Fabrication of T-Shaped Structural Composite through Resin Transfer Molding

Young, Wen-Bin; Chuang, Min-Te

doi:10.1177/002199839502901606

Cited by 19 publications

(3 citation statements)

References 28 publications

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“…The material and process parameters in LCM manufacturing exhibit variations (21,22). Most commonly, the preform permeability can vary along the edges due to imperfect fit and non-repeatable placement.…”

Section: Sensing and Controlmentioning

confidence: 99%

Desirable features in mold filling simulations for Liquid Composite Molding processes

2004

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Numerical simulations of the mold filling process in various Liquid Composite Molding (LCM) techniques, in which the fiber reinforcements represent the porous media and the polymeric resin is the impregnating fluid, have been successfully utilized for over a decade now, but they continue to be under dynamic development. Some of the recent applications are the increased emphasis on design optimization, control of the impregnation process and the rapid introduction of new LCM techniques such as the Vacuum Assisted Resin Transfer Molding (VARTM). This paper describes the requirements that these new applications demand on the implementation of such numerical simulation for modeling mold filling in LCM processes, namely Resin Transfer molding (RTM) and VARTM. Liquid Injection Molding Simulation (LIMS) developed at the University of Delaware, which can simulate the flow in such processes, has been modified to encompass these features. It addresses practical issues concerning modeling the part geometry, such as the proper choice of one-, two-and three-dimensional elements and their effective combinations. It also describes the simulation of non-trivial boundary conditions, placement of sensors and allowing for resin injection control using the functions built into the simulation program and the embedded scripting language. Several examples are presented to highlight the importance of its flexibility. The paper also addresses some VARTM specific issues, such as the modeling of distribution media, dimensional change during filling and fiber tow saturation. Polym. Compos. 25:355-367, 2004.

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Section: Sensing and Controlmentioning

confidence: 99%

Desirable features in mold filling simulations for Liquid Composite Molding processes

2004

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“…Young and Chuang [8] investigated T-joints fabricated using resin transfer molding and transverse stitching of the flange at an offset distance form the web-to-flange interface. T-joint ultimate failure under tension loading was shown to be improved using transverse stitching.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of composite T-joints under tensile and shear loading

Stickler¹,

Ramulu²

2006

Advanced Composite Materials

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An experimental study of a new type of composite T-joint with transverse stitching was conducted under tensile and shear loading. Fixtures were designed to load the T-joint specimens under simple support and fixed support boundary conditions, respectively. During experimentation, load-displacement and strain-load measurements were recorded and post-failure analysis was accomplished on failed specimens using optical microscopy. T-joint behavior under simple-support tension boundary conditions was shown to be linear up to initial failure. Specimens failed initially due to matrix cracking at the fillet region of the web-to-flange interface. Onset of ultimate failure was attributed to fiber insertion bridging leading to insertion breakage and pullout. The mechanical behavior under an applied shear load was marked by nearly linear behavior up to ultimate failure. Specimens fail by interfacial matrix cracking at the web-to-flange interface leading to T-joint catastrophic failure with complete separation of the web and flange.

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“…Finite element analysis (FEA) was performed to predict pull-off strength and fracture mechanics was used to predict delimitation failure. T-joints with transverse stitching using the RTM process and Ciba-Geigy epoxy resin were evaluated by Young et al [7]. They showed that transverse stitching along the rib at an offset distance from the web improved the pull-off strength of T-joints.…”

Section: Introductionmentioning

confidence: 99%

Transverse Stitched T-Joints in Bending with PR520 Resin: Initial Results

Stickler¹,

West

2001

Journal of Reinforced Plastics and Composites

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An experimental investigation was undertaken to evaluate the bending strength of transversely stitched T-joints using fiber insertion as the primary load transfer mechanism and using resin transfer molding with PR520 toughened epoxy resin. Tests were conducted to determine the ultimate bending strength of two joint configurations and fractographic examination was performed to determine joint failure mechanisms. This study shows that increasing the web thickness and the subsequent number of rows of stitching has the effect of increasing the initial and maximum bending strength of the T-joint design. As indicated by the fractographic examination, initial joint failure occurs by matrix cracking initiating at the resin rich corner fillet and propagates inward toward the transverse stitching; and ultimate joint failure occurs by fiber breakage and/or fiber pullout.

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Fabrication of T-Shaped Structural Composite through Resin Transfer Molding

Cited by 19 publications

References 28 publications

Desirable features in mold filling simulations for Liquid Composite Molding processes

Desirable features in mold filling simulations for Liquid Composite Molding processes

Experimental study of composite T-joints under tensile and shear loading

Transverse Stitched T-Joints in Bending with PR520 Resin: Initial Results

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