Thickness Variation Reduction For Vartm Process

Thickness Variation Reduction For Vartm Process

by Jing Li
     
 

Vacuum-assisted resin transfer molding (VARTM), one

of a commonly used composite manufacturing

processes, is becoming more popular. To optimize the

manufacturing process, reduce costs, and maintain

consistent part quality, knowledge of mold filling,

especially flow through thickness direction is

required. This work investigates the mechanism of

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Overview

Vacuum-assisted resin transfer molding (VARTM), one

of a commonly used composite manufacturing

processes, is becoming more popular. To optimize the

manufacturing process, reduce costs, and maintain

consistent part quality, knowledge of mold filling,

especially flow through thickness direction is

required. This work investigates the mechanism of

the thickness variation dynamic change during the

infusion and curing/relaxing processes. A numerical

model is developed to track the thickness change of

the bagging film free surface. In addition, this

work analyzes the sources of the uncertainties and

quantifies the magnitudes of the uncertainties by

error propagation theory to characterize the

statistical properties of the permeability values.

Factors related to the part thickness variation are identified with design of experiments method and a

better tooling design is obtained by configuring

the different flow media. The parameter uncertainty

that leads to part-to-part thickness variation is also investigated and a stochastic process

simulation coupled with optimization is effectively

demonstrated.

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Product Details

ISBN-13:
9783639128710
Publisher:
VDM Verlag
Publication date:
02/26/2009
Pages:
144
Product dimensions:
0.34(w) x 6.00(h) x 9.00(d)

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