CN105954169A - Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric - Google Patents

Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric Download PDF

Info

Publication number
CN105954169A
CN105954169A CN201610247134.2A CN201610247134A CN105954169A CN 105954169 A CN105954169 A CN 105954169A CN 201610247134 A CN201610247134 A CN 201610247134A CN 105954169 A CN105954169 A CN 105954169A
Authority
CN
China
Prior art keywords
fabric
liquid
thickness
steady
measuring
Prior art date
Application number
CN201610247134.2A
Other languages
Chinese (zh)
Inventor
蒋建军
苏洋
周林超
郭强
徐楚朦
姚旭明
Original Assignee
西北工业大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 西北工业大学 filed Critical 西北工业大学
Priority to CN201610247134.2A priority Critical patent/CN105954169A/en
Publication of CN105954169A publication Critical patent/CN105954169A/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082Investigating permeability by forcing a fluid through a sample
    • G01N15/0826Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change

Abstract

The invention relates to a measuring method and measuring system for the thickness-direction steady-state permeation rate of a fiber fabric and discloses the method for measuring the thickness-direction steady-state permeation rate of the fiber fabric by using the system. The system comprises an air compressor, a pressure regulating valve, a liquid storage tank, a valve, a pressure gauge, a plastic pipe and a die, wherein the die is composed of an external metal framework, a tubular tank, a porous sieve plate, a thickness adjusting cushion block, etc. In the process of an experiment, the total thickness of the fiber fabric after die locking is controlled by adjusting a nut; different injection pressures are obtained by adjusting the pressure regulating valve; the air compressor provides an injection pressure of 0.1 to 0.2 MPa for measurement of the permeation rate of the fiber fabric; and the thickness-direction permeation rate of the fiber fabric is calculated by measuring the mass of liquid flowing out from the totally-infiltrated fiber fabric in a certain period of time. Thus, the thickness-direction steady-state permeation rates of fiber fabrics with different thicknesses at different pressures can be measured.

Description

The thick measuring method to steady-state permeation rate of a kind of fabric and the system of measurement
Technical field
The invention belongs to resin base fiber reinforced composite material liquid condition shaping technical field, be specifically related to a kind of fabric Thick measuring method to steady-state permeation rate and the system of measurement, and use this systematic survey fabric thick to steady-state permeation The method of rate.
Background technology
Permeability is to be characterized in fluid under pressure effect to flow in porous media the parameter of complexity, thick to permeability It is that reflection fluid is by the parameter of suffered resistance situation, permeability the biggest expression porous media during fabric thickness direction The flow resistance of convection cell is the least.RTM injection moulding or vacuum bag technique is used to prepare the process of polymer matrix composites In, the permeability of preform is prediction composite liquid condition shaping technique mold filling process, carries out Design of Dies and technique The important parameter optimized, affects one of key factor that under vacuum action, resin flowing and gas are discharged, thus necessarily The Forming Quality of composite product is affected in degree.The mold filling process of current most of liquid condition shaping technique and excellent Change design and be only limitted to face intrinsic permeability, and for manufacturing the composite of complicated shape and structure, only obtain face endosmosis Rate is far from enough meeting actual requirement thoroughly.Along with the application of composite material structural member is more and more extensive, preform The variation of structure, fabric is thick more and more significant to measurement apparatus and the implementation method of permeability.
In existing fabric thickness direction permeability test device, patent 200710099160.6 " fiber laying In face and thickness direction permeability test device and saturated permeability method of testing " and patent 201210301604.0 " Plant fabric thickness direction permeability test device and method of testing " the identical number of plies under different injection pressure can not be tested Under the permeability of fabric and uniform pressure different number of plies fabrics permeability and also apparatus structure is complicated, one-tenth This height, operation complexity.
Summary of the invention
Solve the technical problem that
In place of the deficiencies in the prior art, it is thick to the measurement of steady-state permeation rate that the present invention proposes a kind of fabric Method and the system of measurement, and use this systematic survey fabric thick to the method for steady-state permeation rate.
Technical scheme
A kind of fabric is thick to the measuring method of steady-state permeation rate, it is characterised in that:
Step 1: with liquid complete wetting fabric;
Step 2: wetting fibre fabric thickness to apply 0.1~0.2MPa pressure P0
Step 3: calculate fabric thick to permeabilityThe quality that in wherein m is the t time, liquid flows out, S is that liquid flows through cross-sectional area, and L is fabric thickness, and K is permeability, P0For the pressure applied, μ is liquid The viscosity of body, ρ is the density of liquid.
A kind of described fabric thickness that realizes is to the system of the measuring method of steady-state permeation rate, it is characterised in that include air Compressor 1, pressure-regulating valve 2, fluid reservoir 3, valve 4, Pressure gauge 5, mould 6 and balance 7;Air compressor 1 connects fluid reservoir 3 by pressure-regulating valve 2 pipeline, and fluid reservoir 3 is entered by valve 4 pipeline connecting mold 6 lower end Liquid mouth, the liquid outlet tube outlet of mould 6 upper end is placed in the scale pan on balance 7;Described mould 6 includes liquid outlet pipe Road 12,14, two pieces of porous sieve plates 15 of tubular tank and piston rod 16;Two pieces match many with tubular tank 14 internal diameter Hole sizer plate 15 is positioned at tubular tank 14, and the lower end of tubular tank 14 is provided with inlet, and upper end is provided with piston rod 16, side Wall is provided with liquid outlet pipeline 12, and is positioned at the upper end of porous sieve plate 15.
The upper end of described piston rod 16 adjusting nut 10 is provided with the thickness adjusted cushion block 9 controlling fabric thickness.
A kind of to utilize described system to carry out fabric thick to the measuring method of steady-state permeation rate, it is characterised in that step is such as Under:
Step 1: by die surface wiped clean, dry, then uses two pieces of porous sieve plates to clamp tested fabric Rear one is placed in tubular tank 14, and makes liquid outlet pipeline 12 be positioned at the upper end of porous sieve plate;Use on piston rod Mat thickness regulation cushion block adjusting nut controls fabric thickness;
Step 2: open air compressor, opens valve, is noted in tubular tank by the inlet of mould 6 lower end Entering liquid, liquid passes porous sieve plate wetting fibre fabric, when the liquid outlet pipeline 12 of tubular tank has liquid to flow out, Think liquid complete wetting fabric;
Step 3: regulation pressure valve, after reaching required injection pressure, goes out from tubular tank in weighing the t time by balance Quality m of the liquid that mouth flows out, according toSolving fabric thick to steady-state permeation rate K, in formula, m is one Liquid in t of fixing time flows out quality, and s is that liquid flows through cross-sectional area, and L is fabric thickness, P0For injection pressure Power, μ is the viscosity of liquid, and ρ is the density of liquid.
Beneficial effect
The thick measuring method to steady-state permeation rate of a kind of fabric that the present invention proposes and the system of measurement, and use should Systematic survey fabric is thick to the method for steady-state permeation rate.Device includes air compressor, pressure-regulating valve, liquid storage Tank, valve, Pressure gauge, plastic tube, mould, wherein mould is by external metallization framework, tubular tank, porous sieve plate, Thickness adjusted cushion blocks etc. are constituted, the internal a diameter of 50mm of die cavity.In experimentation, the gross thickness of fabric after matched moulds Control realized by adjusting nut.Different injection pressures is obtained by regulation pressure-regulating valve.Compressed by air Machine provides the injection pressure of 0.1~0.2MPa to fabric permeability survey, by the fiber after measurement complete wetting The liquid quality that fabric flows out within a certain period of time is to calculate the thickness of fabric to permeability.Thus realize different pressures Under, different-thickness fabric is thick to the measurement of steady-state permeation rate.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of measurement apparatus
Fig. 2 is mould 6 schematic diagram
Wherein: 1, air compressor 2, pressure-regulating valve 3, fluid reservoir 4, valve 5, Pressure gauge 6, Mould 7, balance 8, camera 9, thickness adjusted cushion block 10, adjusting nut 11, external metallization framework 12, Plastic tube 13, fabric 14, tubular tank 15, porous sieve plate 16, piston rod.
Detailed description of the invention
In conjunction with embodiment, accompanying drawing, the invention will be further described:
, the inventive method, it is therefore intended that be mainly used in measuring the permeability of identical number of plies fabric under different injection pressure And the permeability of different number of plies fabrics under uniform pressure.This measuring method passes through air compressor to fabric Permeability survey provides pressure, the liquid quality flowed out within a certain period of time by the fabric after measuring complete wetting Estimate the permeability of fabric.
Estimation fabric is thick to the formula of permeability
K = m μ L ρtSP 0
In wherein m is certain time t, liquid flows out quality, and s is that liquid flows through cross-sectional area, and L is that fabric is thick Degree, K is permeability, P0For injection pressure, μ is the viscosity of liquid, and ρ is the density of liquid.
Measurement apparatus includes air compressor, pressure-regulating valve, fluid reservoir, valve, Pressure gauge, plastic tube, mould, Wherein mould is made up of external metallization framework, tubular tank, porous sieve plate, thickness adjusted cushion block etc., internal die cavity diameter For 50mm.In experimentation, after matched moulds, the control of the gross thickness of fabric is realized by adjusting nut.By regulation Pressure-regulating valve obtains different injection pressures.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: given by air compressor Fabric permeability survey provides the pressure of 0.1~0.2MPa, by the fabric after measurement complete wetting one Fix time the liquid quality of interior outflow to calculate the permeability of fabric.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: regulated by regulation pressure Valve, can measure fabric under different pressures thick to steady-state permeation rate.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: by mat thickness spacer It is thick to the measurement of steady-state permeation rate that block adjusting nut realize different-thickness fabric.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: the mold filling mistake of fabric Journey is carried out in tubular tank, and the good air-tightness of this device ensure that the accuracy of experimental result.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: this test device versatility By force, can measure different materials, different geometric configuration fabrics are thick to steady-state permeation rate.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: porous sieve plate is that band is some The corrosion resistant plate of circular hole, beneficially synchronised fluid, evenly flow into outflow fabric, and ensure the flat of fabric Whole property, increases the accuracy of thickness direction permeability test.
Described a kind of fabric is to the measuring method of steady-state permeation rate, it is characterised in that: comprise the following steps:
Step 1: open tubular tank, with acetone equal solvent by die surface wiped clean, dries;Divide in tubular tank Do not put into porous sieve plate, fabric, porous sieve plate, by the regulation cushion block of mat thickness on the piston rod adjusting nut Realize fabric THICKNESS CONTROL.
Step 2: open air compressor, opens valve, injects liquid, make the liquid in tubular tank in tubular tank Body wetting fibre fabric, when the outlet of tubular tank has liquid to flow out, it is believed that liquid complete wetting fabric.
Step 3: after liquid complete wetting fabric, regulates pressure valve, after reaching required injection pressure, passes through Quality m of the liquid that balance flows out from the outlet of tubular tank in weighing the t time, by formulaSolve fabric Thick to steady-state permeation rate K, in formula, m is certain time t, liquid flows out quality, and s is that liquid flows through cross-sectional area, L is fabric thickness, P0For injection pressure, μ is the viscosity of liquid, and ρ is the density of liquid.
Referring to the drawings, the fabric in the present embodiment thick to the measurement apparatus of steady-state permeation rate include air compressor 1, Pressure-regulating valve 2, fluid reservoir 3, valve 4, Pressure gauge 5, mould 6, wherein mould 6 by thickness adjusted cushion block 9, Adjusting nut 10, external metallization framework 11, tubular tank 14, porous sieve plate 15 are constituted, the internal die cavity diameter of tubular tank For 50mm.Tubular tank 14 is fixed on external metallization framework 11, has an adjusting nut 10 on piston rod 16 top, By the regulation cushion block of mat thickness between adjusting nut 10 and external metallization framework 11 and screw adjusting nut and realize to be measured The thickness adjusted of fabric.
In experimentation, after matched moulds, the control of the gross thickness of fabric is realized by adjusting nut.By regulation pressure Regulation valve obtains different injection pressures.Air compressor is needed to provide pressure owing to measuring the device of fabric permeability Power, so device needs to be attached with screw thread and raw material band in connection procedure.This device uses pointer-type pressure Table, so add valve in installation process, in order to saves the time of regulation pressure.Test fluid is in compressed air Promotion under, from mold bottom center inject, sidewall flow out.Balance convection cell is utilized to weigh, taking the photograph of top The change of camera recording liquid weight.The body in the unit interval can be solved according to the change of fluid mass in certain time Long-pending flow Q.
The method of testing of the fabric thickness direction steady-state permeation rate of the present embodiment, comprises the steps:
Step 1: open tubular tank, with acetone equal solvent by die surface wiped clean, dries;Divide in tubular tank Do not put into porous sieve plate, fabric, porous sieve plate, by the regulation cushion block of mat thickness on the piston rod adjusting nut Realize fabric THICKNESS CONTROL.
Step 2: open air compressor, opens valve, injects liquid, make the liquid in tubular tank in tubular tank Body wetting fibre fabric, when the outlet of tubular tank has liquid to flow out, it is believed that liquid complete wetting fabric.
Step 3: after liquid complete wetting fibre bundle, regulates pressure valve, after reaching required injection pressure, by sky Flat quality m weighing the t time interior liquid flowed out from the outlet of tubular tank, by formulaSolve fabric thick To steady-state permeation rate K, in formula, m is certain time t, liquid flows out quality, and s is that liquid flows through cross-sectional area, L For fabric thickness, P0For injection pressure, μ is the viscosity of liquid, and ρ is the density of liquid.
The present invention is compared to existing technology, it is achieved that under different pressures, and different-thickness fabric is thick to steady-state permeation rate Measure.It is simple that it measures process, and workable, experimental data is reliable.

Claims (4)

1. a fabric is thick to the measuring method of steady-state permeation rate, it is characterised in that:
Step 1: with liquid complete wetting fabric;
Step 2: wetting fibre fabric thickness to apply 0.1~0.2MPa pressure P0
Step 3: calculate fabric thick to permeabilityThe quality that in wherein m is the t time, liquid flows out, S is that liquid flows through cross-sectional area, and L is fabric thickness, and K is permeability, P0For the pressure applied, μ is liquid The viscosity of body, ρ is the density of liquid.
2. realizing fabric described in claim 1 thick to a system for the measuring method of steady-state permeation rate, its feature exists In include air compressor (1), pressure-regulating valve (2), fluid reservoir (3), valve (4), Pressure gauge (5), Mould (6) and balance (7);Air compressor (1) connects fluid reservoir (3) by pressure-regulating valve (2) pipeline, The fluid reservoir (3) inlet by valve (4) pipeline connecting mold (6) lower end, mould (6) upper end Liquid outlet tube outlet is placed in the scale pan on balance (7);Described mould (6) include liquid outlet pipeline (12), Tubular tank (14), two pieces of porous sieve plates (15) and piston rod (16);Two pieces with tubular tank (14) internal diameter phase The porous sieve plate (15) coincideing is positioned at tubular tank (14), and the lower end of tubular tank (14) is provided with inlet, Upper end is provided with piston rod (16), and sidewall is provided with liquid outlet pipeline (12), and is positioned at the upper of porous sieve plate (15) End.
The most according to claim 2, fabric is thick to the system of the measuring method of steady-state permeation rate, it is characterised in that: The upper end of described piston rod (16) adjusting nut (10) is provided with the thickness adjusted cushion block controlling fabric thickness (9)。
4. utilize system described in claim 2 or 3 to carry out fabric thick to a measuring method for steady-state permeation rate, its It is characterised by that step is as follows:
Step 1: by die surface wiped clean, dry, then uses two pieces of porous sieve plates to clamp tested fabric Rear one is placed in tubular tank (14), and makes liquid outlet pipeline (12) be positioned at the upper end of porous sieve plate;Use and live On stopper rod, mat thickness regulation cushion block adjusting nut controls fabric thickness;
Step 2: open air compressor, opens valve, by the inlet of mould (6) lower end in tubular tank Injecting liquid, liquid passes porous sieve plate wetting fibre fabric, when the liquid outlet pipeline (12) of tubular tank has liquid stream When going out, it is believed that liquid complete wetting fabric;
Step 3: regulation pressure valve, after reaching required injection pressure, goes out from tubular tank in weighing the t time by balance Quality m of the liquid that mouth flows out, according toSolving fabric thick to steady-state permeation rate K, in formula, m is one Liquid in t of fixing time flows out quality, and s is that liquid flows through cross-sectional area, and L is fabric thickness, P0For injection pressure Power, μ is the viscosity of liquid, and ρ is the density of liquid.
CN201610247134.2A 2016-04-20 2016-04-20 Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric CN105954169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610247134.2A CN105954169A (en) 2016-04-20 2016-04-20 Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610247134.2A CN105954169A (en) 2016-04-20 2016-04-20 Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric

Publications (1)

Publication Number Publication Date
CN105954169A true CN105954169A (en) 2016-09-21

Family

ID=56917748

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610247134.2A CN105954169A (en) 2016-04-20 2016-04-20 Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric

Country Status (1)

Country Link
CN (1) CN105954169A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106841005A (en) * 2017-02-07 2017-06-13 湖南大学 Test the device and its application system and method for liquid Composite Permeability rate
CN106872333A (en) * 2017-03-08 2017-06-20 西北工业大学 The measuring method and measuring system of a kind of fabric face intrinsic permeability
CN112082919A (en) * 2020-08-21 2020-12-15 西南交通大学 Device for testing permeability of graded broken stone-high polymer grouting solidified body

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1651899A (en) * 2005-02-25 2005-08-10 天津工业大学 Method for testing external permeability of fibre fabre surface
CN101051019A (en) * 2007-05-15 2007-10-10 北京航空航天大学 Permeability detecting device and saturated permeability detecting method fiber spread layer surface and thickness direction
CN102778424A (en) * 2012-08-22 2012-11-14 山东大学 Fabric thickness directional permeability testing device and testing method
JP2013228384A (en) * 2012-03-28 2013-11-07 Daiki Rika Kogyo Kk Infiltration measuring device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1651899A (en) * 2005-02-25 2005-08-10 天津工业大学 Method for testing external permeability of fibre fabre surface
CN101051019A (en) * 2007-05-15 2007-10-10 北京航空航天大学 Permeability detecting device and saturated permeability detecting method fiber spread layer surface and thickness direction
JP2013228384A (en) * 2012-03-28 2013-11-07 Daiki Rika Kogyo Kk Infiltration measuring device
CN102778424A (en) * 2012-08-22 2012-11-14 山东大学 Fabric thickness directional permeability testing device and testing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LIANGCHAO FANG ET AL: "Effect of Nesting on the Out-of-Plane Permeability of Unidirectional Fabrics in Resin Transfer Molding", 《APPL COMPOS MATER》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106841005A (en) * 2017-02-07 2017-06-13 湖南大学 Test the device and its application system and method for liquid Composite Permeability rate
CN106841005B (en) * 2017-02-07 2019-04-30 湖南大学 The method for testing liquid Composite Permeability rate
CN106872333A (en) * 2017-03-08 2017-06-20 西北工业大学 The measuring method and measuring system of a kind of fabric face intrinsic permeability
CN112082919A (en) * 2020-08-21 2020-12-15 西南交通大学 Device for testing permeability of graded broken stone-high polymer grouting solidified body

Similar Documents

Publication Publication Date Title
Bishop et al. The influence of end restraint on the compression strength of a cohesionless soil
US3135640A (en) Process of and an apparatus for manufacturing hollow articles from reinforced synthetic resins
CA2362768C (en) Method and apparatus for molding composite articles
US5023041A (en) Method for making a fiber reinforced composite article
Rodriguez et al. Permeability-porosity relationship in RTM for different fiberglass and natural reinforcements
CN102753494B (en) The idle compacting of cigarette for optical fiber outer cladding
CN103994943B (en) A kind of coal/shale adsorption isotherm experiment device
US8480393B2 (en) Vacuum-assisted resin transfer molding process with reusable resin distribution line
CN102890147B (en) Test system for simulating pore-fissure double-medium seepage hydraulic characteristics
US3353219A (en) Vacuum-forming mold
CN104097288B (en) A kind of supercritical fluid auxiliary polyalcohol moulded from foam device
CN102795485B (en) Machine for automatically filling quantitative powder
CN106769341B (en) A kind of rocks sample preparation device and preparation method containing blind joint
Ferland et al. Concurrent methods for permeability measurement in resin transfer molding
US10486375B2 (en) Production method and production apparatus for fiber-reinforced plastic
CN2826404Y (en) Pressurized flexible-wall permeameter
CN204758406U (en) Consider rock expansion pressure test appearance of drying and watering cycle effect
CN102216048A (en) Constant pressure infusion process for resin transfer molding
WO2009103736A3 (en) Method and apparatus for detecting leak in a vartm process
CN103383325A (en) Testing device for simulating concrete test piece hydraulic fracture under multi-field coupling condition
US20040083065A1 (en) Gas flow method for detection of local preform defects based on statistical analysis
US7553435B2 (en) Method and apparatus for molding composite articles
CN102590063B (en) Test device and test method for penetration clogging of soil
CN104227846B (en) A kind of foam slurry device for formulating and application thereof
CN106124362B (en) A kind of ultrasound plasticizing capillary rheometer and viscosity determining procedure

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20160921