CN109100245A - A kind of device measuring energy absorbent block load-deformation curve - Google Patents
A kind of device measuring energy absorbent block load-deformation curve Download PDFInfo
- Publication number
- CN109100245A CN109100245A CN201811100341.0A CN201811100341A CN109100245A CN 109100245 A CN109100245 A CN 109100245A CN 201811100341 A CN201811100341 A CN 201811100341A CN 109100245 A CN109100245 A CN 109100245A
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- CN
- China
- Prior art keywords
- metal gasket
- metal
- gasket
- deformation curve
- output end
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- Legal status (The legal status 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 status listed.)
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Classifications
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling 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
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
-
- 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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
Abstract
The invention belongs to the fields of automotive upholstery energy-absorbing material performance parameter measurement, it is related to a kind of device for measuring energy absorbent block stress-strain diagram, including jump bit, acceleration transducer, the first metal gasket, metal tube, the second metal gasket, force snesor, it is characterized in that, the acceleration transducer is adhesive in jump bit top by strength, the lower part of first metal gasket and jump bit is spirally connected, respectively with the first metal gasket, the second welded metal pad, the force snesor is screwed onto below the second metal gasket the metal tube upper and lower ends；Test device of the invention can not only guarantee the portability of experimental provision and the accuracy of test result, but also reduce the influence to environmental impact, while also solve the security hidden trouble in test process.
Description
Technical field
The present invention relates to a kind of devices for measuring energy absorbent block load-deformation curve, belong to automotive upholstery energy-absorbing material
The field of energy parameter measurement.
Background technique
When automobile interior decoration impact property CAE is emulated, need to obtain a series of load-deformation curve data of materials, at present
The parameter is obtained by the experiment with falling objects of mass block.
Freely falling body method is to be converted into kinetic energy using the gravitional force of mass block, and experiment sample block is compressed, while
Acceleration transducer is pasted on mass block, measures the variation of acceleration in the whole process, and the calculating of one side connexus gauge block is answered
On the other hand power is calculated by integrated acceleration and is strained, can get the load-deformation curve of exemplar with this.
The experimental provision existing defects of traditional freely falling body method mainly have:
(1) mass block in device is heavier, when experiment fall contacted with test sample when impact generation noise it is very big,
Especially test rigidity biggish material when it is more significant.
(2) it if required impact velocity is larger, needs to adjust mass block in higher position, whole device can be very huge
Greatly, occupied space.
(3) since mass block is heavier and setting position is high, a possibility that in test process to instrument and equipment or personal injury
Just it will increase.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, a kind of dress for measuring energy absorbent block load-deformation curve is proposed
It sets, which can both guarantee the portability of experimental provision and the accuracy of test result, decrease to environmental impact
It influences, while also solving the characteristic bring security hidden trouble due to experimental provision in test process.
To realize the above technical purpose, the technical scheme is that a kind of dress for measuring energy absorbent block stress-strain diagram
It sets, including jump bit, acceleration transducer, the first metal gasket, metal tube, the second metal gasket, force snesor, feature exist
In the acceleration transducer is adhesive in jump bit top, the lower part spiral shell of first metal gasket and jump bit by strength
It connects, for the metal tube upper and lower ends respectively with the first metal gasket, the second welded metal pad, the force snesor is screwed onto
Below two metal gaskets.
Further, the jump bit 1 includes hammer handle and tup, and the acceleration transducer includes acceleration signal acquisition
End and acceleration signal output end, the acceleration signal collection terminal are located at the top of acceleration transducer, and acceleration signal is defeated
Outlet is connect by signal transmssion line with test equipment, and the acceleration transducer is adhesive in tup top by strength.
Further, threaded rod is welded on first metal gasket, the tup lower part of the jump bit is equipped with screw thread
Hole, first metal gasket are connect by threaded rod and being spirally connected for threaded hole with jump bit.
Further, second metal gasket center is equipped with the threaded hole of perforation, and the force snesor includes force signal
Collection terminal and force signal output end, the force signal output end are equipped with screw thread, and the force snesor passes through force signal output end
Threaded hole is threaded into connect with the second metal gasket.
Further, the tube wall of the metal tube is equipped with aperture, and the force signal output end of the force snesor passes through the
The threaded hole of two metal gaskets, and aperture is pierced by by signal transmssion line and is connect with test equipment.
Further, the thickness of first metal gasket and the second metal gasket is 2.5mm~3.5mm.
Further, the diameter of first metal gasket and the second metal gasket is all larger than the diameter of metal tube, and gold
The diameter of category pipe is greater than the diameter of the screwed hole of centre of the second metal gasket.
Compared with prior art, the invention has the following advantages that
The configuration of the present invention is simple, easy to make, the quality for efficiently avoiding primitive apparatus big is brought greatly with occupied space
Storage and environment influence the problems such as, improve test process safety coefficient, while ensure that the reasonable of test data analysis
Property and validity.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is schematic cross-sectional view of the invention.
Fig. 3 is the change curve of power in the embodiment of the present invention.
Fig. 4 is the change curve of acceleration in the embodiment of the present invention.
Fig. 5 is the compressive deformation curve graph of material in the embodiment of the present invention.
Fig. 6 is the stress-strain curve that exemplar is tested in the embodiment of the present invention.
Description of symbols: 1-jump bit；1-1-hammer handle；1-2-tup；2-acceleration transducers；2-1-acceleration
Spend signal acquisition terminal；2-2-acceleration signal output end；3-the first metal gasket；4-metal tubes；4-1-aperture；5-the
Two metal gaskets；6-force snesors；6-1-force signal collection terminal；6-2-force signal output end.
Specific embodiment
Below with reference to specific drawings and examples, the invention will be further described.
As shown in Figure 1, a kind of device for measuring energy absorbent block load-deformation curve, including jump bit 1, acceleration transducer
2, the first metal gasket 3, metal tube 4, the second metal gasket 5, force snesor 6, the acceleration transducer 2 pass through strength gluing
Be spirally connected in the lower part on 1 top of jump bit, first metal gasket 3 and jump bit 1,4 upper and lower ends of metal tube respectively with
First metal gasket 3, the welding of the second metal gasket 5, the force snesor 6 are screwed onto 5 lower section of the second metal gasket.
The jump bit 1 includes hammer handle 1-1 and tup 1-2, and the acceleration transducer 2 includes acceleration signal collection terminal
2-1 and acceleration signal output end 2-2, the acceleration signal collection terminal 2-1 are located at the top of acceleration transducer 2, accelerate
Degree signal output end 2-2 is connect by signal transmssion line with test equipment, and the acceleration transducer 2 is adhesive in hammer by strength
The top head 1-2.
Threaded rod is welded on first metal gasket 3, the lower part tup 1-2 of the jump bit 1 is equipped with threaded hole, institute
The first metal gasket 3 is stated to connect by threaded rod and being spirally connected for threaded hole with jump bit 1.
Second metal gasket, 5 center is equipped with the threaded hole of perforation, and the force snesor 6 includes force signal collection terminal 6-
1 and force signal output end 6-2, the force signal output end 6-2 are equipped with screw thread, and the force snesor 6 passes through force signal output end
The threaded hole that is threaded into of 6-2 is connect with the second metal gasket 5, in test process, the force signal collection terminal 6-1 and detected sample
Part contact.
The tube wall of the metal tube 4 is equipped with aperture 4-1, and the force signal output end 6-2 of the force snesor 6 passes through second
The threaded hole of metal gasket 5, and aperture 4-1 is pierced by by signal transmssion line and is connect with test equipment.
The diameter of first metal gasket 3 and the second metal gasket 5 is all larger than the diameter of metal tube 4, and the diameter of metal tube 4
Greater than the diameter of the screwed hole of centre of the second metal gasket 5.
The thickness of the first metal gasket 3 and the second metal gasket 5 is about 3mm, the screw thread of the lower part tup 1-2 in the present embodiment
The diameter in hole is about 3mm, and the diameter of the first metal gasket 3 is slightly larger than the diameter of tup 1-2, and the screw rod of the center welding with
Tup 1-2 threaded hole matches, and the first metal gasket 3 is made to be fixed on the lower part tup 1-2,5 center position of the second metal gasket
Threaded hole match with the screw thread of 6 signal output end 6-2 of force snesor, it is therefore an objective to force snesor 6 is fixed on the second metal
On gasket 5, the diameter of the aperture 4-1 on 4 tube wall of metal tube is 5mm~10mm, it is therefore an objective to the signal of force snesor 6 be facilitated to transmit
Line is freely pierced by.
The strength of acceleration transducer 2 need to be only adhesive in by apparatus of the present invention in the load-deformation curve of test material
On tup 1-2, the acceleration signal output end 2-2 of acceleration transducer 2 is connect by signal transmssion line with test equipment；By
One metal gasket 3 is screwed into the bottom of tup 1-2, then the first metal gasket 3, the second metal gasket 5 and metal tube 4 are welded on
Together, then signal transmssion line is penetrated from the aperture 4-1 on 4 tube wall of metal tube, is then passed through the spiral shell at 5 center of the second metal gasket
Pit is connect with the force snesor output end 6-2 of force snesor 6, then passes through the force snesor output end 6-2 of force snesor 6
Threaded hole is tightened on the second metal gasket 5, and finally the signal transmssion line of force snesor 6 is connected in test equipment,
The installation of whole device is just completed, and impact test can be carried out.
Test process of the invention is, when test, catches the hammer handle 1-1 of jump bit 1, makes whole device impact in detected sample
The surface of part, when force snesor 6 starts to contact with tested sample surface, force snesor 6 and acceleration transducer 2 start to remember
Record, during the entire process of the moment that apparatus of the present invention are contacted with tested sample surface to the device speed is zero, the power of measurement
With the change curve of acceleration；
It is about 30kg/m with density3, for the tested exemplar that thickness is about 50mm, measure force curve as shown in figure 3, according to
Material stress formulaWherein F (t): the change curve of power, A: contact area can calculate stress σ (t)
Value；
Acceleration change curve is measured as shown in figure 4, further according to formula Δ l (t)=∫ ∫ a (t) dt, wherein a (t): accelerated
Change curve is spent, calculates the compression set values Δ l (t) of material, as shown in Figure 5；
Further according to strain formulaWherein l: the size before material deformation calculates strain stress (t) value.
Finally according to formulaThe load-deformation curve of the tested exemplar is finally obtained, as shown in Figure 6.
Compact of the present invention, structure is simple, can assemble and dismantle at any time, reusable, improves jump bit, sensing
The utilization rate of device, test result is accurate, overcomes defect existing for the experimental provision of existing freely falling body method.
The present invention and its embodiments have been described above, description is not limiting, it is shown in the drawings also only
It is one of embodiments of the present invention, practical structures are not limited thereto.All in all if those skilled in the art
It is enlightened by it, without departing from the spirit of the invention, is not inventively designed similar with the technical solution
Frame mode and embodiment, are within the scope of protection of the invention.
Claims (7)
1. a kind of device for measuring energy absorbent block load-deformation curve, including jump bit (1), acceleration transducer (2), the first gold medal
Belong to gasket (3), metal tube (4), the second metal gasket (5), force snesor (6), which is characterized in that the acceleration transducer
(2) jump bit (1) top is adhesive in by strength, first metal gasket (3) and the lower part of jump bit (1) are spirally connected, described
Metal tube (4) upper and lower ends are welded with the first metal gasket (3), the second metal gasket (5) respectively, force snesor (6) spiral shell
It connects below the second metal gasket (5).
2. a kind of device for measuring energy absorbent block load-deformation curve according to claim 1, it is characterised in that: the punching
Hammer (1) includes hammer handle (1-1) and tup (1-2), and the acceleration transducer (2) includes acceleration signal collection terminal (2-1)
With acceleration signal output end (2-2), the acceleration signal collection terminal (2-1) is located at the top of acceleration transducer (2), adds
Speed signal output end (2-2) is connect by signal transmssion line with test equipment, and the acceleration transducer (2) passes through seccotine
It is sticked to the top tup (1-2).
3. a kind of device for measuring energy absorbent block load-deformation curve according to claim 2, it is characterised in that: described the
Threaded rod is welded on one metal gasket (3), the tup lower part (1-2) of the jump bit (1) is equipped with threaded hole, first gold medal
Belong to gasket (3) to connect by threaded rod and being spirally connected for threaded hole with jump bit (1).
4. a kind of device for measuring energy absorbent block load-deformation curve according to claim 1, it is characterised in that: described the
Two metal gaskets (5) center is equipped with the threaded hole of perforation, and the force snesor (6) includes force signal collection terminal (6-1) and power letter
Number output end (6-2), the force signal output end (6-2) are equipped with screw thread, and the force snesor (6) passes through force signal output end
The threaded hole that is threaded into of (6-2) is connect with the second metal gasket (5).
5. a kind of device for measuring energy absorbent block load-deformation curve according to claim 4, it is characterised in that: the gold
The tube wall for belonging to pipe (4) is equipped with aperture (4-1), and the force signal output end (6-2) of the force snesor (6) passes through the second metal gasket
The threaded hole of piece (5), and aperture (4-1) is pierced by by signal transmssion line and is connect with test equipment.
6. a kind of device for measuring energy absorbent block load-deformation curve according to claim 1, it is characterised in that: described the
The thickness of one metal gasket (3) and the second metal gasket (5) is 2.5mm ~ 3.5mm.
7. a kind of device for measuring energy absorbent block load-deformation curve according to claim 1, it is characterised in that: described the
The diameter of one metal gasket (3) and the second metal gasket (5) is all larger than the diameter of metal tube (4), and the diameter of metal tube (4) is big
In the diameter of the screwed hole of centre of the second metal gasket (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811100341.0A CN109100245A (en) | 2018-09-20 | 2018-09-20 | A kind of device measuring energy absorbent block load-deformation curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811100341.0A CN109100245A (en) | 2018-09-20 | 2018-09-20 | A kind of device measuring energy absorbent block load-deformation curve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109100245A true CN109100245A (en) | 2018-12-28 |
Family
ID=64866867
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811100341.0A Pending CN109100245A (en) | 2018-09-20 | 2018-09-20 | A kind of device measuring energy absorbent block load-deformation curve |
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| CN (1) | CN109100245A (en) |
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| CN1609578A (en) * | 2004-11-25 | 2005-04-27 | 上海交通大学 | Dynamic stiffness test system for large high-speed dynamic balancer oscillating frame |
| CN102288495A (en) * | 2011-06-09 | 2011-12-21 | 南京林业大学 | Method for testing dynamic stiffness of pillar system of bamboo/wooden structure house |
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| US20140007394A1 (en) * | 2012-07-05 | 2014-01-09 | Surface Technology Holdings, Ltd. | Method and compression apparatus for introducing residual compression into a component having a regular or an irregular shaped surface |
| CN103911958A (en) * | 2014-04-04 | 2014-07-09 | 大连理工大学 | Damage locating system and methods for use in periodic detection of suspension bridge and arch bridge suspenders |
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Application publication date: 20181228 |
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