CN106198265A - A kind of partition part testing fatigue assay device and test method - Google Patents

A kind of partition part testing fatigue assay device and test method Download PDF

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Publication number
CN106198265A
CN106198265A CN201610524421.3A CN201610524421A CN106198265A CN 106198265 A CN106198265 A CN 106198265A CN 201610524421 A CN201610524421 A CN 201610524421A CN 106198265 A CN106198265 A CN 106198265A
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partition part
fatigue
test
vibration
partition
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CN106198265B (en
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陈由红
兰博
王淑云
李凯
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BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
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BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
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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
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating 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
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic
    • 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
    • G01N2203/0073—Fatigue
    • 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

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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

The invention discloses a kind of partition part vibrationfatigue test assay device, including lower fixed pedestal and tabletting for fixing partition part, and partition part flange fillet position is implemented the vibration pressure head of pressure, described lower fixed pedestal is threaded connection and is arranged on fatigue tester matrix, partition part is positioned between lower fixed pedestal and tabletting, and fixed pedestal, employing clamping screw connection between partition part and tabletting, described vibration pressure head is threaded connection and is arranged on fatigue tester walking beam, and vibration pressure head coincide with partition part and contacts.The method that this assay device carries out vibrationfatigue test to partition part includes: first determine the material of partition part, then in ANSYS software, analyze the load of partition connecting elements, deformation displacement and stress in vibrational structure, compare with sunykatuib analysis acquired results according to the partition part yield strength value measured, tensile strength values, determine actual vibration fatigue test loading force, and carry out partition part vibration fatigue test.The present invention has the advantages such as the test period is short, experimentation cost is low, result of the test accurate science, can be used for evaluating partition part fatigue life and instructing partition Element Design.

Description

A kind of partition part testing fatigue assay device and test method
Technical field
The invention belongs to part performance detection technique field, relate to a kind of partition part testing fatigue assay device and test Method.
Background technology
Helicopter sphere thrust resilient bearing (resilient bearing) is the core unit of star-like flexible hub and ball flexible hub Part, realizes the waving of blade bearing, swings and displacement motion while blade rotates produced huge centrifugal force.Elastic shaft Hold and be made up of with rubber combined elastomeric laminate big joint, little joint and multiple partition part.Partition part and rubber Forming elastomer by bonding, big joint, little joint form an entirety with elastomeric laminate by bonding.Partition part and rubber The elastomeric laminate that glue is composited is the key component of resilient bearing.In resilient bearing works, subject axial compressive force, Radial side pressure, bending force.Partition part Influence of Fatigue Properties not quite can be ignored by torsional load, compressive load, radially load Lotus and bending load comprehensive function make partition part flange position produce at the volley to interfere, and form tired stress, every Sheet part flange fillet position becomes dangerous position.
Testing fatigue test is the testing experiment that partition part is important in design, sizing, production process, is surveyed by fatigue Have a try test may determine that partition part can during projected life in safety work.Currently without one individually for partition Part carries out method for testing fatigue, and whether the fatigue behaviour for examination partition part meets use requirement, uses assembling often The resilient bearing completed carries out global facility testing fatigue, although global facility method for testing fatigue relatively accurately, reliably, but is surveyed The examination cycle is long, and cost is high.
How to carry out testing fatigue for single partition part, and then provide accurately for partition part fatigue behaviour, reliably With economic performance detection data and forecast, become the problem that those skilled in the art need to solve.
Summary of the invention
The present invention is directed to the deficiency that above-mentioned prior art exists, it is provided that a kind of partition part testing fatigue test method, The method test period is short, experimentation cost is low, result of the test accurate science；Correspondingly provide a kind of result of the test accurately may be used simultaneously Lean on, experimentation cost is low, the partition part testing fatigue assay device of simple in construction.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is a kind of partition part testing fatigue test dress Put, including fixed pedestal and tabletting for fixing partition part, and pressure is implemented at partition part flange fillet position Vibration pressure head, described fixed pedestal is threaded connection and is arranged in fatigue tester main body, and partition part is positioned over fixing Between pedestal and tabletting, and fixed pedestal, employing clamping screw connection between partition part and tabletting, described vibration pressure head passes through Threaded being arranged in fatigue tester main body, vibration pressure head is identical with partition part to be contacted.
As total technology design, present invention also offers one and with above-mentioned assay device, partition part is carried out tired The test method of labor test, it specifically comprises the following steps that
(1) material of partition part is determined；
(2) in ANSYS software, create partition part vibration geometric model, define partition part material attribute, including close Degree, Young's modulus, Poisson's ratio；
(3) boundary condition of partition part vibration geometric model is set, such as deformation displacement, load；
(4) submit to computing to solve, after terminating, obtain partition inside parts stress, deformation displacement and load value；
(5) measure the yield strength of partition part material, tensile strength numerical value, and with simulation trial obtained by stress value Compare, select yield strength, tensile strength numerical value and the stress obtained by simulation trial, deformation displacement value corresponding time suitable Load value, determine Fatigue Testing Loads scope during actual tests, and set the spacing value from peak to minimum；
(6) being installed on by fixed pedestal on fatigue tester matrix, partition part is assemblied on fixed pedestal, and tabletting is placed in On partition part, tightening clamping screw, vibration pressure head is installed on the walking beam of fatigue tester,
(7) debugging loading equipemtn makes the flange fillet position of vibration pressure head contact partition part, sets loading force, starts tired Labor test machine, starts test；
(8) at interval of 2～4h, stop fatigue tester, observe the surface condition at the flange fillet position of partition part, if There is crackle to produce, then stop test, then using a new partition connecting elements, restarting test from step 6, if not finding Crackle, then protracted test to vibration number stops after reaching to set numerical value.
Accompanying drawing explanation
Structural representation when Fig. 1 is that in the embodiment of the present invention, partition part carries out vibration fatigue test.
Partial enlarged drawing
Fig. 2 0Cr18Ni9 partition internal stress and the relation curve of change in displacement.
Fig. 3 0Cr18Ni9 partition load and the relation curve of change in displacement.
In figure: 1, vibration pressure head 2, clamping screw 3, tabletting 4, partition part 5, fixed pedestal 6, fatigue tester matrix 7, Flange fillet position 8, walking beam.
Detailed description of the invention
Below with reference to drawings and Examples, technical solution of the present invention is further described:
Seeing shown in accompanying drawing 1, the step of the method is as follows:
(1) material of partition part is 0Cr18Ni9 rustless steel；
(2) in ANSYS software, create partition part vibrational structure geometric model, define 0Cr18Ni9 rustless steel partition material Material attribute, including density 7.93g/cm3, Young's modulus 193000MPa, Poisson's ratio 0.26；
(3) ANSYS software possesses dynamics analysis functionality, analytical structure kinetic characteristic in space, and determines structure In consequent stress, strain and deform.Setting partition part boundary condition in ANSYS software, the present embodiment sets 0Cr18Ni9 rustless steel partition vibration deformation maximum displacement 0.5mm；
(4) submit to computing to solve, obtain 0Cr18Ni9 rustless steel partition inside parts stress, load after terminating with deforming position The curvilinear motion figure (see Fig. 2, Fig. 3) moved；
(5) measure the stainless yield strength of 0Cr18Ni9 be 280MPa～290MPa, tensile strength be 670MPa～ 680MPa, finds out in fig. 2 and is about with the displacement corresponding to stainless steel material yield strength, tensile strength numerical value equivalent stress value 0.15mm and 0.25mm, then from Fig. 3, determine that the load corresponding with 0.15mm and 0.25mm displacement is 3800N and 1200N, determine Tired examination load range during actual tests is decremented to 1200N from 3800N, sets quantity of successively decreasing as 520N；
(6) being installed on fatigue tester matrix 6 by fixed pedestal 5, partition part 4 is assemblied on fixed pedestal 5, tabletting 3 are placed on partition part 4, tighten clamping screw 2, and vibration pressure head 1 is installed on the walking beam 8 of fatigue tester；
(7) debugging loading equipemtn makes vibration pressure head 1 contact the flange fillet position 7 of partition part 4, sets vibrating fatigue and carries Lotus, load type be banner, frequency of vibration be 12 hertz, strain ratio Kt=1, stress ratio R=0.1, starting device starts test；
(8) at interval of 2h, stopping fatigue tester, observing the surface condition at the flange fillet position of partition part, if having Crackle produces, then stop test, then using a new partition connecting elements, restarting test from step 6, if not finding to split Stricture of vagina, then protracted test reaches 1 × 10 to vibration number7Rear stopping.
Interpretation of result: according to above-described embodiment, test load is from the beginning of 3800N, through vibration 2.0 × 105Find after secondary There is crackle in 0Cr18Ni9 rustless steel partition surface, stops test, and then with a new partition part, load reduction is 3280N, Through vibration 1 × 107Do not find crackle after secondary yet, illustrate that the 0Cr18Ni9 rustless steel partition of this state shakes under the load of 3280N The dynamic life-span (occurring without crackle) can reach 230 hours.Result of the test can be partition part design provide data support, with Time can detect under certain loads, whether partition part meets design requirement.
Technical scheme advantage compared with prior art: the partition part testing fatigue assay device of present invention offer and examination Proved recipe method, can test the partition part that different process produces, the vibration life under certain stress, provide ginseng for design Examine；It is also possible to the fatigue behaviour of partition part is effectively predicted, save test period and testing cost, solved Having determined existing partition part cannot the single-piece problem that carries out fatigue property test.

Claims (2)

1. the device that partition part is carried out testing fatigue, it is characterised in that: this device is by lock by partition part (4) Tight bolt (2) is fixed on tabletting (3) and fixed pedestal (5) in-between, and fixed pedestal (5) is fixedly mounted on fatigue tester base On body (6), the enforcement pressure of the vibration pressure head (1) for carrying out testing fatigue acts on the flange fillet part of partition part (4) Position (7), the flange fillet position of partition part (4) coincide with the shape of the contact surface of vibration pressure head (1).
2. use the method that device described in claim 1 carries out vibrationfatigue test to partition part, it is characterised in that: the method Step be:
Step one, before testing begins, creates partition part (4) vibrating fatigue construction geometry model, institute in ANSYS software Stating finite element analysis software ANSYS is that multipurpose Finite element arithmetic machine designs program, can be used to solve structure, fluid, electricity The problem such as magnetic field, collision, can be used for different industrial circles, and software mainly includes three parts: pre-processing module, analytical calculation Module and post-processing module.Pre-processing module provides powerful solid modelling and stress and strain model instrument, and user can be easily Structure FEM (finite element) model；Analytical calculation module includes the coupling analysis of structural analysis, hydrodynamic analysis and multiple physical field, Can simulate the interaction of multiple physical medium, result of calculation can be shown with chart, curve form or export by post-processing module. In ANSYS software, set partition part vibration fatigue test boundary condition, the boundary condition of described vibration fatigue test be every The material properties of sheet part (4), deformation displacement；
Step 2, submission computing solve, the number that after terminating, acquisition partition part (4) internal stress, load change with deformation displacement Value, then further according to the stress obtained by partition part (4) yield strength measured, tensile strength numerical value and simulation trial, change Morpheme is moved, load value is compared, and selects the stress obtained by yield strength, tensile strength numerical value and simulation trial, deforming position The load value that shifting value is corresponding time suitable, determines Fatigue Testing Loads scope during actual tests；
Step 3, being installed on fatigue tester matrix (6) by fixed pedestal (5), partition part (4) is assemblied in fixed pedestal (5) on, tabletting (3) is placed on partition part (4), tightens clamping screw (2), and vibration pressure head (1) is installed on fatigue tester Walking beam (8) on, debugging loading equipemtn make vibration pressure head (1) contact partition part (4) flange fillet position (7), set The Fatigue Testing Loads scope determined by step 2, starts fatigue tester, starts test；
Step 4, at interval of 2～4h, stop fatigue tester, observe the surface at flange fillet position (7) of partition part (4) Situation, if there being crackle to produce, then stops test, then uses a new partition part (4), restart test from step 3, If not finding crackle, then protracted test to vibration number stops after reaching to set numerical value.
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Cited By (4)

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CN107967552A (en) * 2017-10-31 2018-04-27 北京精密机电控制设备研究所 Servo valve develops whole process error protection system
CN110044585A (en) * 2019-03-05 2019-07-23 中国航发北京航空材料研究院 A kind of spherical shape partition fatigue experimental device and test method
CN110654569A (en) * 2019-09-29 2020-01-07 中国直升机设计研究所 Load simulation simplification method for helicopter tail section fatigue test
CN111767614A (en) * 2020-05-20 2020-10-13 中国石油天然气集团有限公司 Evaluation and analysis method for vibration fatigue failure test of air-tight seal special thread

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Publication number Priority date Publication date Assignee Title
CN107967552A (en) * 2017-10-31 2018-04-27 北京精密机电控制设备研究所 Servo valve develops whole process error protection system
CN110044585A (en) * 2019-03-05 2019-07-23 中国航发北京航空材料研究院 A kind of spherical shape partition fatigue experimental device and test method
CN110044585B (en) * 2019-03-05 2021-08-03 中国航发北京航空材料研究院 Spherical spacer fatigue test device and test method
CN110654569A (en) * 2019-09-29 2020-01-07 中国直升机设计研究所 Load simulation simplification method for helicopter tail section fatigue test
CN111767614A (en) * 2020-05-20 2020-10-13 中国石油天然气集团有限公司 Evaluation and analysis method for vibration fatigue failure test of air-tight seal special thread
CN111767614B (en) * 2020-05-20 2024-05-28 中国石油天然气集团有限公司 Method for evaluating and analyzing vibration fatigue failure test of special air seal thread

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