Textile composite structural analysis taking into account the forming process

Aridhi, Abderrahmen; Arfaoui, Makrem; Mabrouki, Tarek; Naouar, Naïm; Denis, Yvan; Zarroug, Malek; Boisse, Philippe

doi:10.1016/j.compositesb.2019.02.047

Cited by 39 publications

(18 citation statements)

References 66 publications

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“…As a forming benchmark example owing to its double-curved structure, the double dome test enables comparative investigations of the existing models both for continuous dry and pre-impregnated reinforcements at room temperature or high temperatures [14,93,94,95,96,97,98]. It is also conducted to investigate various relevant aspects such as the effect of fiber orientations due to the process on the in-service behavior properties of the composite [96].…”

Section: Fe Simulations Of Thermoformingmentioning

confidence: 99%

Consolidation Modeling during Thermoforming of Thermoplastic Composite Prepregs

2019

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This article describes the modeling of the compaction/consolidation behavior of thermoplastic composite prepregs during the thermoforming process. The proposed model is principally based on a generalized Maxwell approach. Within a hyperelastic framework, viscoelasticity is introduced for the compaction mode in addition to the in-plane shearing mode by taking into account the influence of the resin and its flow during consolidation. To reveal the evolution of the consolidation level, which reflects the number of voids in the composite, an intimate contact model was used during the process. The model was characterized by a compaction test at a high temperature. It was implemented into a recently developed prismatic solid-shell finite element. The analysis of the thermoforming of a double dome demonstrated the relevance of the consolidation computation in determining the process parameters leading to a composite part free of voids.

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Section: Fe Simulations Of Thermoformingmentioning

confidence: 99%

Consolidation Modeling during Thermoforming of Thermoplastic Composite Prepregs

2019

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“…The basic mechanical properties of the composite, such as stiffness and strength, therefore can strongly change due to the draping. This is a topic that's been studied a lot, especially in recent years [4,5,6,7,8,9,10,11,12]. These analyses are included in integrated composite part design software (see, for example [13,14,15]).…”

Section: Introductionmentioning

confidence: 99%

Identification and validation of a hyperelastic model for self-reinforced polypropylene draping

et al. 2020

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Self-reinforced polypropylene (SRPP) is a composite in which the reinforcement and the matrix consist of the same polymer, namely polypropylene. The present work focuses on the development and experimental validation of an FE model for thermoforming of SRPP. The constitutive model of SRPP sheet is based on the Boisse-Charmetant hyperelastic law. Material properties required to fit the model were obtained from the tensile and picture frame shear tests performed at forming temperatures and bending test of a non-consolidated fabric at room temperature. The model is validated in comparison with the experimental draping data, with special attention to parameters and patterns of wrinkles. Samples, preheated to a surface temperature of 170-175°C, were deformed up to 1-4 cm heights using a hemispherical mould with a 4.5 cm diameter. Overall, good qualitative correlation between experimental and modelling results is observed, which justifies use of the proposed model with the experimentally identified parameters for prediction of SRPP draping and subsequent analysis of the mechanical response of the consolidated part to loading.

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“…These advancements make it possible to predict the state of the composite after manufacture in particular the orientation of the fibres and certain defects such as wrinkles [ 12 , 13 , 14 ]. Some studies have been conducted on the influence of the manufacturing processes on the mechanical characteristics of composites [ 15 , 16 , 17 ]. The influence of defects and in particular of wrinkles and waviness on the mechanical characteristics of composites were analysed in [ 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Textile Composite Damage Analysis Taking into Account the Forming Process

et al. 2020

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The internal structure of composite materials is modified during manufacturing. The formation of woven prepregs or dry preforms changes the angle between the warp and weft yarns. The damage behaviour of the consolidated composite is modified by these changes of angle. It is important when designing a composite part to consider this modification when calculating the damage in order to achieve a correct dimensioning. In this paper, a damage calculation approach of the consolidated textile composite that takes into account the change in orientation of the yarns due to forming is proposed. The angles after forming are determined by a simulation of the draping based on a hypoelastic behaviour of the woven fabric reinforcement. Two orthogonal frames based on the warp and weft directions of the textile reinforcement are used for the objective integration of stresses. Damage analysis of the cured woven composite with non-perpendicular warp and weft directions is achieved by replacing it with two equivalent Unidirectional (UD) plies representing the yarn directions. For each ply, a model based on Continuum Damage Mechanics (CDM) describes the progressive damage. Two examples are presented, a bias extension specimen and the hemispherical forming coupon. In both cases, the angles between the warp and weft yarns are changed. It is shown that the damage calculated by taking into account these angle changes is greatly modified.

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Textile composite structural analysis taking into account the forming process

Cited by 39 publications

References 66 publications

Consolidation Modeling during Thermoforming of Thermoplastic Composite Prepregs

Consolidation Modeling during Thermoforming of Thermoplastic Composite Prepregs

Identification and validation of a hyperelastic model for self-reinforced polypropylene draping

Textile Composite Damage Analysis Taking into Account the Forming Process

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