Digital Disruption of Composites Manufacturing and Design
18 Sep 2020 | Online Presentations | Contributor(s): Anoush Poursartip
Composite materials and structures are an excellent example of how engineering practice often outpaces scientific knowledge. Born in the analog world of the 1960s, carbon-fibre composites manufacturing and design practice is a complex and often fragile construct that is primarily driven by the...
A Manufacturing Sensitive Design Strategy for Composite Materials Using Physical Modeling and Stochastic Simulation of Defects
02 Oct 2020 | Online Presentations | Contributor(s): Ramesh Talreja
This presentation outlines a strategy for designing composite structures accounting for the presence of defects that are inevitable in a practical manufacturing process. The essential ingredients of the strategy are incorporation of defects in physical models for assessment of composite...
Defect Coupling Predicting the Strength and Life of Fiberous Composite Laminates
16 Oct 2020 | Online Presentations | Contributor(s): Kenneth L Reifsnider
After more than 30 years of careful experimental investigation and exhaustive development of discrete damage analysis methods including integrated computational mechanics methods, our community knows a great deal about how discrete defects such as matrix cracks and defect growth (e.g....
Automating the Lay-up of Geometrically Complex Composite Structures Made from Preimpregnated Reinforcements: a Route to a Roadmap
04 Nov 2020 | Online Presentations | Contributor(s): Kevin Potter
A significant amount of research and industrial effort has been expended on the development of equipment such as automated fibre placement machines to lay-up prepregged reinforcements into structures of relatively simple geometry such as wing skins and spars, and fuselage structures. These...
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...
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...
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...
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...
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....
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...
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, stretch...
Sustainable Manufacturing of Composite Materials
21 May 2021 | Online Presentations | 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...
Control of Reaction Fronts for Rapid Energy-Efficient Manufacturing of Multifunctional Polymers and Composites
04 Jun 2021 | Online Presentations
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...
A Semi-Discrete Model for Progressive Damage and Failure of Fiber Reinforced Laminates
15 Nov 2021 | Online Presentations | 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...
Fibrous Shell Approach and 3D Second Gradient Modeling for Textile Composite Draping
10 Dec 2021 | Online Presentations | 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...
Fiber-Optic-Based In-Process Monitoring of CFRP Structures for Material Quality Assurance
27 Jan 2022 | Online Presentations | 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...
Composite Materials: Where We are and Where to Go (Mechanical and Electrical Properties of Polymer Composites)
02 Mar 2022 | Online Presentations
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...
Capillary Effects in Fiber Reinforced Polymer Composite Processing: A Zoom on the Flow Front
06 Apr 2022 | Online Presentations | 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...
The Story of Permeability in Liquid Composite Molding (LCM): How to Devise and Validate Process Simulation Software?
13 Apr 2022 | Online Presentations | 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)...
Multiscale Modeling of Damage Mechanics of Fiber Reinforced Polymer Composites From Micro- to Macroscale: The (Virtual) Reality and Challenges Ahead
13 May 2022 | Online Presentations | Contributor(s): Wim VAN PAEPEGEM
Multi-scale modelling of composites is a very active topic in composites science. This is illustrated by the numerous sessions in the recent European and International Conferences on Composite Materials, but also by the fast developments in multi-scale modelling software tools, developed by large...
Adaptive Multi-Scale & Multi-Fidelity Progressive Failure Analysis of Composites
14 Nov 2022 | Online Presentations | Contributor(s): Tong-Earn (TE) Tay
Although high-fidelity modeling of progressive damage has advanced our understanding of failure mechanisms in fibre-reinforced composites, such techniques are currently still too computationally intensive for direct application to composite structures. The multi-scale nature of damage in...
Master Laminates to Simplify Design, Manufacturing, and Testing of Composites
12 Dec 2022 | Online Presentations | Contributor(s): Stephen W Tsai
Composite materials and structures have traditionally been viewed as more complicated than metals. With master stiffness and failure envelopes composites are as simple as metals. Stiffness of laminates can be split into two part: one for trace that represents the total stiffness capacity; one for...
Fiber Orientation Prediction for Discontinuous Fiber Composites: Fundamentals and Future Trends
08 Feb 2023 | Online Presentations | Contributor(s): Charles Tucker
When composite materials with discontinuous fibers are processed into their final shape, any flow alters the fiber orientation pattern and affects the properties of the final composite. It is now standard practice to predict fiber orientation patterns and the resulting mechanical properties in...
Imparting Robustness to Out-of-Autoclave Prepregs
09 Mar 2023 | Online Presentations | Contributor(s): STEVEN NUTT
Autoclaves have long been used to ensure robustness in the production of composite parts. However, they present a production bottleneck, as well as high capital and recurring costs. Out-of-autoclave prepregs were introduced to allow oven curing and thereby address some of these issues. These OoA...