All Outputs (31)

Benchmark exercise on image-based permeability determination of engineering textiles: Microscale predictions (2023)
Journal Article

Permeability measurements of engineering textiles exhibit large variability as no standardization method currently exists; numerical permeability prediction is thus an attractive alternative. It has all advantages of virtual material characterization... Read More about Benchmark exercise on image-based permeability determination of engineering textiles: Microscale predictions.

Controlling resin flow in Liquid Composite Moulding processes through localized irradiation with ultraviolet light (2022)
Journal Article

A vacuum infusion process was implemented to produce composite specimens from a random glass filament mat and an acrylic modified polyester resin curable upon irradiation with ultraviolet (UV) light. Through localized irradiation with UV light during... Read More about Controlling resin flow in Liquid Composite Moulding processes through localized irradiation with ultraviolet light.

Out-of-plane permeability measurement for reinforcement textiles: A benchmark exercise (2021)
Journal Article

The out-of-plane permeability of two glass fibre fabrics was measured by 26 institutions using silicone oil as a test fluid. Participants in this study were free to select the test procedure, specimen dimensions and data analysis method, provided tha... Read More about Out-of-plane permeability measurement for reinforcement textiles: A benchmark exercise.

Analysis of contact area in a continuous application-and-peel test method for prepreg tack (2021)
Journal Article

The relationship between prepreg tack and the degree of intimate contact (DoIC) between prepreg and a rigid substrate was explored in the context of a continuous application-and-peel test method. Tack for a unidirectional prepreg tape was characteris... Read More about Analysis of contact area in a continuous application-and-peel test method for prepreg tack.

Bayesian inversion algorithm for estimating local variations in permeability and porosity of reinforcements using experimental data (2021)
Journal Article

Experimental characterisation of textile compaction response: A benchmark exercise (2020)
Journal Article

This paper reports the results of an international benchmark exercise on the measurement of fibre bed compaction behaviour. The aim was to identify aspects of the test method critical to obtain reliable results and to arrive at a recommended test pro... Read More about Experimental characterisation of textile compaction response: A benchmark exercise.

Adaptation of material deposition parameters to account for out-time effects on prepreg tack (2020)
Journal Article

A single-stage peel method was employed to determine the relationship between key processing parameters and tack for a standard aerospace carbon/epoxy prepreg subjected to various levels of room-temperature out-time. The temperature-dependent viscoel... Read More about Adaptation of material deposition parameters to account for out-time effects on prepreg tack.

Modelling the permeability of random discontinuous carbon fibre preforms (2020)
Journal Article

A force-directed algorithm was developed to create representative geometrical models of fibre distributions in Directed Carbon Fibre Preforms (DCFP). Local permeability values were calculated for the preform models depending on the local fibre orient... Read More about Modelling the permeability of random discontinuous carbon fibre preforms.

A reference specimen for compaction tests of fiber reinforcements (2019)
Journal Article

Compaction behavior of textiles has a major influence on the outcome of various manufacturing processes for fiber reinforced polymer composites. Nevertheless, no standard exists up to date which specifies test methods or test rigs. A recent internati... Read More about A reference specimen for compaction tests of fiber reinforcements.

Simulation of the forming process for curved composite sandwich panels (2019)
Journal Article

© 2019, The Author(s). For affordable high-volume manufacture of sandwich panels with complex curvature and varying thickness, fabric skins and a core structure are simultaneously press-formed using a set of matched tools. A finite-element-based proc... Read More about Simulation of the forming process for curved composite sandwich panels.

A novel criterion for the prediction of meso-scale defects in textile preforming (2019)
Journal Article

© 2019 The Authors In numerical simulations of reinforcement preforming, fabrics are often modelled using continuum approaches with homogenised material properties in order to reduce the computational costs. To predict the occurrence of meso-scale de... Read More about A novel criterion for the prediction of meso-scale defects in textile preforming.

In-plane permeability characterization of engineering textiles based on radial flow experiments: a benchmark exercise (2019)
Journal Article

Efficient process design for Liquid Composite Moulding requires knowledge of the permeability, which quantifies textile conductance for liquid flow. Yet, existing textile characterization methods have not yet been standardized, although good progress... Read More about In-plane permeability characterization of engineering textiles based on radial flow experiments: a benchmark exercise.

Characterisation and modelling of complex textile geometries using TexGen (2018)
Conference Proceeding

TexGen is open source software developed at the University of Nottingham for the geometric 3D modelling of textiles and textile composites. It has a large number of users worldwide and underpins a significant number of research publications. Whil... Read More about Characterisation and modelling of complex textile geometries using TexGen.

Characterisation of tack for uni-directional prepreg tape employing a continuous application-and-peel test method (2018)
Journal Article

Employing a test method with coupled application and peel phases, tack was characterised for a UD prepreg tape. Different aspects of tack were explored by varying test parameters and material condition. In addition, different surface combinations wer... Read More about Characterisation of tack for uni-directional prepreg tape employing a continuous application-and-peel test method.

Optimisation of local in-plane constraining forces in double diaphragm forming (2018)
Journal Article

© 2018 Elsevier Ltd Rigid blocks (risers) were introduced in the double diaphragm forming (DDF) process to change the local in-plane strain distribution in the diaphragms, aimed at reducing wrinkling defects in the production of fabric preforms. A tw... Read More about Optimisation of local in-plane constraining forces in double diaphragm forming.

Frictional behaviour of non-crimp fabrics (NCFs) in contact with a forming tool (2018)
Journal Article

Microscopic observation and analysis are used to examine the role that contact conditions play in determining the frictional behaviour of non-crimp fabrics (NCFs). The true fibre contact length is measured over a range of normal pressures. For the NC... Read More about Frictional behaviour of non-crimp fabrics (NCFs) in contact with a forming tool.

Influence of the micro-structure on saturated transverse flow in fibre arrays (2018)
Journal Article

This study analyses the influence of the random filament arrangement in fibre bundles on the resin flow behaviour. Transverse steady-state resin flow which occurs behind a liquid resin flow front was simulated numerically through statistically equiva... Read More about Influence of the micro-structure on saturated transverse flow in fibre arrays.

Effect of yarn cross-sectional shape on resin flow through inter-yarn gaps in textile reinforcements (2017)
Journal Article

Axial flow through gaps between aligned straight yarns with realistic cross-sectional shapes, described by power-ellipses, was analysed numerically. At a given fibre volume fraction, equivalent gap permeabilities have a maximum at minimum size of elo... Read More about Effect of yarn cross-sectional shape on resin flow through inter-yarn gaps in textile reinforcements.

“BAM”: a collaborative R&D project for the development of a simulation based solution for the design and manufacture of 3D woven composites (2017)
Conference Proceeding

Breakthrough Aerospace Materials (BAM) is a collaborative R&D project based in the UK [1]; led by industry and co-funded by the British Government via the Innovate-UK under its Aerospace Technology Institute (ATI) R&T Programme. The overall objective... Read More about “BAM”: a collaborative R&D project for the development of a simulation based solution for the design and manufacture of 3D woven composites.

Double diaphragm forming simulation for complex composite structures (2017)
Journal Article

A finite element (FE) model has been developed to simulate the double diaphragm forming (DDF) process, to identify potential defects when forming complex 3D preforms from 2D biaxial non-crimp fabric plies. Three different metrics have been introduced... Read More about Double diaphragm forming simulation for complex composite structures.