Louvain-la-Neuve, Belgium
Louvain-la-Neuve, Belgium

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Agency: European Commission | Branch: FP7 | Program: CSA-CA | Phase: NMP.2013.2.3-2 | Award Amount: 880.60K | Year: 2013

Scope of this proposal is to establish a network of stakeholders - an Integrative Computational Materials Engineering expert group (ICMEg) - aiming at the creation of an open, global standard for information exchange between a heterogeneous variety of commercial and academic simulation tools. The vision of the ICMEg proposal is a new strategy of materials and process development, where a variety of academic and commercial simulation tools present and future can be easily combined across different process steps and bridging several length scales in a plug&play type architecture being based on an object oriented, standardized information exchange. Multi-scale in this context covers electronic, atomistic,mesoscopic and continuum models The Mission of ICMEg is to establish and to maintain a network of contacts to (1) simulation software providers around the world (2) governmental and international standardization authorities (3) ICME type users of simulation software (4) different associations in the area of materials and processing (5) academic developers of simulation software to define an ICME language in form of an open and standardized communication protocol to stimulate knowledge sharing in the field of multiscale materials design to communicate this standard worldwide to make it widely accepted to discuss and to decide about future amendments to the initial standard to establish a legal body for a sustainable further development The Approach of ICMEg to realize both its vision and its mission is to create a global network of all stakeholders in the area of ICME software and users by identifying all actors in the field of ICME related simulations creating an inventory of these stakeholders networking of all identified stakeholders in two international conferences composing a directory of all available simulation approaches establishing a common language for standardized information exchange secure sustainable further the common language by foundation of an international association identifying missing models and functionalities and proposing a roadmap for their development

Schmitz G.J.,Access e.V. | Engstrom A.,Thermo Calc Software | Bernhardt R.,Simufact Engineering GmbH | Prahl U.,RWTH Aachen | And 7 more authors.
JOM | Year: 2015

The Integrated Computational Materials Engineering expert group (ICMEg), a coordination activity of the European Commission, aims at developing a global and open standard for information exchange between the heterogeneous varieties of numerous simulation tools. The ICMEg consortium coordinates respective developments by a strategy of networking stakeholders in the first International Workshop on Software Solutions for ICME, compiling identified and relevant software tools into the Handbook of Software Solutions for ICME, discussing strategies for interoperability between different software tools during a second (planned) international workshop, and eventually proposing a scheme for standardized information exchange in a future book or document. The present article summarizes these respective actions to provide the ICME community with some additional insights and resources from which to help move this field forward. © 2015 The Minerals, Metals & Materials Society

Doghri I.,Catholic University of Louvain | Adam L.,e Xstream engineering SA | Bilger N.,e Xstream engineering L
International Journal of Plasticity | Year: 2010

We propose a general formulation - which we believe to be new - for the mean-field homogenization of inclusion-reinforced elasto-viscoplastic composites assuming small strains. Our proposal is based on an interplay between constitutive equations and numerical algorithms, and the key ideas behind it are the following. The evolution equations for inelastic strain and internal variables at the beginning of each time interval are linearized around the ending time of the same interval. The linearized equations are then numerically integrated using a fully implicit backward Euler scheme. The obtained algebraic equations lead to an incrementally affine stress-strain relation which involves two important terms. The first one is the algorithmic tangent operator, obtained by consistent linearization of the time discretized constitutive equations. The second term is a new one and called an affine strain increment. The proposal leads to thermoelastic-like relations directly in the time domain, and not in the Laplace-Carson (L-C) one. There is no need for viscoelastic-type integral rewriting of the evolution equations, for L-C transforms, or for numerical inversion back from L-C to time domains. The proposed method can be readily applied to sophisticated elasto-viscoplastic models with an arbitrary set of scalar or tensor internal variables, and is valid for multi-axial, non-monotonic and non-proportional loading histories. The theory is applied in detail to a well-known constitutive model, and verified against finite element simulations of representative volume elements or unit cells, for a number of composite materials. © 2009 Elsevier Ltd. All rights reserved.

Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: FoF.NMP.2013-10 | Award Amount: 4.29M | Year: 2013

The proposed project aims to the development of an ecological and innovative coating for composite parts which may be able to eliminate the styrene emissions from the workplace. Additionally, this type of coating will deliver improved production perfomance in terms of quality and dramatic reduction of associated operational costs which currently burden the progress of composite materials worldwide. Very much like the painting industry changed in the 1950s to the use of dry powders in order to replace existing liquid paints; the liquid gel coats used in the composites industry may be replaced likewise with a proper dry powder technology. This project is meant to prove this fact as well as providing the tools to implement this novel material into a real production of composite parts. The combination of new developments in efficiently heated tools, mould design and reinforced preforms with this ecological coating will provide an excellent platform to modernizing current composites manufacturing technologies.

Doghri I.,Catholic University of Louvain | Brassart L.,Catholic University of Louvain | Adam L.,E Xstream Engineering SA | Gerard J.-S.,E Xstream Engineering SA
International Journal of Plasticity | Year: 2011

In this paper, the incremental formulation for the mean-field homogenization (MFH) of elasto-plastic composites is enriched by including second statistical moments of per-phase strain increment fields, thus combining two advantages. The first one is to handle non-monotonic loading histories and the second is to better account for the heterogeneity of microscopic fields. The proposal is currently restricted to elasto-plasticity with J2 flow theory in each phase, under the small perturbation hypothesis. The formulation crucially exploits the return mapping algorithm for the J2 model, with its two steps: elastic predictor, and plastic corrections. It is shown that the second-moment measure of the average von Mises stress in each phase at the elastic predictor step plays a major role in the computation of both the average stress and the comparison tangent operator. The proposal is implemented for an extended Mori-Tanaka scheme. Predictions are compared to results provided by full-field, finite element computations of representative volume elements or unit cells, for various composite materials, with polymer or metal matrices. There are cases where the predictions of the proposed modeling improve significantly over those of a first-order incremental formulation. © 2010 Elsevier Ltd. All rights reserved.

Kammoun S.,Catholic University of Louvain | Doghri I.,Catholic University of Louvain | Adam L.,E Xstream Engineering SA | Robert G.,Rhodia | Delannay L.,Catholic University of Louvain
Composites Part A: Applied Science and Manufacturing | Year: 2011

This paper presents a new model and an experimental investigation of the elastic-plastic flow until failure in short-fiber reinforced thermoplastics typically produced by injection molding. The distribution of fiber orientations and lengths is reproduced statistically within a representative volume element (RVE) of the composite microstructure. Then, the RVE is decomposed fictitiously into pseudo-grains (PGs) inside of which the fiber orientation and aspect ratio are unique. An incremental Mori-Tanaka model is used to predict the phase averages of the stresses and strains inside each PG. Damage intervenes in a second homogenization step: the macroscopic stress accounts for the fact that PGs fail one after the other in function of the fiber orientation and the applied strain mode. Hence, the model is called "first pseudo-grain failure model" by analogy with the "first ply failure model" in laminated composites. An evaluation of the proposed model against experimental data is conducted for short-glass-fiber reinforced polyamide 6,6 (PA6,6). It is shown that the model yields satisfactory predictions of the response under uniaxial tension of composite samples with different fiber contents cut under various directions relative to the main injection flow direction. © 2011 Elsevier Ltd. All rights reserved.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: NMBP-23-2016 | Award Amount: 3.90M | Year: 2017

The mission of COMPOSELECTOR is to develop a Business Decision Support System (BDSS), which integrates materials modelling, business tools and databases into a single workflow to support the complex decision process involved in the selection and design of polymer-matrix composites (PMCs). This will be achieved by means of an open integration platform which enables interoperability and information management of materials models and data and connects a rich materials modelling layer with industry standard business process models. In order to satisfy the need for effectively designing and producing increasingly sophisticated materials, components and systems with advanced performance on a competitive time scale there is a particular need in industry for chemistry/physics-based materials models and modelling workflows which capture the performance of materials, accounting for material internal microstructure and effects of processing, provide accuracy/validation of predicted data, and relevant management of uncertainty and assemble knowledge ready for decision makers to act upon. COMPOSELECTOR will address these needs by integration of (discrete and continuum) materials models and process models as well as structured and unstructured data into a standards-based, open integration framework, implementing uncertainty management and multi-criteria optimisation in order to provide actionable choices, and building tailored knowledge apps to support decision makers. The human interface of COMPOSELECTOR will be supported by Visual Analytics capable of integrating qualitative, quantitative and cognitive aspects for a user-friendly management of the vast quantity of available data. The COMPOSELECTOR BDSS will be applied to and validated by end users targeting accurate, reliable, efficient and cost effective decision-making and management of polymer matrix composite (PMC) materials in the transport and aerospace value chains.

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