A process performance index based on gate-distance and incubation time for the optimization of gate locations in liquid composite molding processes

Sánchez, Fernando; Garcı́a, Juan Antonio; Chinesta, Francisco; Gascón, Ll.; Zhang, C.; Liang, Zhiyong; Wang, B.

doi:10.1016/j.compositesa.2005.01.016

Cited by 18 publications

(18 citation statements)

References 24 publications

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“…On the applied side, important technological processes such as liquid composite molding [11] are driven by growing radial interfaces. The theoretical study of this sort of systems is often based on detailed numerical simulations, which could be simplified using eikonal descriptions like the stochastic growth equations presented here.…”

Section: Discussionmentioning

confidence: 99%

“…Biological systems are also characterized by an approximate spherical symmetry: bacterial colonies [7], fungi [8], epithelial cells [9], and cauliflowers [10] develop rough surfaces which are not describable from a planar reference frame. Also, different contexts like the technological liquid composite molding [11], geological processes as stromatolite morphogenesis [12], and chemical structures [13] provide examples of interfaces that either become larger as time evolves or have a curved geometry, revealing the broad presence of this phenomenon in the natural world.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of curved interfaces

Escudero

2009

Annals of Physics

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Stochastic growth phenomena on curved interfaces are studied by means of stochastic partial differential equations. These are derived as counterparts of linear planar equations on a curved geometry after a reparametrization invariance principle has been applied. We examine differences and similarities with the classical planar equations. Some characteristic features are the loss of correlation through time and a particular behaviour of the average fluctuations. Dependence on the metric is also explored. The diffusive model that propagates correlations ballistically in the planar situation is particularly interesting, as this propagation becomes nonuniversal in the new regime.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamics of curved interfaces

Escudero

2009

Annals of Physics

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“…In contrast to the distance criterion proposed in [2], [3], [20], [21], where the optimal flow pattern in each time instant must be vent oriented, if the FPDS-1D is developed from the inlet point, the flow front appears as a straight line, as the flow has a radial inlet behaviour, Figure 4 (bottom). Then, the ideal flow front behaviour is only vent oriented nearby the outlet but is inlet-gate oriented, nearby the inlet.…”

Section: Figure 5 Skeleton (Left)optimal Inlet (Right)mentioning

confidence: 89%

“…The key idea to use these spaces in on-line control strategies is to represent the mould geometry in an alternative Cartesian space using optimization variables like distance, time, incubation time, etc,. In this sense, one of the common variables used in optimization and on-line control strategies is the node to node distance, [2], [3], [20], [21]. In particular, this criterion is based on the flow front distance to the vent imposing that the optimal flow pattern must be vent oriented, that is, the flow front nodes should have the similar distance to the vent in each time instant.…”

Section: Previous Workmentioning

confidence: 99%

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A topological approach for the flow behaviourcharacterization in LCM processes

2009

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In this work we propose a topological approach to explain the dynamical behaviour of a LCM flow. To this end we shall use a class of homotopy maps in order to characterize an idealized mould filling process. By means this benchmark model we can construct a functional that can be used to give the reference in an on-line control system. In our previous work, [1], is proposed the use of the artificial vision technique to sense the mould as a discretized mesh that can be simulated off-line and used as a benchmark model in real-time control systems. The resulting FEM simulation represents theoretical flow behaviour. In this sense, the ideal flow behaviour must be defined based on the optimal criterion. For instance in [2], [3], the flow front in each time instant is desirable to be vent-oriented for dry spot prevention. Whatever of these optimal laws can be defined as a homotopy map where the flow front is defined as a parametric curve that moves with the flow. In order to reduce the sampling rate control system, the homotopy map is defined in a Flow Pattern Configuration Space (FPCS). This tool permits to represent the mould filling in an alternative space representation developed with the optimal criterion [5][6][7]. Using this space, the homotopy map is defined as a mono-dimensional parametric function for whatever mould dimension. Some numerical examples are given at the end of the paper.

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Manufacture of Multiscale Composites

Olawale

Okoli

2017

Nanotechnology Commercialization

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A process performance index based on gate-distance and incubation time for the optimization of gate locations in liquid composite molding processes

Cited by 18 publications

References 24 publications

Dynamics of curved interfaces

Dynamics of curved interfaces

A topological approach for the flow behaviourcharacterization in LCM processes

Manufacture of Multiscale Composites

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