The Story of Permeability in Liquid Composite Molding (LCM): How to Devise and Validate Process Simulation Software?

13 Apr 2022 | Contributor(s): Francois Trochu

Permeability characterizes the capability of establishing a fluid flow through a porous medium. This lecture aims to present a summary on the state-of-the-art knowledge on permeability in LCM together with a discussion on open questions. The Story of Permeability in Liquid Composite Molding (LCM)...

Capillary Effects in Fiber Reinforced Polymer Composite Processing: A Zoom on the Flow Front

06 Apr 2022 | Contributor(s): Véronique Michaud

Capillarity plays a major role in many natural and engineered systems, from nutrient delivery in plants, management of humidity in soils, to heat pipes and porous systems for spill recovery. In composite manufacturing, particularly in Liquid Composite Molding processes, capillary effects take...

Composite Materials: Where We are and Where to Go (Mechanical and Electrical Properties of Polymer Composites)

02 Mar 2022

Composite materials have developed in the last 60 years from a just new material into a class of established engineering material with surprisingly outstanding properties. Best demonstrated as being the material of choice in the aerospace industry. The idea of fibre reinforced composites was to...

Hierarchical Multi-Response Gaussian Processes for Uncertainty Analysis with Multi-Scale Composite Manufacturing Simulation

23 Feb 2022 | Contributor(s): kai kai zhou zhou, Ryan Scott Enos, Dianyun Zhang

Variations of constituent fiber and matrix properties and process conditions can cause significant variability in composite parts and affect their performance.  The focus of this paper is to establish a new computational framework that can efficiently quantify the uncertainty propagation of...

Fiber-Optic-Based In-Process Monitoring of CFRP Structures for Material Quality Assurance

27 Jan 2022 | Contributor(s): Nobuo Takeda

Although carbon fiber reinforced polymer (CFRP) composites have been used extensively in many aerospace structures such as Boeing 787 and Airbus 350, low-cost and high-rate production CFRP are highly demanded for next-generation single-aisle commercial aircraft. Competition has been increasing...

Fibrous Shell Approach and 3D Second Gradient Modeling for Textile Composite Draping

10 Dec 2021 | Contributor(s): Philippe Boisse

Composite manufacturing processes are often complex and process simulation is a way to avoid costly trial-anderror development. Simulations of composites textile reinforcements draping use shell finite elements for which the bending behavior is very particular. The fibrous composition of the...

A Semi-Discrete Model for Progressive Damage and Failure of Fiber Reinforced Laminates

15 Nov 2021 | Contributor(s): Anthony M Waas

High-strength and high-stiffness carbon fiber-reinforced polymer composite laminates (CFRP) are being increasingly used for primary load bearing structures in many industries. The most common material system used is based on thermoset resins (matrix material), which come in the form of convenient...

Control of Reaction Fronts for Rapid Energy-Efficient Manufacturing of Multifunctional Polymers and Composites

04 Jun 2021

This lecture describes a new manufacturing platform technology that allows for near net-zero energy fabrication of structural polymers and composites. The approach is predicated on the exploitation of a self-propagating polymerization reaction occurring in a system undergoing reaction and...

Sustainable Manufacturing of Composite Materials

21 May 2021 | Contributor(s): Pascal Hubert

The growing use of composite materials in aerospace, transportation, recreational products and renewable energy production manufacturing has created a critical need for low-cost sustainable manufacturing methods. The current methods of consolidation and cure are not compatible with the projected...

Rheology of Carbon Fiber Thermoplastic Polymer Composites

26 Apr 2021 | Online Presentations | Contributor(s): Byron Pipes

The rheology of fiber–reinforced thermoplastic composites will be presented with specific focus on several topics studied over the past three decades. Interest in the elongational viscosity of collimated, discontinuous fiber systems was initiated by the introduction of impregnated,...

Practical Developments in Multiscale Modeling of Composites

07 Apr 2021 | Online Presentations | Contributor(s): Steven Arnold

Validated models (be they data driven or physics based) can accelerate the design, certification, and ultimate deployment of novel materials and structures by allowing rapid iteration and virtual experimentation while at the same time minimizing the need for expensive and time consuming physical...

Jupyter Notebook (hub version 6.0)

10 Mar 2021 | Tools

Jupyter notebook running in anaconda-6 environment

Advances in Polymer Composites' Tribology

05 Mar 2021 | Online Presentations

In numerous friction and wear applications, the use of polymers and polymer composites has become state of the art. Nevertheless, further developments are still under way to explore new fields of application for these materials and to tailor their properties under more extreme loading conditions....

Recent Developments in Computational Approaches to Model Laminated Composite Shells and Damage and Fracture in Solids

16 Feb 2021 | Online Presentations

In this lecture, two different topics of considerable interest to composite materials and structural mechanics communities are discussed. The first topic deals with the development of locking-free shell finite elements with thickness stretch for the nonlinear analysis of isotropic and laminated...

VABS: Modeling Composite Beam-like Structures with 3D FEA Fidelity

06 Feb 2021 | Online Presentations | Contributor(s): Wenbin Yu

This presentation was given at Altair Virtual ATCx Composites: https://atcxcomposites.virtual.altair.com/. Variational asymptotic beam section (VABS) is a unique technology continuously funded by the US Army since 1988 and it has become a tool of choice in the helicopter and wind turbine...

Structure Genome: a Unified Multiscale Approach to Bridging Materials Genome and Structural Analysis

06 Feb 2021 | Online Presentations | Contributor(s): Wenbin Yu

This Talk was given at GALCIT (Graduate Aerospace Laboratories of the California Institute of Technology): https://galcit.caltech.edu/events/89673​ Materials Genome Initiative (MGI) and Integrated Computational Materials Engineering (ICME) aim to accelerate discovery, developing, manufacturing,...

Novel Powder Epoxy Composites for Thick-Section Structures

25 Jan 2021 | Online Presentations | Contributor(s): Conchur O'Bradaigh

This seminar discusses the ongoing work at The University of Edinburgh on the processing, design and testing of thicksection composites for industrial structures such as large wind and tidal turbine blades, via powder epoxy resin systems. Thick-section composite parts are difficult to manufacture...

Emerging Role of Process Models & Simulations in Composites Manufacturing

07 Dec 2020 | Online Presentations | Contributor(s): Suresh Advani

This talk will highlight the ever increasing benefits of process modeling in Composite Manufacturing processes. First, the use of science base approach of materials processing, which integrates material parameters with transport phenomena at various scales during manufacturing to create...

The Challenges of Determining the Strength of Composites

24 Nov 2020 | Online Presentations | Contributor(s): Michael R Wisnom

Why are there such large differences in reported strengths of composites? Some of the reasons are the definition of strength, material variability, poor test methods, and subtle variations in carrying out the tests. But there are other important factors that affect strength that are not...

iVABS

19 Nov 2020 | Downloads | Contributor(s): Su Tian, Haodong Du, Fei Tao, Wenbin Yu

iVABS (namely integrated VABS), is a design framework for composite slender structures (also called composite beams) such as helicopter rotor blades, wind turbine blades, high aspect ratio wings, bridges, shafts, etc. This framework bundles PreVABS, VABS, GEBT, Dakota, along with msgpi for...