Simulation of dynamic mold compression and resin flow for force-controlled compression resin transfer molding
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Chih-Yuan Chang
Abstract
In the present study, an improved consolidation model, with mold inertia included, is proposed to completely predict how the upper mold rapidly moves from rest to maximal velocity and then decelerates to a steady value for a constant force-controlled compression resin transfer molding (CRTM). Simulation results show that all preform compaction cases cannot apply to quasi-static consolidation theory in CRTM. For cases with a massy mold, inadequate preform resistance, and low resin viscosity, the mold inertia has a short, remarkable influence on the resin counter-force and causes a slightly slow resin progression in the early compression stage. Contrarily, the compaction of the rigid preform is applicable to the quasi-static consolidation theory. Additionally, a reasonable time increment is discussed for using the quasi steady-state approximation.
Funding source: Ministry of Science and Technology of Republic of China
Award Identifier / Grant number: MOST 106-2221-E-244-006
Funding statement: The author gratefully acknowledges the financial support of the Ministry of Science and Technology of Republic of China under Grant number: MOST 106-2221-E-244-006.
Nomenclature
- DA
area density of fiber mat (kg/m2)
- Df
density of the fiber filament (kg/m3)
- Fcomp
compression force (N)
- Ffiber
force exerted by preform (N)
- Finertia
inertial force of mobile mold (N)
- Fresin
force exerted by resin pressure (N)
- h
preform thickness (m)
- ḣ
compression speed (m/s)
- Kx, Ky
permeability of the preform in x and y directions (m2)
- Lf
length of the saturated preform (m)
- M
mass of mobile upper mold (kg)
- N
number of fiber mats
- nx, ny
directions of the outward unit normal to the element boundary
- P
pressure (Pa)
- Pinj
injection pressure (Pa)
- u, v
velocity components in x, y direction (m/s)
- uf
front velocity (m/s)
- x, y
coordinate components in the physical domain (m)
- Greek symbols
- Δt
time increment (s)
- ϕ
porosity of the preform
- μ
resin viscosity (Pa-s)
- σ
stress of compressed preform (N/m2)
- Ψ
shape function
- Γ
coordinate along the boundary
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© 2019 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
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- Impact of graphene/graphene oxide on the mechanical properties of cellulose acetate membrane and promising natural seawater desalination
- Surface damage characterization of photodegraded low-density polyethylene by means of friction measurements
- Morphology and electrical properties of polypropylene/polyamide 6/glass fiber composites with low carbon black loading
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- Preparation and evaluation of a stable and sustained release of lansoprazole-loaded poly(d,l-lactide-co-glycolide) polymeric nanoparticles
- Engineering and processing
- Influence of chemical postprocessing on mechanical properties of laser-sintered polyamide 12 parts
- Manufacture and mechanical properties of sandwich structure-battery composites
- Simulation of dynamic mold compression and resin flow for force-controlled compression resin transfer molding
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Artikel in diesem Heft
- Frontmatter
- Material properties
- Pyrolysis of polypropylene over zeolite mordenite ammonium: kinetics and products distribution
- Impact of graphene/graphene oxide on the mechanical properties of cellulose acetate membrane and promising natural seawater desalination
- Surface damage characterization of photodegraded low-density polyethylene by means of friction measurements
- Morphology and electrical properties of polypropylene/polyamide 6/glass fiber composites with low carbon black loading
- Preparation and assembly
- Preparation and evaluation of a stable and sustained release of lansoprazole-loaded poly(d,l-lactide-co-glycolide) polymeric nanoparticles
- Engineering and processing
- Influence of chemical postprocessing on mechanical properties of laser-sintered polyamide 12 parts
- Manufacture and mechanical properties of sandwich structure-battery composites
- Simulation of dynamic mold compression and resin flow for force-controlled compression resin transfer molding
- A mathematical analysis for the blade coating process of Oldroyd 4-constant fluid
