CN110031332A - A kind of test method of boardness - Google Patents

A kind of test method of boardness Download PDF

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Publication number
CN110031332A
CN110031332A CN201910354854.2A CN201910354854A CN110031332A CN 110031332 A CN110031332 A CN 110031332A CN 201910354854 A CN201910354854 A CN 201910354854A CN 110031332 A CN110031332 A CN 110031332A
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sample
experimental bench
gravity
edge
center
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CN110031332B (en
Inventor
敬凌霄
蒋晨龙
赵苗苗
冯凌瀚
代超越
李志华
彭淑蘭
叶重阳
张同华
周骏
张再兴
汪涛
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Southwest University
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    • 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
    • G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending 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
    • G01N2203/0023—Bending
    • 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
    • G01N2203/003—Generation of the force
    • G01N2203/0032—Generation of the force using mechanical means
    • G01N2203/0033—Weight
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0278—Thin specimens
    • G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

A kind of test method of boardness, using following steps, step 1: carrying out testing preceding preparation, be provided with experimental bench (1), three-dimensional perception sensor and processing system；Step 2: experimental bench (1) is horizontally disposed, uniform level face is located at the top of three-dimensional perception sensor and experimental bench (1), processing system is calibrated；Step 3: sample (2) is laid on experimental bench (1), if the surface of sample (2) is S (x, y), after sample (2) gridding, S is expressed as to any one net region on sample (2)i(xi, yi), i (0,1,2,3...n...m), the surface density of each net region is expressed asBy the foundation of three-dimensional coordinate by fabric digitization, through data, the center of gravity that overhang fabric is obtained by mechanics calculating formulae is calculated its bending stiffness, the hardness or flexibility for symbolizing fabric that bending stiffness can be apparent by the angle of center of gravity and source textile vertical plane.

Description

A kind of test method of boardness
Technical field
The present invention relates to textile garment performance test fields, and in particular to a kind of test method of boardness.
Background technique
The ability that fabric resists its bending direction change in shape is known as bending stiffness i.e. stiffness, is commonly used to evaluation fabric Softness, while also determining the suspending weight and feel of fabric.General clothing fabric underwear dress materials need good Flexibility, to meet, human body is personal and aptamer, coat material should keep necessary shape when taking and make with certain Type ability.In addition, the outdoor sports textile often folded, stiffness directly affect its durability and practicability.With people Requirement to textile fabric turns to comfort type from practical, and stiffness has become the weight of the textile fabric producer and clothes consumer Want one of appraisal standards.Therefore, stiffness is an important indicator of the performance that fabric is taken, and how to carry out preferably test fabric Stiffness be also people research hot spot.
Existing boardness test method has inclined plane method, heart-shaped method and Fabric Style instrument method of testing.And existing fabric Stiffness Tester generally requires appearance of fabrics smooth, there is certain shape need, and then for the fabric of irregular out-of-flatness Without specific feasible test method.Under normal conditions, the appearance form of fabric is out-of-flatness or slightly how irregular fold, shape be , therefore just have certain limitation to the test scope of boardness.In order to more preferably expand the scope of application of stiffness test To meet the multifarious situation of fabric, set forth herein the methods that one kind can test irregular boardness.
Summary of the invention
In view of the deficiencies of the prior art, the present invention proposes a kind of test methods of boardness, and specific technical solution is such as Under:
A kind of test method of boardness, it is characterised in that:
Using following steps,
Step 1: carrying out testing preceding preparation, be provided with experimental bench (1), three-dimensional perception sensor and processing system；
Step 2: experimental bench (1) is horizontally disposed, uniform level is located at the top of three-dimensional perception sensor and experimental bench (1) Processing system is calibrated in face；
Step 3: sample (2) being laid on experimental bench (1), if the surface of sample (2) is S (x, y), sample (2) grid After change, S is expressed as to any one net region on sample (2)i(xi, yi), i (0,1,2,3...n...m), each net region Surface density be expressed as
Step 4: by sample (2), from experimental bench (1) to experimental bench (1), the edge (3) of any side pushes away push-pull device at fixed, and edge should Edge (3) length direction is provided with X-axis, and the X-axis is overlapped with edge (3)；
So that the side of sample (2) is located at real under the effect of gravity along the sagging formation depending portion in experimental bench (1) edge (3) The sample (2) tested on platform (1) surface is horizontal part；
Dog-ear is formed between the horizontal part and the depending portion；
Step 5: three-dimensional perception sensor acquires the 3-D image of sample (2) depending portion, which is uploaded everywhere In reason system；
Step 6: the length of measurement sample (2) along the x axis is L, if the area of overhang is denoted as
Step 7: determining equivalent length L=Sx/LAB；
Step 8: determining that the density of the mesh module of depending portion is closed according to formula are as follows: The density of the mesh module is derived as, the density samples of mesh module (2) density is expressed as after griddingAfter by push, deformation occurs, overhang density is expressed asBecauseIn, quality do not change so, S′i=x 'iy′i, thus obtain
Step 9: determining the quality of depending portion are as follows:
Step 10: the center of gravity of overhang is determined, specifically, the center of gravity of overhang is G (x0, y0, z0):
Step 11: being provided with angle is θ, center of gravity G (x0, y0, z0) perpendicular to edge (3) work the first line (4), along edge (3) make plumb line (5), the angle that θ is the first line (4) and plumb line (5) is formed；
If center of gravity G (x0, y0, z0) distance of edge (3) is arrived as b；
Then
Step 12: according to sample (2) position center of gravity G, establishing sample (2) stress model, determine the bending stiffness of sample (2) EI。
Further: the testing stand is made of organic glass, which includes square base, in the square Base center position is provided with boss, and the area of the upper surface of the boss is 25*25cm；
The three-dimensional perception sensor is XBOX Kinect.
The invention has the benefit that first, fabric digitization is led to through data by the foundation of three-dimensional coordinate Mechanics calculating formulae is crossed to obtain the center of gravity of overhang fabric, its bending resistance is calculated by the angle of center of gravity and source textile vertical plane Rigidity, the hardness or flexibility for symbolizing fabric that bending stiffness can be apparent.
Second, inventive process avoids the mistakes generated when measuring and calculation its bending length, bending stiffness and composite bending modulus Difference can be with the more accurate quick hardness or flexibility for obtaining fabric using threedimensional model.
Third, in test scope, this method is applicable not only to all kinds of woven fabrics such as cotton, hair, silk, fiber crops, chemical fibre, knitting The materials such as object and general non-woven fabric, coated fabric, paper, leather, film are applied also for rigidity and flexible all kinds of Composite material.
Detailed description of the invention
Fig. 1 is experimental provision structural schematic diagram；
Fig. 2 is the first mechanical model of sample center of gravity schematic diagram；
Fig. 3 is the second mechanical model of sample center of gravity schematic diagram；
Fig. 4 is sample center of gravity third mechanical model schematic diagram；
Fig. 5 is the 4th mechanical model schematic diagram of sample center of gravity；
Fig. 6 is the 5th mechanical model schematic diagram of sample center of gravity；
Fig. 7 is the 6th mechanical model schematic diagram of sample center of gravity；
Fig. 8 is the 6th mechanical model schematic diagram of sample center of gravity.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
A kind of test method of boardness as shown in Figure 1:,
Using following steps,
Step 1: carrying out testing preceding preparation, be provided with experimental bench 1, three-dimensional perception sensor and processing system；
Step 2: experimental bench 1 is horizontally disposed with, uniform level face is located at the top of three-dimensional perception sensor and experimental bench 1, it is right Processing system is calibrated；
Step 3: sample 2 being laid on experimental bench 1, if the surface of sample 2 is S (x, y), after 2 gridding of sample, to sample Any one net region is expressed as S on product 2i(xi, yi), the surface density of i (0,1,2,3...n...m), each net region indicate For
Step 4: push-pull device at fixed pushes away sample 2 from experimental bench 1 to the edge 3 of any side of experimental bench 1, long along the edge 3 Degree direction is provided with X-axis, and the X-axis is overlapped with edge 3；
So that the side of sample 2 is located at experimental bench 1 under the effect of gravity along the sagging formation depending portion in the edge of experimental bench 13 Sample 2 on surface is horizontal part；
Dog-ear is formed between the horizontal part and the depending portion；
Step 5: three-dimensional perception sensor acquires the 3-D image of 2 depending portion of sample, which is uploaded to processing In system；
Step 6: the length of measurement sample 2 along the x axis is L, if the area of overhang is denoted as
Step 7: determining equivalent length L=Sx/LAB；
Step 8: determining that the density of the mesh module of depending portion is closed according to formula are as follows:
Step 9: determining the quality of depending portion are as follows:
Step 10: the center of gravity of overhang is determined, specifically, the center of gravity of overhang is G (x0, y0, z0):
Step 11: step 11: being provided with angle is θ, center of gravity G (x0, y0, z0) perpendicular to the first line 4 of work of edge 3, along side Make plumb line 5 along 3, θ is the angle that the first line 4 and plumb line 5 are formed；
If center of gravity G (x0, y0, z0) distance of edge (3) is arrived as b；
Then
Step 12: according to the center of gravity G (x of sample 20, y0, z0) position, 2 stress model of sample is established, determines the anti-of sample 2 Curved rigidity EI, material that can according to actual needs with sample 2, selection such as Fig. 1 to such as 2 stress model of Fig. 7 any one sample, Obtain the bending stiffness EI of sample 2:
According to 2 stress model of sample is established as shown in Figure 1, bending stiffness EI be may be expressed as:
According to 2 stress model of sample is established as shown in Figure 2, bending stiffness EI be may be expressed as:
According to 2 stress model of sample is established as shown in Figure 3, bending stiffness EI be may be expressed as:
N --- number is divided in fabric draping part etc.；
According to 2 stress model of sample is established as shown in Figure 4, bending stiffness EI be may be expressed as:
Q --- the equally distributed load of overhang；
According to 2 stress model of sample is established as shown in Figure 5, bending stiffness EI be may be expressed as:
According to 2 stress model of sample is established as shown in Figure 6, bending stiffness EI be may be expressed as:
According to 2 stress model of sample is established as shown in Figure 7, bending stiffness EI be may be expressed as:
In the present invention, by measurement, the quality of sample one is 64g, by test, obtains the reality about the above various situations Data are tested, as follows:
First data, L=20cm, y0=6cm
In this example, according to stress model in Fig. 1 as calculating standard:
Second data, L=12cm, y0=5.4cm
In this example, according to stress model in Fig. 2 as calculating standard:

Claims (2)

1. a kind of test method of boardness, it is characterised in that:
Using following steps,
Step 1: carrying out testing preceding preparation, be provided with experimental bench (1), three-dimensional perception sensor and processing system；
Step 2: experimental bench (1) is horizontally disposed, uniform level face is located at the top of three-dimensional perception sensor and experimental bench (1), it is right Processing system is calibrated；
Step 3: sample (2) is laid on experimental bench (1), if the surface of sample (2) is S (x, y), after sample (2) gridding, S is expressed as to any one net region on sample (2)i(xi, yi), i (0,1,2,3...n...m), the face of each net region is close Degree is expressed as
Step 4: by sample (2), from experimental bench (1) to experimental bench (1), the edge (3) of any side pushes away push-pull device at fixed, along the edge (3) length direction is provided with X-axis, and the X-axis is overlapped with edge (3)；
So that the side of sample (2) is located at experiment under the effect of gravity along the sagging formation depending portion in edge (3) of experimental bench (1) Sample (2) on platform (1) surface is horizontal part；
Dog-ear is formed between the horizontal part and the depending portion；
Step 5: three-dimensional perception sensor acquires the 3-D image of sample (2) depending portion, which is uploaded to processing system In system；
Step 6: the length of measurement sample (2) along the x axis is L, if the area of overhang is denoted as
Step 7: determining equivalent length L=SX/LAB, LABFor sample (2) from A point to the length of B point on edge；
Step 8: determining that the density of the mesh module of depending portion is closed according to formula are as follows:
Step 9: determining the quality of depending portion are as follows:
Step 10: the center of gravity of overhang is determined, specifically, the center of gravity of overhang is G (x0, y0, z0):
Step 11: being provided with angle is θ, center of gravity G (x0, y0, z0) perpendicular to edge (3) work the first line (4), make along edge (3) Plumb line (5), the angle that θ is the first line (4) and plumb line (5) is formed；
If center of gravity G (x0, y0, z0) distance of edge (3) is arrived as b；
Then
Step 12: according to sample (2) position center of gravity G, establishing sample (2) stress model, determine the bending stiffness EI of sample (2).
2. a kind of test method of boardness according to claim 1, it is characterised in that: the testing stand is organic glass Glass is made, which includes square base, the square base center is provided with boss, the upper end of the boss The area in face is 25*25cm；
The three-dimensional perception sensor is XBOX Kinect.
CN201910354854.2A 2019-04-29 2019-04-29 Method for testing stiffness of fabric Active CN110031332B (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN110596356A (en) * 2019-09-19 2019-12-20 重庆市开州区静惟莎制衣厂 Fabric moisture absorption performance tester and testing method
CN111965003A (en) * 2020-08-18 2020-11-20 湖北中烟工业有限责任公司 Paper stiffness detection device and detection method for fragile anti-counterfeit label
CN113324849A (en) * 2021-06-08 2021-08-31 浙江理工大学 Multi-direction garment stiffness evaluation method based on single sample

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