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...

  9. Puck Failure Criteria

    31 Jul 2017 | 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...

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

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

  11. 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.

  12. 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...

  13. 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...

  14. 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...

  15. 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...

  16. 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....

  17. 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...

  18. 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...

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

    29 Jun 2017 | 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...

  20. MUL2-UC Beam modeling of periodically heterogeneous composites

    13 Jun 2017 | 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...