Evan J. Pineda
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View article: Multiscale Modeling of Thermoplastic Matrix Composites for Cryogenic Hydrogen Storage Applications
Multiscale Modeling of Thermoplastic Matrix Composites for Cryogenic Hydrogen Storage Applications Open
The performance of thermoplastic matrix composites for linerless Type V cryotanks is evaluated via a partially coupled, multiscale computational workflow with the objective of assessing the choice of thermoplastic matrix material under rea…
View article: Influential Microstructural Descriptors for Predicting Mechanical Properties of Fiber-Reinforced Composites
Influential Microstructural Descriptors for Predicting Mechanical Properties of Fiber-Reinforced Composites Open
Fiber-reinforced composites contain microscale features such as variations in local fiber volume fraction, fiber clusters, and resin-rich regions, which may impact mechanical properties. Microscale models need to be large enough to capture…
View article: An Algorithm for Modeling Thermoplastic Spherulite Growth Using Crystallization Kinetics
An Algorithm for Modeling Thermoplastic Spherulite Growth Using Crystallization Kinetics Open
Crystallization kinetics were used to develop a spherulite growth model, which can determine local crystalline distributions through an optimization algorithm. Kinetics were used to simulate spherulite homogeneous nucleation, growth, and h…
View article: Two-Stage Surrogate Modeling for Data-Driven Design Optimization with Application to Composite Microstructure Generation
Two-Stage Surrogate Modeling for Data-Driven Design Optimization with Application to Composite Microstructure Generation Open
This paper introduces a novel two-stage machine learning-based surrogate modeling framework to address inverse problems in scientific and engineering fields. In the first stage of the proposed framework, a machine learning model termed the…
View article: Micromechanics-Based Modeling of SiC/SiC Ceramic Matrix Composites and Structures
Micromechanics-Based Modeling of SiC/SiC Ceramic Matrix Composites and Structures Open
The behavior and response of ceramic matrix composites (CMCs), in particular silicon carbide fiber reinforced silicon carbide matrix (SiC/SiC), is affected by many factors such as variation of fiber volume fraction, residual stresses resul…
View article: Verification and Validation of a Rapid Design Tool for the Analysis of the Composite Y-Joint of the D8 Double-Bubble Aircraft
Verification and Validation of a Rapid Design Tool for the Analysis of the Composite Y-Joint of the D8 Double-Bubble Aircraft Open
Polymer composite joints are critical aerospace components for reinforcing lightweight structures and achieving high eco-efficiency transportation standards. Optimizing complex structural joints is an iterative process. Fast and reliable n…
View article: Correction: Multiscale Modeling of Thermoplastics Using Atomistic-informed Micromechanics
Correction: Multiscale Modeling of Thermoplastics Using Atomistic-informed Micromechanics Open
A multiscale model was developed for predicting the thermoelastic behavior of semi-crystalline thermoplastic materials for composite aerospace applications.At the highest scale containing the semi-crystalline spherulite in an amorphous mat…
View article: Multiscale Progressive Failure Analysis of 3D Woven Composites
Multiscale Progressive Failure Analysis of 3D Woven Composites Open
Application of three-dimensional (3D) woven composites is growing as an alternative to the use of ply-based composite materials. However, the design, analysis, modeling, and optimization of these materials is more challenging due to their …
View article: Hierarchical Coupling of Molecular Dynamics and Micromechanics to Predict the Elastic Properties of Three-Phase and Four-Phase Silicon Carbide Composites
Hierarchical Coupling of Molecular Dynamics and Micromechanics to Predict the Elastic Properties of Three-Phase and Four-Phase Silicon Carbide Composites Open
The results obtained from previously conducted molecular dynamics analysis of silicon carbide (-SiC (6H, 4H, & 2H-SiC), -SiC (3C SiC)), silicon and boron nitride, were utilized as inputs in the MAC/GMC micromechanics software to model and …
View article: A Comparison of Different Modeling Strategies for Predicting Effective Properties of 3D Woven Composites
A Comparison of Different Modeling Strategies for Predicting Effective Properties of 3D Woven Composites Open
Three-dimensional (3D) woven composites are an attractive means of achieving superior mechanical performance in aerospace structures. Limited analysis capability currently exists to predict both effective elastic and strength properties fo…
View article: Relevence of 3D Simulations and Sandwich Core Topology for the Modeling of Honeycomb Core Sandwich Panels Undergoing Mode I Delamination
Relevence of 3D Simulations and Sandwich Core Topology for the Modeling of Honeycomb Core Sandwich Panels Undergoing Mode I Delamination Open
A recently developed cohesive zone traction-separation law, which includes the effects of fiber bridging in a novel way, is extended from 2D to 3D. The proposed cohesive model is applied to low fidelity (i.e. homogenized core representatio…
View article: Solution of the Nonlinear High-Fidelity Generalized Method of Cells Micromechanics Relations via Order-Reduction Techniques
Solution of the Nonlinear High-Fidelity Generalized Method of Cells Micromechanics Relations via Order-Reduction Techniques Open
The High-Fidelity Generalized Method of Cells (HFGMC) is one technique, distinct from traditional finite-element approaches, for accurately simulating nonlinear composite material behavior. In this work, the HFGMC global system of equation…
View article: Order-Reduced Solution of the Nonlinear High-Fidelity Generalized Method of Cells Micromechanics Relations
Order-Reduced Solution of the Nonlinear High-Fidelity Generalized Method of Cells Micromechanics Relations Open
The High-Fidelity Generalized Method of Cells (HFGMC) is one technique for accurately simulating nonlinear composite material behavior. The HFGMC uses a higher-order approximation for the subcell displacement field that allows for a more a…
View article: Comparison of Multiscale Method of Cells-Based Models for Predicting Elastic Properties of Filament Wound C/C-SiC
Comparison of Multiscale Method of Cells-Based Models for Predicting Elastic Properties of Filament Wound C/C-SiC Open
Three different multiscale models, based on the method of cells (generalized and high fidelity) micromechanics models were developed and used to predict the elastic properties of C/C-SiC composites. In particular, the following multiscale …
View article: Computational Implementation of a Thermodynamically Based Work Potential Model for Progressive Microdamage and Transverse Cracking in Fiber-reinforced Laminates
Computational Implementation of a Thermodynamically Based Work Potential Model for Progressive Microdamage and Transverse Cracking in Fiber-reinforced Laminates Open
A continuum-level, dual internal state variable, thermodynamically based, work potential model, Schapery Theory, is used capture the effects of two matrix damage mechanisms in a fiber-reinforced laminated com-posite: microdamage and transv…
View article: A Multiscale Computational Model Combining a Single Crystal Plasticity Constitutive Model with the Generalized Method of Cells (GMC) for Metallic Polycrystals
A Multiscale Computational Model Combining a Single Crystal Plasticity Constitutive Model with the Generalized Method of Cells (GMC) for Metallic Polycrystals Open
A multiscale computational model is developed for determining the elasto-plastic behavior of polycrystal metals by employing a single crystal plasticity constitutive model that can capture the microstructural scale stress field on a finite…
View article: FEAMAC/CARES Stochastic-Strength-Based Damage Simulation Tool for Ceramic Matrix Composites
FEAMAC/CARES Stochastic-Strength-Based Damage Simulation Tool for Ceramic Matrix Composites Open
Reported here is a coupling of two NASA developed codes: CARES (Ceramics Analysis and Reliability Evaluation of Structures) with the MAC/GMC (Micromechanics Analysis Code/ Generalized Method of Cells) composite material analysis code. The …
View article: The EST Model for Predicting Progressive Damage and Failure of Open Hole Bending Specimens
The EST Model for Predicting Progressive Damage and Failure of Open Hole Bending Specimens Open
Progressive damage and failure in open hole composite laminate coupons subjected to flexural loading is modeled using Enhanced Schapery Theory (EST). Previous studies have demonstrated that EST can accurately predict the strength of open h…
View article: Fatigue Analysis of Notched Laminates: A Time-Efficient Macro-Mechanical Approach
Fatigue Analysis of Notched Laminates: A Time-Efficient Macro-Mechanical Approach Open
A coupled transversely isotropic deformation and damage fatigue model is implemented within the finite element method and was utilized along with a static progressive damage model to predict the fatigue life, stiffness degradation as a fun…
View article: A Numerical Study on the Effect of Facesheet-Core Disbonds on the Buckling Load of Curved Honeycomb Sandwich Panels
A Numerical Study on the Effect of Facesheet-Core Disbonds on the Buckling Load of Curved Honeycomb Sandwich Panels Open
A numerical study on the effect of facesheet-core disbonds on the post-buckling response of curved honeycomb sandwich panels is presented herein. This work was conducted as part of the development of a damage tolerance approach for the nex…
View article: Combining material and model pedigree is foundational to making ICME a reality
Combining material and model pedigree is foundational to making ICME a reality Open
With the increased emphasis on reducing the cost and time to market of new materials, the need for analytical tools that enable the virtual design and optimization of materials throughout their processing-internal structure-property-perfor…
View article: The Effect of Stochastically Varying Creep Parameters on Residual Stresses in Ceramic Matrix Composites
The Effect of Stochastically Varying Creep Parameters on Residual Stresses in Ceramic Matrix Composites Open
Constituent properties, along with volume fraction, have a first order effect on the microscale fields within a composite material and influence the macroscopic response. Therefore, there is a need to assess the significance of stochastic …
View article: Multiscale Static Analysis of Notched and Unnotched Laminates Using the Generalized Method of Cells
Multiscale Static Analysis of Notched and Unnotched Laminates Using the Generalized Method of Cells Open
Peer Reviewed
View article: Progressive Damage and Failure Prediction of Open Hole Tension and Open Hole Compression Specimens
Progressive Damage and Failure Prediction of Open Hole Tension and Open Hole Compression Specimens Open
Peer Reviewed