Solid-mechanics finite element simulations of the draping of fabrics: a sensitivity analysis

Dong, Li Min; Lekakou, Constantina; Bäder, Michael

doi:10.1016/s1359-835x(00)00046-4

Cited by 38 publications

(30 citation statements)

References 14 publications

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“…Whilst the simple kinematic models compute very quickly they cannot deliver in areas such as predicting loads, the forming of stacks of plies and the generation of some sorts of forming defects such as wrinkles. To meet these requirements, simulations based on mechanics solved by FEA were developed [16,17,18]. In principle these offer much improved fidelity, but at the cost of significantly longer computation times and a significant level of materials characterisation is needed.…”

Section: Drape Modellingmentioning

confidence: 99%

‘But How Can We Make Something Useful Out of Black String?’ The Development of Carbon Fibre Composites Manufacturing (1965–2015)

Potter

2016

The Structural Integrity of Carbon Fiber Composites

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Abstract.This chapter looks at how the manufacturing community responded to the invention of carbon fibres, the first practical, high-modulus, reinforcement to be available as continuous fibres; largely through the lens of the author's personal experience. Whilst it seems axiomatic to us today that we use continuous fibres, most of the composites applications in 1965 used short fibres, for example chopped glass, asbestos, whiskers or linen fibres. To a large extent the narrative of carbon fibre composites manufacturing is the story of how to manipulate continuous fibres into complex geometries; and how to do that cost-effectively without introducing strength reducing defects. Until very recently, when the manufacturing and structural integrity communities have started to interact much more, there has tended to be an almost complete disconnect between the materials, design and manufacturing worlds. This has been the case as much in industry as it has in academia and seems to have been the norm since the very beginnings of the application of carbon fibre composites. The difficulties inherent in manufacturing geometrically complex parts were identified very early in the history of carbon fibre composites. However, it has proven to be very challenging to go beyond identifying problem issues to actually solving them, and that process is by no means complete. There are signs that the composites community may finally be on the right track, with some recent successes pointing towards research directions where design and manufacturing approaches can be unified to deliver reliable and cost-effective parts -only 50 years after the process started.

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Section: Drape Modellingmentioning

confidence: 99%

‘But How Can We Make Something Useful Out of Black String?’ The Development of Carbon Fibre Composites Manufacturing (1965–2015)

Potter

2016

The Structural Integrity of Carbon Fiber Composites

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“…Even if the draping simulation of fabrics has been extensively studied in [3][4][5][6]. Only a small amount of research has been devoted to the computer definition of the fiber trajectories in AFP.…”

Section: Introductionmentioning

confidence: 99%

“…In [4,5], the case of the woven fabrics is considered. The weft and wrap directions are defined by computing the crossing points of the fibers.…”

Section: Introductionmentioning

confidence: 99%

A modified Fast Marching Method for defining fiber placement trajectories over meshes

Bruyneel¹,

Zein²

2013

Computers & Structures

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In this paper, we study the efficiency of applying the numerical simulation of a moving interface to the problem of defining fiber placement trajectories for composite structures. This new approach, which is based on an adaptation of the Fast Marching method, presents two advantages. Firstly, it simulates accurately the mechanism of an Automated Fiber Placement (AFP) machine by producing equidistant fiber courses, which avoids avoiding undesirable gaps or overlaps between the successive courses, while allowing to exploit the full capacity of the machine. Secondly, it is able to handle complex surfaces by working directly on the mesh instead of the geometric equation. Consequently, this new approach directly provides the local orientation of the fibers inside each mesh element, what is relevant for a finite element structural analysis.This approach is illustrated through some numerical examples taken from real case studies, for straight and curved fiber trajectories.

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“…Initial solid mechanics finite element studies within the Composites Group at the University of Surrey, UK [12], considered an "air layer" of very low modulus between the mould and the fabric to simulate the slipping between surfaces.They were followed by finite element simulations and parametric studies [16] where friction properties were considered between the surfaces of fabric and mould. However, in the latter studies the material behaviour was not updated during shear.…”

Section: Introductionmentioning

confidence: 99%

Processing of Composites: Simulations of the Draping of Fabrics with Updated Material Behaviour Law

Dong¹,

Lekakou²,

Bäder

2001

Journal of Composite Materials

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In the processing of composites, fibre reinforcement is draped over complex three dimensional geometries, yielding local variations in the fibre volume fraction and fibre orientation with subsequent effects on the permeability of the reinforcement during resin infiltration and on the properties of the composite product. This study presents computer simulations of the draping of fabrics by following a mechanical, finite element approach. The fabric is considered as a solid continuum with mechanical properties and friction properties at interfaces. The problem is solved by applying an explicit dynamic finite element analysis. In order to incorporate the large shear deformation of fabric during draping, an updated material behaviour law was formulated on the basis of changing fibre directions. The model was implemented in a user computer subroutine and tested first in case-studies of simple in-plane shear where the predictions were also compared with experimental data from a picture frame type of shear test. Thereafter, numerical simulations focused on the draping of a fabric in a "hat" shaped mould, comprising a hemispherical cup with a wide flat rim. The predictions were compared with predictions from similar simulations without the updated material behaviour law, experimental data and predictions from a "fishnet" algorithm.

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Solid-mechanics finite element simulations of the draping of fabrics: a sensitivity analysis

Cited by 38 publications

References 14 publications

‘But How Can We Make Something Useful Out of Black String?’ The Development of Carbon Fibre Composites Manufacturing (1965–2015)

‘But How Can We Make Something Useful Out of Black String?’ The Development of Carbon Fibre Composites Manufacturing (1965–2015)

A modified Fast Marching Method for defining fiber placement trajectories over meshes

Processing of Composites: Simulations of the Draping of Fabrics with Updated Material Behaviour Law

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