CN109855961A - A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor - Google Patents

A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor Download PDF

Info

Publication number
CN109855961A
CN109855961A CN201711245666.3A CN201711245666A CN109855961A CN 109855961 A CN109855961 A CN 109855961A CN 201711245666 A CN201711245666 A CN 201711245666A CN 109855961 A CN109855961 A CN 109855961A
Authority
CN
China
Prior art keywords
emas
pressure head
engineering
middle low
low strain
Prior art date
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.)
Pending
Application number
CN201711245666.3A
Other languages
Chinese (zh)
Inventor
白春玉
刘小川
惠旭龙
舒挽
葛宇静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AVIC Aircraft Strength Research Institute
Original Assignee
AVIC Aircraft Strength Research Institute
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 AVIC Aircraft Strength Research Institute filed Critical AVIC Aircraft Strength Research Institute
Priority to CN201711245666.3A priority Critical patent/CN109855961A/en
Publication of CN109855961A publication Critical patent/CN109855961A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention proposes a kind of middle low strain dynamic rate dynamic compression properties methods of engineering arrestor, it can get mechanical characteristic of the EMAS under the load of middle low strain dynamic rate based on this method, experimentation is similar with failure mode of the EMAS in practical engineering application under wheel rolling, and EMAS material can be obtained in stretch section, platform section and the compacting complete data of section three phases, therefore, the material parameter obtained based on the present invention can more accurately characterize the dynamic mechanical of EMAS material.

Description

A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor
Technical field
The invention belongs to the tests of the dynamic mechanical of material and characterization technique field, are related to a kind of engineering arrestor Middle low strain dynamic rate dynamic compression properties method.
Background technique
Engineering material arresting system (Engineered Material Arresting System, abbreviation EMAS) can mention For a kind of effective and practicable runway safety zone improved method, it is laid with EMAS in the safety zone of airfield runway end, The risk after aircraft guns off the runway can be reduced, protects the safety of occupant and aircraft to greatest extent.EMAS blocks the principle of aircraft It is exactly that the kinetic energy that EMAS material absorbs aircraft is rolled by undercarriage wheel after aircraft guns off the runway, makes aircraft in safety Under the premise of gradually slow down and eventually stop at scheduled distance.During wheel and EMAS material effects, EMAS material Process by rolling failure is dynamic failure, and the strain rate range of failure procedure EMAS material is generally less than 1000/s, is belonged to In typical middle low strain dynamic rate range, dynamic mechanical data are to carry out EMAS to design necessary data input.
Under Dynamic Loading, material generally shows certain strain rate dependency, i.e. mentioning with load strain rate Height, the mechanical property of material will show to differ markedly from the situation of semi-static load, due in different strain rate ranges It is interior, it determines that the physical mechanism of material failure is also different, different experimental test procedures need to be used.Exist for EMAS system Undercarriage wheel dynamic rolling failure for, EMAS material will be not only compressed to failure by wheel, will also further by It is compressed into powder, and until powder is compacted, therefore, traditional dynamic compression experiments cannot characterize EMAS material considered repealed Physical process.
Summary of the invention
Goal of the invention:
The present invention provides a kind of middle low strain dynamic rate dynamic compression properties methods of engineering arrestor, for grinding Different load strain rates are studied carefully to the affecting laws of EMAS characteristic of material mechanics, are compared traditional dynamic compression experiments and are compared, this hair The method of bright proposition can more accurately characterize the actual failure procedure of EMAS material and obtain corresponding material parameter.
Technical solution: a kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor, feature exist In, comprising the following steps:
Step 1: starting material experiment-machine carries out preheating and system debug to experimental machine, it is ensured that experimental machine works normally;
Step 2: according to testing requirement, dedicated pressure head being mounted on the operating bar of experimental machine;
Step 3: regulation experiment machine beam height makes to have between pressure head and material and realizes that operating bar is loaded into mesh enough Mark the priming stroke of speed;
Step 4: EMAS cell cube material being mounted on pressing plate, and enclosing is carried out to its surrounding with coaming plate;
Step 5: setting experiment test parameter and acquisition parameter;
Step 6: starting experimental machine operating bar triggers test macro before pressure head and EMAS material;
Step 7: pressure head accelerates to target velocity and is pressed into EMAS cell cube;
Step 8: load data and ram travel data storage to acquisition;
Step 9: analysis experimental data checks whether EMAS material has crackle generation;
Step 9: single experiment terminates, and removes EMAS cell cube material;
Step 10: returning to step 4, carry out new working condition experimenting.
Long stroke of the pressure head in EMAS material is not less than the 80% of material original height.
Mechanism constant airspeed of the pressure head in EMAS cell cube.
Beneficial effect
The present invention provides a kind of middle low strain dynamic rate dynamic compression properties methods of engineering arrestor, for grinding Study carefully different load strain rates to the affecting laws of EMAS characteristic of material mechanics, for EMAS block specificity analysis and design provides The material dynamic mechanical performance data input on basis, compares traditional dynamic compression experiments and compares, method energy proposed by the present invention It more accurately characterizes the actual failure procedure of EMAS material and obtains corresponding material parameter, and the present invention has operability By force, the advantages that test method is easy.
Specific embodiment
Technical solution of the present invention embodiment is described in detail below.
In specific implementation process of the present invention, pressure head, operating bar and EMAS cell cube material enclosing dress are designed and processed first It sets, EMAS cell cube is laid on experimental machine pressing plate, and surrounding enclosing is carried out to EMAS cell cube, prevent in experimentation Since the dynamic impulsion of pressure head causes cell cube to crack, the width of EMAS cell cube should be 5~8 times of pressure head diameter D, and press Long stroke of the head in EMAS material is not less than the 80% of material original height, and experimentation need to keep pressure head mono- in EMAS The mechanism constant airspeed of first body, with guarantee test obtain EMAS cell cube stress-strain data include stretch section, Platform section and compacting section three phases, while being compacted the load upper limit that load is no more than experimental machine, it is ensured that experiment safety.It is real The Resistance Value and actuating travel for needing testing pressure head during EMAS cell cube dynamic action are tested, matching obtains material in difference Load-deformation curve under loading velocity.
Specific experiment steps flow chart is as follows:
Step 1: starting material experiment-machine carries out preheating and system debug to experimental machine, it is ensured that experimental machine works normally;
Step 2: according to testing requirement, pressure head being mounted on the operating bar of experimental machine;
Step 3: regulation experiment machine beam height makes to have between pressure head and material and realizes that operating bar is loaded into mesh enough Mark the priming stroke of speed;
Step 4: EMAS cell cube material being mounted on pressing plate, and enclosing is carried out to its surrounding with coaming plate;
Step 5: setting experiment test parameter and acquisition parameter;
Step 6: starting experimental machine operating bar triggers test macro before pressure head and EMAS material;
Step 7: pressure head accelerates to target velocity and is pressed into EMAS cell cube;
Step 8: load data and ram travel data storage to acquisition;
Step 9: analysis experimental data checks whether EMAS material has crackle generation;
Step 9: single experiment terminates, and removes EMAS cell cube material;
Step 10: returning to step 4, carry out new working condition experimenting.
Test acceptable criterion are as follows:
1. after compression experiment, visual inspection EMAS material flawless is generated;
2. long stroke of the pressure head in EMAS material is not less than the 80% of material original height
3. obtaining the complete load-time graph of experimentation, displacement-time curve, data processing obtains stress- Strain data includes stretch section, platform section and compacting section three phases.

Claims (3)

1. a kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor, which is characterized in that including following step It is rapid:
Step 1: starting material experiment-machine carries out preheating and system debug to experimental machine, it is ensured that experimental machine works normally;
Step 2: according to testing requirement, dedicated pressure head being mounted on the operating bar of experimental machine;
Step 3: regulation experiment machine beam height makes to have between pressure head and material and realizes that operating bar is loaded into target velocity enough Priming stroke;
Step 4: EMAS cell cube material being mounted on pressing plate, and enclosing is carried out to its surrounding with coaming plate;
Step 5: setting experiment test parameter and acquisition parameter;
Step 6: starting experimental machine operating bar triggers test macro before pressure head and EMAS material;
Step 7: pressure head accelerates to target velocity and is pressed into EMAS cell cube;
Step 8: load data and ram travel data storage to acquisition;
Step 9: analysis experimental data checks whether EMAS material has crackle generation;
Step 9: single experiment terminates, and removes EMAS cell cube material;
Step 10: returning to step 4, carry out new working condition experimenting.
2. a kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor according to claim 1, It is characterized in that, long stroke of the pressure head in EMAS material is not less than the 80% of material original height.
3. a kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor according to claim 1, It is characterized in that, mechanism constant airspeed of the pressure head in EMAS cell cube.
CN201711245666.3A 2017-11-30 2017-11-30 A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor Pending CN109855961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711245666.3A CN109855961A (en) 2017-11-30 2017-11-30 A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711245666.3A CN109855961A (en) 2017-11-30 2017-11-30 A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor

Publications (1)

Publication Number Publication Date
CN109855961A true CN109855961A (en) 2019-06-07

Family

ID=66889462

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711245666.3A Pending CN109855961A (en) 2017-11-30 2017-11-30 A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor

Country Status (1)

Country Link
CN (1) CN109855961A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110129295A1 (en) * 2007-10-30 2011-06-02 Omnitek Partners Llc Deployable Collapsible Engineered Material Systems For Runway Safety
CN102759482A (en) * 2012-07-02 2012-10-31 中国民航科学技术研究院 Mechanical performance testing method for special foam material of EMAS (Engineered Material Arresting System)
CN203881614U (en) * 2014-04-01 2014-10-15 长安大学 All-in-one machine for geo-technical tension-compression strength test
CN104614226A (en) * 2015-01-05 2015-05-13 王鹏 Trail-type reciprocating circulating aircraft load simulating test device and application method thereof
CA2985374A1 (en) * 2015-05-18 2016-11-24 Engineered Arresting Systems Corporation Suspended layered energy absorbing material for vehicle arresting systems
CN106989995A (en) * 2017-06-15 2017-07-28 东华理工大学 A kind of adjustable Rock And Soil of lateral spacing condition vertically compresses ancillary test device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110129295A1 (en) * 2007-10-30 2011-06-02 Omnitek Partners Llc Deployable Collapsible Engineered Material Systems For Runway Safety
CN102759482A (en) * 2012-07-02 2012-10-31 中国民航科学技术研究院 Mechanical performance testing method for special foam material of EMAS (Engineered Material Arresting System)
CN203881614U (en) * 2014-04-01 2014-10-15 长安大学 All-in-one machine for geo-technical tension-compression strength test
CN104614226A (en) * 2015-01-05 2015-05-13 王鹏 Trail-type reciprocating circulating aircraft load simulating test device and application method thereof
CA2985374A1 (en) * 2015-05-18 2016-11-24 Engineered Arresting Systems Corporation Suspended layered energy absorbing material for vehicle arresting systems
CN106989995A (en) * 2017-06-15 2017-07-28 东华理工大学 A kind of adjustable Rock And Soil of lateral spacing condition vertically compresses ancillary test device

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ZHIPING DENG: "Compressive behavior of the cellular utilizing millimeter-size spherical SAP under high strain-rate loading", 《CONSTRUCTION & BUILDING MATERIALS》 *
伍土华: "泡沫填充混凝土动静态压缩与机轮贯入行为分析", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅱ辑》 *
惠旭龙: "2A16铝合金中应变率力学性能研究", 《振动与冲击》 *
肖帆: "泡沫填充混凝土冲击压剪力学性能实验研究", 《中国优秀博硕士学位论文全文数据库(硕士)基础科学辑》 *
韩李斌: "泡沫混凝土动态力学性能及破坏形式", 《宁波大学学报(理工版)》 *

Similar Documents

Publication Publication Date Title
Guo et al. Dynamic fracture behavior and fracture toughness analysis of rock-concrete bi-material with interface crack at different impact angles
CN106475500B (en) A kind of Heavy Pan Forgings forging technology
Zhao et al. Mechanical behavior of sandstone during post-peak cyclic loading and unloading under hydromechanical coupling
Li et al. Improved high cycle fatigue properties of a new magnesium alloy
CN108362638A (en) A kind of arresting system dynamic energy absorption characteristics experimental provision and experimental method
CN102759482B (en) Mechanical performance testing method for special foam material of EMAS (Engineered Material Arresting System)
CN109855961A (en) A kind of middle low strain dynamic rate dynamic compression properties method of engineering arrestor
Jonsén et al. Modelling the non-linear elastic behaviour and fracture of metal powder compacts
CN111579378A (en) Device for monitoring surface temperature change during loading and cracking of gas-containing coal rock
CN106525365A (en) Aeroengine wheel disc crack prefabrication test system and test method
CN109323936A (en) Special woven material impact tensile test apparatus
Ji et al. Dent-repaired fatigue performance and life prediction of thin sheet specimens under coupled multi-stage damage with impact and pre-fatigue
CN105628515B (en) A kind of lower asphalt pavement high-temperature anti-shear characteristic evaluation method of aircraft multiple-wheel load effect
CN103412096A (en) Multi-parameter method for monitoring coal and gas outburst under condition of multi-field coupling
CN208239486U (en) A kind of telescopic rod convenient for carrying out partial discharge test to GIS device
Florek et al. Compression test evaluation method for aluminium foam parts of different alloys and densities
CN107764731B (en) A kind of material shot blasting test method
CN104764666B (en) Low-and high-frequency ballistics and the test integrated experimental bench of frequency synthesis
CN103412094A (en) Triaxial one-time coal and gas outburst test device
Bae et al. Evaluation of Dynamic Deformation Behaviors in Metallic Materials under High Strain-Rates Using Taylor Bar Impact Test
CN112730515A (en) Experimental device and method for coal seam roof rupture and electric explosion
Okano Development of a testing machine with a large tunnel lining model
CN206470132U (en) A kind of briquette strength tester
Shengchuan et al. Fatigue Strength and Residual Lifetime Assessment of Railway Axles Subjected to Foreign Object Damage
CN205826259U (en) Bump assay device under the influence of simulation tectonic stress

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190607

RJ01 Rejection of invention patent application after publication