Fatigue of Aircraft Structures最新文献_第9页

Preparation of Samples used in Fatigue Testing of Aircraft Materials 飞机材料疲劳试验用试样的制备

Fatigue of Aircraft Structures Pub Date : 2015-12-01 DOI: 10.1515/fas-2015-0011

W. Manaj, Wojciech Wronicz, Andrzej Michałowski

{"title":"Preparation of Samples used in Fatigue Testing of Aircraft Materials","authors":"W. Manaj, Wojciech Wronicz, Andrzej Michałowski","doi":"10.1515/fas-2015-0011","DOIUrl":"https://doi.org/10.1515/fas-2015-0011","url":null,"abstract":"Abstract The application of a new type of alloy requires the evaluation of its properties, which is typically achieved with destructive methods. For this purpose, among others, static and fatigue mechanical tests are performed. Tests are performed on standardized samples in a way which reflects the level of stress occurring in real elements. These tests should limit random errors associated with sample preparation. For this reason the proper preparation of samples is crucial, not only in terms of their geometric dimensions but also in terms of the residual stress level. A sample preparation process was developed, involving checking samples’ surface for cracks, scratches, roughness, and the state of stress. The measurements are performed with nondestructive methods so as not to affect the proceeding research. In this study, the residual stress and features of a mechanically prepared surface were characterized. The specimens were subjected to various surface finishes mainly, lathe turning and grinding surface conditions. The effects of residual surface stress (measured by XRD) were studied after machining and polishing.","PeriodicalId":37629,"journal":{"name":"Fatigue of Aircraft Structures","volume":"2015 1","pages":"66 - 68"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/fas-2015-0011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67370759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conception of New Air Target SZERSZEŃ-2 新型空中目标的构想SZERSZEŃ-2

Fatigue of Aircraft Structures Pub Date : 2015-12-01 DOI: 10.1515/fas-2015-0008

P. Samoraj, Michał Sałaciński

引用次数: 1

Predictive Models for Transient Loads of the Vertical Stabilizer of an Aircraft developed using Canonican Correlation Analision 应用正则相关分析建立了飞机垂直尾翼瞬态载荷预测模型

Fatigue of Aircraft Structures Pub Date : 2015-12-01 DOI: 10.1515/fas-2015-0007

M. Dziendzikowski, Wojciech Zieliński, Łukasz Obrycki, M. Woch, P. Synaszko, K. Dragan, A. Leski

引用次数: 0

The Verification of the Technical Conditions of a Combat-Trainer Jet’s Airframe 某型战斗教练机机体技术条件的验证

Fatigue of Aircraft Structures Pub Date : 2015-01-01 DOI: 10.1515/fas-2015-0006

M. Kurdelski, M. Stefaniuk, Wojciech Zieliński, Tomasz Bartoszek

{"title":"The Verification of the Technical Conditions of a Combat-Trainer Jet’s Airframe","authors":"M. Kurdelski, M. Stefaniuk, Wojciech Zieliński, Tomasz Bartoszek","doi":"10.1515/fas-2015-0006","DOIUrl":"https://doi.org/10.1515/fas-2015-0006","url":null,"abstract":"Abstract The combat-trainer jet aircraft is an important element in the process of fighter pilot training. This type of aircraft provides a means of transition from basic training on low-speed propeller trainers to piloting high-speed and highly maneuverable fighter aircraft. Nowadays, in Poland, the PZL TS-11 “ISKRA” jet trainers, designed in 1960s, are employed for training purposes. Because of financial considerations this trainer hasn’t been yet replaced by modern aircraft that conforms to current specifications and needs. As is the case with other aircraft in service of the PLAF, the TS-11 fleet has a large reserve of remaining Hourly Service Life (HSL). This opens an opportunity to extend the Calendar Service Life (CSL), so as it matches the HSL. To this end, a series of technical and research activities needed to be undertaken. The Air Force Institute of Technology is conducting the necessary verification of airframe structural conditions in cooperation with the Military Aviation Works No. 1 J.S.C. (branch in Dęblin) responsible for the overhaul and repair operations. The AFIT’s activities in this program include: deformation analysis of the selected surface areas of the wing and the fuselage; assessment of hidden corrosion in riveted joints; non-destructive testing of selected riveted joints. This paper describes the deformation analysis. As of today, the first stage of the deformation inspection has been completed. At this stage, baseline surface measurements were obtained. Further inspections shall be performed cyclically. The future measurements will be used to establish the areas that deform due to the aircraft operation.","PeriodicalId":37629,"journal":{"name":"Fatigue of Aircraft Structures","volume":"2015 1","pages":"34 - 40"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67370926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Composite Aerospace Structure Monitoring with use of Integrated Sensors 使用集成传感器的复合材料航空航天结构监测

Fatigue of Aircraft Structures Pub Date : 2015-01-01 DOI: 10.1515/fas-2015-0002

K. Dragan, M. Dziendzikowski, A. Kurnyta, Michał Sałaciński, S. Kłysz, A. Leski

引用次数: 0

The Application of Acoustic Anisotropy to Evaluation of Material Properties 声学各向异性在材料性能评价中的应用

Fatigue of Aircraft Structures Pub Date : 2015-01-01 DOI: 10.1515/fas-2015-0001

J. Krysztofik, W. Manaj, G. Socha

{"title":"The Application of Acoustic Anisotropy to Evaluation of Material Properties","authors":"J. Krysztofik, W. Manaj, G. Socha","doi":"10.1515/fas-2015-0001","DOIUrl":"https://doi.org/10.1515/fas-2015-0001","url":null,"abstract":"Abstract Structural properties of materials change under stress, temperature and work environment. These changes are generally unfavorable. They cause a reduction in strength of materials. This has an impact on the safety and service life of machines and constructions. In the chemical and petrochemical industry the destruction of a structure can be activated by chemical substances. In the energy industry, a key element in assisting the destruction is temperature. In aviation, the typical cause of damage is the process of fatigue. Regardless of the differences regarding/concerning the mechanisms of degradation, typical of the sectors of industry, the end result is the emergence of microvoids and microcracks in the material. In the final phase of the process, dominant cracks are formed. The term of measure of material damage, introduced by Kachanov and Rabotnow, can be effectively used also when considering the impact of microdamages on measurable macroscopic acoustic quantities. A damage parameter proposed by Johnson allows to correlate changes in acoustic birefringence of the material with the parameter describing the degree of damage. In this article the authors presented the nondestructive tests results concerning Inconel 718 alloy subjected to damage caused by plastic deformation. This paper focuses on the evaluation of acoustic properties in relation to the degradation of the materials tested.","PeriodicalId":37629,"journal":{"name":"Fatigue of Aircraft Structures","volume":"2015 1","pages":"11 - 5"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/fas-2015-0001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67370639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Effect of Environmental Flight Conditions on Damage Propagation in Composite Sandwich Structure 环境飞行条件对复合材料夹层结构损伤扩展的影响

Fatigue of Aircraft Structures Pub Date : 2015-01-01 DOI: 10.1515/fas-2015-0004

P. Synaszko, Michał Sałaciński, Ł. Kornas

{"title":"The Effect of Environmental Flight Conditions on Damage Propagation in Composite Sandwich Structure","authors":"P. Synaszko, Michał Sałaciński, Ł. Kornas","doi":"10.1515/fas-2015-0004","DOIUrl":"https://doi.org/10.1515/fas-2015-0004","url":null,"abstract":"Abstract The aim of the study was to determine the traceability of damage growth caused by inclusions of water in the composite sandwich structure. It was assumed that as a result of temperature changes during the flight and accompanying phase transformation, the zone containing water inclusions increases. The growth is caused by the destruction (mainly the tearing of walls) of the core. As part of the work, this assumption was verified experimentally. For the experiment to be successful it was necessary to simulate actual flight conditions. The simulation involved inducing phase transformations of water in the core cell as a function of time and temperature. Before and after the experiments the non-destructive tests using pulsed thermography were performed. The test results revealed an increase in the number of cells occupied by water. Adequate specimens were designed and manufactured. The study showed that cyclical changes in temperature affected the propagation of water in core sandwich structures. Further, it was found that the increase in the surface area of water-containing inclusions could be monitored using thermographic techniques.","PeriodicalId":37629,"journal":{"name":"Fatigue of Aircraft Structures","volume":"2015 1","pages":"24 - 27"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67371084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Possibile Applications of Magnetic Microwires in Aviation 磁性微线在航空领域的可能应用

Fatigue of Aircraft Structures Pub Date : 2014-08-21 DOI: 10.2478/fas-2013-0002

K. Draganová, J. Blazek, D. Praslička, F. Kmec

引用次数: 4

Advanced Magnetic Materials for Aeronautics 航空先进磁性材料

Fatigue of Aircraft Structures Pub Date : 2014-08-21 DOI: 10.2478/fas-2013-0006

M. Šmelko, D. Praslička, J. Blazek

{"title":"Advanced Magnetic Materials for Aeronautics","authors":"M. Šmelko, D. Praslička, J. Blazek","doi":"10.2478/fas-2013-0006","DOIUrl":"https://doi.org/10.2478/fas-2013-0006","url":null,"abstract":"Abstract In the field of magnetic sensors, magnetic microwires with positive magnetostriction are the materials of the future. Their mechanical and magnetic properties render them ideal materials for applications in aeronautics. A single microwire with a 40 jj.m diameter and a length of 10 mm is capable of capturing information about tensile stresses, magnetic fields, temperature and distance. This information is carried by a parameter called the Switching Field, HSW, which is specific for different types of microwire. Numerous physical qualities affect the HSW and through sensing of HSW, these qualities may be quantified. (A number of physical qualities affecting HSW can be sensed and quantified by means of a contactless induction method.) What distinguishes the system developed by the present authors from other measuring systems based on magnetic microwires is the positioning of a microwire outside the coil system. Thanks to this improvement it is possible to use microwires embedded directly in the construction material. Small dimensions microwires do not damage the structure of the construction material. The absence of a galvanic connection makes this technology even more interesting compared with traditional forge gauges. Offering the possibility of the simultaneous measuring of four parameters, this technology can be used in a wide range of aviation applications. Measurements of an external magnetic field can be usedfor the navigation and stabilization of an aerial vehicle. Tensile stress and distance measuring can be helpful to understand some processes occurring under the surface of the construction material and also to perform fatigue monitoring or structure load monitoring. Another big advantage of magnetic microwires is the low price. Just 1 gram of base material is sufficient to prepare about 40 km of microwire. All these features combine to offer us a material ideal for Smart Sensors, possibly available for use in the near future.","PeriodicalId":37629,"journal":{"name":"Fatigue of Aircraft Structures","volume":"2013 1","pages":"60 - 65"},"PeriodicalIF":0.0,"publicationDate":"2014-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69203602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An On-Line Multiway Approach to In-Situ NDI Looking at the PZL-130TCII PZL-130TCII的在线多路原位无损检测方法

Fatigue of Aircraft Structures Pub Date : 2014-08-21 DOI: 10.2478/fas-2013-0001

K. Dragan, M. Dziendzikowski, A. Kurnyta, Adam Latoszek, A. Leski, S. Kłysz

引用次数: 1