NUMERICAL PREDICTION FOR PERMEABILITY OF WOVEN FABRICSNUMERICAL PREDICTION FOR PERMEABILITY OF WOVEN FABRICSNUMERICAL PREDICTION FOR PERMEABILITY OF WOVEN FABRICS

G Specht (Intern) S Advani P SimacekG. Specht (Intern), S. Advani, P. Simacek

University of Delaware . Center for Composite Materials . Department of Mechanical EngineeringUniversity of Delaware . Center for Composite Materials . Department of Mechanical Engineering

GO SO O GGOAL FLUENTSOLID MODELING

• V Systems Composites sends multiple files• The purpose of this research is to predict the • V-Systems Composites sends multiple files • Fluent is used to simulate the resin flowing through• The purpose of this research is to predict the bili f l f b i diff fib containing models of fabrics to be analyzed.

Fluent is used to simulate the resin flowing through the meshes and then reports the mass flow ratespermeability of complex fabrics at different fiber containing models of fabrics to be analyzed.

• The files are imported and manipulated so eachthe meshes and then reports the mass flow rates.p y p

volume fractions • The files are imported and manipulated so each • Settings such as viscosity, periodicity, andvolume fractions. wall is identical to its parallel wall. Settings such as viscosity, periodicity, and pressure gradient must be altered for each test• This can be accomplished by modeling resin flow

a s de t ca to ts pa a e a• This makes it possible to see the change in long

pressure gradient must be altered for each test.This can be accomplished by modeling resin flow through geometric model of reinforcement

• This makes it possible to see the change in long • The pressure gradient is due to the resistance ofthrough geometric model of reinforcement. distances and only modeling small units.The pressure gradient is due to the resistance of the liquid flowing through the mesh• In computer simulations one can modify fiber volume

y g• Then they are turned into meshes and are

the liquid flowing through the mesh.In computer simulations one can modify fiber volume f ti f b i t t ti t th ff t

• Then they are turned into meshes and are fraction or fabric geometry to estimate the effects on exported into Fluent.fabric permeability

pfabric permeability.

Solid Model MeshSolid Model Mesh

RESULTS FUTURE PLANSCALCULATIONS RESULTS FUTURE PLANSCALCULATIONS ACKNOWLEDGEMENTSACKNOWLEDGEMENTSVelocity of Resin Flow

• With the mass flow rate theVelocity of Resin Flow

Thi k i t d b th A• With the mass flow rate the

This work is supported by the Army permeability can be found.Research Laboratory through the Composite

p y• Next thing to do is take new meshes Materials Research program.Next thing to do is take new meshes

d th i l tip g

This work is supported by the Armyand run the simulations. This work is supported by the Army Research Laboratory through the Composite• Then make actual models of the Research Laboratory through the Composite

Materials Technology programThen make actual models of the f b i d th t t Materials Technology program.

This ork is s pported b the Office of Na alfabrics and compare the test

This work is supported by the Office of Naval R h th h th Ad d M t i lpermeability against the simulated Research through the Advanced Materials permeability against the simulated

permeabilit Intelligent Processing Center.permeability. g gThis work is supported by V-Systems

Fib l Kpp y y

Composites.Fiber tow layers K Composites.1 6 94E‐121 6.94E 12

2 5.18E‐13

3 3 01E 223 3.01E‐22

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