A multiscale investigation based on variance analysis for hand lay-up composite manufacturing

Ávila, Antônio F.; Morais, David T.S.

doi:10.1016/j.compscitech.2004.05.021

Cited by 28 publications

(11 citation statements)

References 19 publications

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“…Woven roving fibres were determined to be the finest materials in the context of the hand lay-up method [16]. Moreover, the intertwining fibre structural design prevents fibre failure modes, such as micro buckling and gross delamination [17] [18]. The fibre reinforcement materials modelled in this work were E-glass woven fabric (EWF400-1000), carbon woven fabric (EC3K) and chopped glass fibre (CHOPPED STRAND 3075).…”

Section: Methodsmentioning

confidence: 99%

“…Specimens were fabricated using the hand layup technique. This is a traditional composite processing technique [16] [17] that involves manually positioning the reinforcement mat or woven roving in an open mould and pouring, brushing, or spraying the resin onto the composites. The samples were tested at various stress levels low to high as per ASTM, to understand the fatigue behaviour.…”

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confidence: 99%

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Composite Failure Modes at High Cyclic Fatigue Life Evaluation

Al-Qrimli¹,

Al-Dulaimi²,

Ameen³

2020

IJAME

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Fibre reinforced polymer composite have been utilised in applications that require high strength-to-weight ratio and durability like automotive and spacecraft components. The literatures has indicated that there is a gap of knowledge in fatigue failure mechanism, and reliable prediction of fatigue life for glass and carbon fibre laminates. This study is to address experimentally the stress level dominated the composite failure mode and how to avoid stress concentration in fatigue design. In addition, it contributes to the scientific knowledge and to further increase the understanding the fatigue behaviour of composite materials structures. To accomplish this investigation goals, three types of materials were fabricated and tested; glass/epoxy, carbon/epoxy, and chopped glass/epoxy. Traditional hand layup technique for composite processing was used to fabricate the composite specimens. It involves manually positioning the reinforcement woven roving in an open mould and pouring, brushing, the resin onto the composites. This study details the experimental results of the ultimate tensile strength and high cycle fatigue, with a stress ratio of 0.1, using ASTM. Results showed that carbon fibre composite had the highest ultimate tensile strength. The power curves conducted from this paper were used to estimate the number of cycles which the material can endure.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Composite Failure Modes at High Cyclic Fatigue Life Evaluation

Al-Qrimli¹,

Al-Dulaimi²,

Ameen³

2020

IJAME

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“…The formation of residual stresses is mainly dependent on the mechanical and thermo-mechanical properties of the constituents [41,64]. As mentioned in section 6.1, these properties are strongly influenced by the fibre volume fraction, implying that fibre volume fraction variations can introduce considerable scatter to the formation of residual stresses [41,65]. Regions with locally lower fibre volume fraction are more prone to geometrical distortions and defects due to process-induced stresses [9,65].…”

Section: Residual Stresses-shape Distortionmentioning

confidence: 99%

“…As mentioned in section 6.1, these properties are strongly influenced by the fibre volume fraction, implying that fibre volume fraction variations can introduce considerable scatter to the formation of residual stresses [41,65]. Regions with locally lower fibre volume fraction are more prone to geometrical distortions and defects due to process-induced stresses [9,65]. A variation in the order of 6% in fibre volume fraction can lead to 5% variation in the spring-in angle [65].…”

Section: Residual Stresses-shape Distortionmentioning

confidence: 99%

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Uncertainty in the manufacturing of fibrous thermosetting composites: A review

Mesogitis

Skordos

Long

2014

Composites Part A: Applied Science and Manufacturing

164

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Composites manufacturing involves many sources of uncertainty associated with material properties variation and boundary conditions variability. In this study, experimental and numerical results concerning the statistical characterization and the influence of inputs variability on the main steps of composites manufacturing including process-induced defects are presented and analysed. Each of the steps of composite manufacturing introduces variability to the subsequent processes, creating strong interdependencies between the process parameters and properties of the final part. The development and implementation of stochastic simulation tools is imperative to quantify process output variabilities and develop optimal process designs in composites manufacturing.

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Processing Polymer Matrix Composites

Leong

2012

Wiley Encyclopedia of Composites

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There are numerous methods for fabricating polymer matrix composite components. This article outlines some of the most common and popular ones that cover processes such as autoclave, liquid, injection and compression molding, as well as filament winding and pultrusion. Variants of these well‐established processes are also covered, highlighting key attributes brought about by new innovations to the original processes. Where appropriate, examples of composite components that are typically produced by the respective processes are also mentioned. The key composite processing variables are then discussed, and where relevant, reference is made to particular processes described earlier in the article. The variables, which include fiber form and architecture and resin type, as well as flow and cure behavior, and tooling are described with respect to their control and monitoring; how they affect the properties of the composite laminate, in relation to void content and fiber loading and directionality, after they have been processed is also discussed.

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A multiscale investigation based on variance analysis for hand lay-up composite manufacturing

Cited by 28 publications

References 19 publications

Composite Failure Modes at High Cyclic Fatigue Life Evaluation

Composite Failure Modes at High Cyclic Fatigue Life Evaluation

Uncertainty in the manufacturing of fibrous thermosetting composites: A review

Processing Polymer Matrix Composites

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