Influence of the Vacuum Bag Process on The Strength of Laminate Composite

Hidayat, Syarif

doi:10.1109/icast1.2018.8751599

Cited by 1 publication

(1 citation statement)

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“…They are therefore important materials in lightweight design and are used in a wide range of applications, from the automotive industry [2] to aviation [3] or from plant design to the transportation sector [4]. The range of materials belonging to this material class extends from short-fibre-or long-fibre-reinforced thermoplastics produced by injection moulding for large-scale production [5,6] to hand-laminated individual parts made from continuous fibre-reinforced laminates [7]. However, what all of them have in common is that the material properties are significantly influenced by the manufacturing process.…”

Section: Introduction 1motivationmentioning

confidence: 99%

Enhancing the Design of Experiments on the Fatigue Life Characterisation of Fibre-Reinforced Plastics by Incorporating Artificial Neural Networks

Witzgall,

Ashhab,

Wartzack

2024

Materials

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Fatigue life testing is a complex and costly matter, especially in the case of fibre-reinforced thermoplastics, where other parameters in addition to force alone must be taken into account. The number of tests required therefore increases significantly, especially if the influence of different fibre orientations is to be taken into account. It is therefore important to gain the greatest possible amount of knowledge from the limited number of available tests. In order to achieve this, this study aims to utilise adaptive sampling, which is used in numerous areas of computational engineering, for the design of experiments on fatigue life testing. Artificial neural networks (ANNs) are therefore trained on data for the short-fibre-reinforced material PBT GF30, and their areas of greatest model uncertainty are queried. This was undertaken with ANNs from various numbers of hidden layers, which were analysed for their performance. The ideal case turned out to be four hidden layers, for which a squared error as small as 1 × 10−3 was recorded. Locally resolved, the ANN was used to identify the region of greatest uncertainty for samples of vertical orientation and small numbers of cycles. With information such as this, additional data can be obtained in such uncertain regions in order to improve the model prediction—almost halving the recorded error to only 0.55 × 10−3. In this way, a model of comparable value can be found with less experimental effort, or a model of better quality can be set up with the same experimental effort.

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