Simulation of bias tension of woven fabric using PAM-FORM
11 Aug 2017 | Animations | Contributor(s): Tian Tang
Calculation of stress relaxation stiffness of linear viscoelastic composites using ABAQUS
09 Aug 2017 | White Papers/Research Documents | Contributor(s): Tian Tang
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...
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...
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...
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...
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...
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...
Finite element unit cell model based on ABAQUS for fiber reinforced composites
26 Jul 2017 | Downloads | Contributor(s): Tian Tang
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.
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...
Micromechanical investigations of polymer matrix composites with shape memory alloy reinforcement
18 Jul 2017 | Publications | Contributor(s): Tian Tang
Numerical characterization of effective fully coupled thermo-electro-magneto-viscoelastic-plastic response of smart composites
18 Jul 2017 | Publications | Contributor(s): Tian Tang
Forming simulation using PAM-FORM, AniForm, LS-DYNA, and ABAQUS
18 Jul 2017 | Animations | Contributor(s): Tian Tang
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...
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...
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...
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....
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...
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...