Forced in‐plane flow of an epoxy resin in fibrous networks

Elsevier Vernet, N.; Ruiz, E.; Advani, S.; Alms, JB.; Aubert, M.; Barburski, M.; Barari, B.... (2014) Abstract:In this second international permeability benchmark, the in-plane permeability values of a carbon fabric were determined by 12 participants worldwide. One other participant also investigated the deformation of this fabric. The aim of this work was to obtain comparable results in order to make a step towards standardization of permeability measurements of fibrous reinforcements. The procedures used by most participants were according to the guidelines defined for this exercise after the first benchmark. Unidirectional injections in three in-plane directions of the fabric were conducted to determine the unsaturated in-plane permeability tensor. Parameters such as fiber volume fraction, injection pressure and fluid viscosity have been fixed in order to minimize sources of scatter. The comparison of the results from each participant was encouraging. The scatter between data obtained while respecting the test guidelines was close to the scatter of the setups themselves. A slightly 2 higher dispersion was observed when some parameters differed from the recommendations.Overall, a good correlation is observed between all the results of this exercise.

show abstract

“…! : unidirectional [14,15] and radial techniques [16,17]. Both methods show advantages and drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of the permeability of engineering textiles: Benchmark II

Vernet

Ruiz

Advani

et al. 2014

Composites Part A: Applied Science and Manufacturing

218

201

View full text Add to dashboard Cite

show abstract

“…A transparent mold was used to enable the monitoring of the advancing front. Other techniques based also on the observation of the moving resin front are common in the literature [43,[51][52][53][54][55][56][57][58][59]. However, transparent mold walls may not have enough rigidity to avoid deflection, which has been shown to perturbate the measured permeability values [45,48,49,54].…”

Section: Analytical Validationmentioning

confidence: 99%

“…Calhoun et al [50] presented a technique based on placing several pressure transducers at various locations inside the mold. Adams and Rebenfeld [51][52][53] developed a technique that quantifies the planar permeability using the position and shape of the advancing resin front as a function of time. A transparent mold was used to enable the monitoring of the advancing front.…”

Section: Analytical Validationmentioning

confidence: 99%

Control Volume Finite Element Methods for Flow in Porous Media: Resin Transfer Molding

Samir¹,

Echaabi²,

Hattabi³

2012

Finite Element Analysis - Applications in Mechanical Engineering

View full text Add to dashboard Cite

“…A simple analytical model that gives accurate flow front arrival times has been developed for the implementation in the MNET by Dinescu et al [11] and is named RTMSim. This analytical model also uses an iterative procedure and its core is based on the orthotropic radial in-plane flow model in elliptical coordinates developed by Adams et al [12] - [14]. The transformation of the x and y flow front coordinates to an elliptical coordinate system (ξ,η) is given by: The elliptical extent ξ of the flow front on x and y directions will be increased step by step until the value of each sensor position vector has been reached (Fig.…”

Section: The Analytical Modelmentioning

confidence: 99%

Permeability Identification of a Stereolithography Specimen Using an Inverse Method

Morren

Sol

Verleye

et al. 2007

Experimental Analysis of Nano and Engineering Materials and Structures

View full text Add to dashboard Cite

The simulation of a resin flow through a porous medium by FE-models has become a very important aspect for the design of a high-performance RTM produced composite part. The key parameters to perform RTM flow simulations are the permeability values of the fibre reinforcement. The measurement of this material parameter is still not standardized and thus many different set-ups have been proposed. This paper presents an inverse method, or a so-called mixed numerical/experimental method, for the identification of the permeability values. In this iterative inverse technique an experimental observation on a highly automated central injection rig, called "PIERS set-up", is compared with a computed observation using a numerical model that simulates exactly the same experiment. In this model the permeability values will appear as parameters which will be iteratively tuned in such a way that the computed observation matches the experiment. The inverse method combined with the PIERS set-up assures a fast and accurate identification of the permeabilities.

show abstract

Forced in‐plane flow of an epoxy resin in fibrous networks

Cited by 135 publications

References 4 publications

Experimental determination of the permeability of engineering textiles: Benchmark II

Experimental determination of the permeability of engineering textiles: Benchmark II

Control Volume Finite Element Methods for Flow in Porous Media: Resin Transfer Molding

Permeability Identification of a Stereolithography Specimen Using an Inverse Method

Contact Info

Product

Resources

About