CN110514520A - A kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesion force test method - Google Patents

A kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesion force test method Download PDF

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Publication number
CN110514520A
CN110514520A CN201910821175.1A CN201910821175A CN110514520A CN 110514520 A CN110514520 A CN 110514520A CN 201910821175 A CN201910821175 A CN 201910821175A CN 110514520 A CN110514520 A CN 110514520A
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CN
China
Prior art keywords
interlayer
semi
fibreglass
force test
sample coupon
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Pending
Application number
CN201910821175.1A
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Chinese (zh)
Inventor
郎利辉
绳斯佳
张猛
肖毅
李世越
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Beihang University
Beijing University of Aeronautics and Astronautics
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Beijing University of Aeronautics and Astronautics
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Priority to CN201910821175.1A priority Critical patent/CN110514520A/en
Publication of CN110514520A publication Critical patent/CN110514520A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0025—Shearing

Abstract

The invention proposes a kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesion force test methods.This method mainly realizes semi-cured state composite layered plate in the case where thickness direction applies certain load, and interlayer can produce relative motion, and obtain different thick Xiang Zaihe and speed of related movement to the affecting laws of interlayer cohesive force.This method includes the thick design to press fixture and processing, aluminium alloy blanking and surface treatment, the preparation of sample coupon and interlayer cohesive force testing experiment process.Laminate interlayer cohesion force test method in semi-solid preparation fibreglass-reinforced metal proposed by the present invention use stretching clamp, make composite layered plate thickness to apply pressure condition under relative motion is generated between metal plate and prepreg, to measure Interaction between layers power.This test method is simple and easy, and data measured is true and reliable and stablizes, and can be used for deeply probing into interaction mechanism between the laminate forming process middle layer of semi-solid preparation fibreglass-reinforced metal.

Description

A kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesion force test method
Technical field
The invention belongs to composite layered plate basic property testing fields.
Background technique
Fibreglass-reinforced metal laminate (FMLs, Fiber Metal Laminates) is pre- by sheet metal and fiber/resin Leaching expects to be laminated made of alternate laying solidification, substantially a kind of interply hybrid composites.It is good tough that it combines metal Property and fiber high-strength ratio, reducing density, while environment rotproofness etc. also has a degree of raising.Common manufacturing process Have from forming technique, roll forming, contour peening and VARTM forming etc., difficulties for forming mainly has: a. molding condition include heat, Power recombination energy field action, environment are complex；B. various deformation occurs in forming process, forming process and defect mechanism of production are multiple It is miscellaneous；C. it is influenced by elongate fiber amount, the forming limit of laminate is low.
U.S. R.D Weir Ke Ersong in 2013 proposes that laminate is allowed to slide manufacture laminated composite plate structures during forming Method, while the manufacturing process such as nearly 2 years punching presses, filling liquids attempt in forming process allow laminate occur Incoordinate deformation with Improve the forming limit of laminate.Domestic Lang Lihui team proposes that " semi-solid preparation forming " is forming after the completion of paving, utilizes preimpregnation The viscoplasticity feature of material, improves forming limit using interlayer Incoordinate deformation.This kind of method forming is complicated, it is therefore desirable to a kind of Test method probe between aluminium sheet and prepreg occur Incoordinate deformation during the cohesive force mechanism of action.The present invention may be implemented In the case where laminate thickness direction applies certain load, the load-displacement curves of stratified deformation are obtained, while can visit using the present invention Study carefully the different thick influences to pressure loading and interlayer speed of related movement to cohesion power effect mechanism.
Summary of the invention
A kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesion force test method provided by the invention include in order into Capable the following steps:
1) it is designed according to the geomery of sample coupon and processes thickness to press fixture, which can be to multilayer plate thickness Direction applies certain load.
2) it using wire cutting machine to aluminium alloy plate blanking, and is polished with sand paper and removes the burr of cut place.Using " acetone The process of surface treatment of (surface treatment liquid) processing-rinsing-alkali cleaning-rinsing-phosphoric acid " to metal sheet surface at Reason.
3) manual laying prepares fibreglass-reinforced metal laminate interlayer cohesive force test sample.
4) process of interlayer cohesive force testing experiment includes: and a) is applied centainly by compression platen to laminate lamination area Load；B) so that composite layered plate is generated interlayer relative motion using tensioning chuck, and obtain test result.
Detailed description of the invention
Fig. 1 is to show using press fixture structure provided by the invention and by the fixture plate application pressure loading process It is intended to.
Fig. 2 is the schematic diagram of sample coupon positioning during paving preparation and test using sample coupon provided by the invention.
Fig. 3 is to composite layer plate thickness using provided by the invention to stretching when pressurization, to make between aluminium sheet and prepreg The test process schematic of relative motion occurs.
Specific embodiment
With reference to the accompanying drawing with specific embodiment to a kind of semi-solid preparation fibreglass-reinforced metal laminate layer provided by the invention Between cohesion force test method be described in detail.
As shown in Fig. 1-Fig. 3, a kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesive force test side provided by the invention Method includes the following steps:
1) thickness for designing and processing according to the geomery of sample coupon is as shown in Figure 1 to press fixture.Wherein 1 is pressurization Bar, 2 be fastening screw, and 3 be upper mounted plate, and 4 be top board, and 5 be lower platen, and 6 be spring, and 7 be bottom plate.
2) pressure rod 1 and top board 4 fasten, and fastening screw 2 is only contacted with top board 4, and the metal plates of the device are 304 stainless steel materials, processing and manufacturing are processed using lathe, and surface is processed by shot blasting, keeps surface smooth.Spring 6 can be held The maximum load received is depending on testing program；The bottom of the lower plane of top board 4 and the upper plane of lower platen 5 and bottom plate 7 Face is parallel, and the depth of parallelism requires 0.03.
3) top board 5 is directly contacted with lower platen 6 with sample coupon, width L1Greater than the width of sample coupon.
4) wire cutting machine blanking is utilized according to Fig. 2 size, test button length is L2, width L3, and polished with sand paper, really Protect aluminium sheet the smooth of the edge impulse- free robustness；Prepreg is that side length is L3Square.Using " acetone (surface treatment liquid) processing-rinsing- The process of surface treatment of alkali cleaning-rinsing-phosphoric acid-rinsing-drying " handles metal sheet surface.It is specific as follows:
A) prepare: removing the greasy dirt of metal sheet surface with acetone or special surface treatment fluid；
B) alkali cleaning: configuration lye, chemical component are NaOH and Na2CO3, content is for 25-30g/L.Heat the solution extremely 50-60 DEG C, the aluminium sheet alkali cleaning time is 0.5-1min；
C) it rinses: cleaning tap water rinse 2-5 minutes；
D) deoxidation: configuration HNO3Solution, content 300-500g/L, pickling deoxidation 2-5 minutes at room temperature；
E) it rinses: cleaning tap water rinse 2-5 minutes；
F) phosphoric acid: configuration H3PO4Solution, content 120-140g/L.Temperature be 25 ± 5 DEG C, DC voltage be It is reacted 20 ± 1 minutes under 10 ± 1V；
G) it rinses: cleaning tap water rinse 2-5 minutes；
H) it dries: being dried 15 minutes at 60 DEG C.
The metal testing plate handled well is put in vacuum bag and saves, and standing time is unsuitable too long, preferably no more than for 24 hours.Through table Test piece after surface treatment bare-handed cannot touch.
5) manual laying prepares fibre reinforced compos-ite plate interlayer cohesive force test sample.
It wears disposable dustless gloves and prepares sample coupon.Cut prepreg it is noted that along fiber direction, open preimpregnation Expect that internal fiber or resin cannot be destroyed when the packing film on surface.Accurate paving is carried out according to schematic diagram 2, and when paving should keep away Exempt to be involved in bubble, paving thickness uniformity.The sample coupon prepared is placed in clean dustless vacuum bag, after the completion of preparation It is used in 5 hours.
6) test process tensioning chuck uplink, sensor loading value first increases, after it is smaller at once, until real when preliminarily stabilised Test stopping, as the test process of interlayer " i.e. by relative motion --- stablize relative motion ".
7) specified pressure is applied to sample coupon laminate portion.
The sample coupon prepared is placed in as shown in Figure 1 between top board 4 and lower platen 5.Press fixture is placed in test On the pressing disc 8 of machine, pressure rod 1 is contacted with the upper platen 9 of testing machine.9 downlink of upper platen of testing machine, compression bar, which pushes, to be driven Push board clamping sample coupon, and the spring 6 that gradually reduces.Specified load is applied to sample coupon by the way that testing machine sensor is controllable And keep, by tightening the constant pressure for being applied to sample coupon thickness direction of two fastening screws 2.
8) as shown in figure 3, it is thick to the progress tensile shear(ing) test of pressure test specimen to applying.
Press fixture is clamped on tensioning chuck 10,11 together with sample coupon, clamps depth is greater than collet length 3/ 4.Metal gasket 12 is put between two aluminium sheets, it is ensured that plate is not layered when clamping.Tensioning chuck uplink drives intermediate gold Belong to plate uplink, interlayer gradually generates opposite relative motion.
9) after interlayer stablizes relative motion, the tensile load of testing machine is mutual between intermediate aluminium sheet and two sides prepreg It is 2 times of Interaction between layers power (weight for ignoring press fixture) that active force, i.e. testing machine, which measure shear-type load,.
10) plate thickness is greater than 2mm, and metal plate is made not occur during stretching or be plastically deformed less；Exist simultaneously During tensile shear, slab can make the press fixture on sample coupon stablize suspension, reduce experimental error.
11) the thick volume designed to press fixture is minimum, and the weight of upper lower platen two sides is almost the same, it is ensured that suspension is drawn Journey collet is extended through to stablize.
12) present invention can be realized by the decrement of spring applies different load to laminate thickness direction, to obtain Obtain interlayer relative motion test result under different pressures load.
13) tensile speed can be changed in the present invention in relative movement, to obtain different interlayer relative motion speed Spend the influence to test result.

Claims (8)

1. a kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesion force test method, it is characterised in that: the interlayer cohesion Force test method includes the following steps carried out in order:
1) it designs and processes thick to press fixture.
2) it using wire cutting machine to metal plate blanking, and is polished with sand paper and removes the burr of sheet metal edge.
3) manual laying prepares fibre reinforced compos-ite plate interlayer cohesive force test sample.
4) sample coupon prepared is placed between top board and lower platen, and press fixture is placed on the pressing disc of testing machine, Pressure rod is contacted with the upper platen of testing machine.
5) the upper platen downlink of testing machine, compression bar, which pushes, drives platen clamp sample coupon, and the spring that gradually reduces up and down.
6) it is controlled, specified load is applied to sample coupon and kept by testing machine sensor, by tightening two fastening screws The constant pressure for being applied to sample coupon thickness direction.
5) press fixture is clamped on tensioning chuck together with sample coupon, collet drives metal plate to make with certain speed uplink Relative motion occurs for interlayer, completes the test of interlayer cohesive force.
2. the thick lower surface of top board into press fixture described in claim 1, lower platen upper surface and bottom plate Bottom surface it is parallel, the depth of parallelism require 0.03.
3. the thick volume designed to press fixture described in claim 1 is minimum, and the weight of upper lower platen two sides is almost the same, Ensure to hang drawing process collet to stablize.
Laminate thickness direction is applied not 4. application press process described in claim 1 can be realized by the decrement of spring Same pressure, to obtain interlayer cohesive force test result under different pressures.
5. press fixture is clamped in tensioning chuck together with sample coupon in interlayer relative movement described in claim 1 On, clamp depth is greater than collet length 3/4.
6. interlayer speed of related movement can be changed in drawing process described in claim 1, to obtain different interlayer shears Influence of the speed to cohesive force test result.
7. plate thickness described in claim 1 is greater than 2mm, metal plate is made not occur or occur less plasticity change during stretching Shape, and slab easily makes the press fixture on sample coupon stablize suspension.
8. the technology can also promote the use of other alloys such as aluminium alloy, aluminium lithium alloy, titanium alloy etc..
CN201910821175.1A 2019-08-30 2019-08-30 A kind of semi-solid preparation fibreglass-reinforced metal laminate interlayer cohesion force test method Pending CN110514520A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114195536A (en) * 2021-12-06 2022-03-18 胡海峰 Method for enhancing performance between composite layers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87212345U (en) * 1987-09-29 1988-07-20 叶仲鑫 Binding strength testing instrument for corrugated board
CN103895315A (en) * 2014-02-19 2014-07-02 南京航空航天大学 Preparation molding method of Glare component
CN105004659A (en) * 2015-08-18 2015-10-28 无锡乐华自动化科技有限公司 Damp-heat resistance detecting tooling for metal sheet
CN105136567A (en) * 2014-11-28 2015-12-09 振石集团恒石纤维基业有限公司 Composite material mechanical property testing equipment
CN207408228U (en) * 2017-11-02 2018-05-25 上汽大众汽车有限公司 Determine load persistent pressure device
CN108982180A (en) * 2018-07-26 2018-12-11 张家港康得新光电材料有限公司 The preparation method of ply adhesion test sample

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87212345U (en) * 1987-09-29 1988-07-20 叶仲鑫 Binding strength testing instrument for corrugated board
CN103895315A (en) * 2014-02-19 2014-07-02 南京航空航天大学 Preparation molding method of Glare component
CN105136567A (en) * 2014-11-28 2015-12-09 振石集团恒石纤维基业有限公司 Composite material mechanical property testing equipment
CN105004659A (en) * 2015-08-18 2015-10-28 无锡乐华自动化科技有限公司 Damp-heat resistance detecting tooling for metal sheet
CN207408228U (en) * 2017-11-02 2018-05-25 上汽大众汽车有限公司 Determine load persistent pressure device
CN108982180A (en) * 2018-07-26 2018-12-11 张家港康得新光电材料有限公司 The preparation method of ply adhesion test sample

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114195536A (en) * 2021-12-06 2022-03-18 胡海峰 Method for enhancing performance between composite layers

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