NEW CHALLENGES IN ABRASIVE WATER JET MACHINING by CATALINA CIOFU, CATALIN TAMPU, EUGEN HERGHELEGIU, COSMIN ALEXANDRU IANCU, GHEORGHE BRABIE

“… Abrasive water jet machining (AWJM) is one of the most important method used in cutting different types of materials: alloy sheet, marble, glass, rocks. This process is used in the aeronautic, automotive, metallurgy industries and even in some art techniques and textile industry. …”
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Cracking directions in multiaxial low cycle fatigue at high and room temperatures by Masao Sakane, Takamoto Itoh

“…This paper overviews cracking directions in tension-torsion low cycle fatigue of low alloy steels and nickel base superalloys. Two types of cracking directions in these materials, maximum shear direction and maximum principal direction, are discussed in relation with strain multiaxiality and an existence of notch and precrack. …”
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Analysis of the influence of reinforcements on the microstructure and mechanical characterization of the Al-Flyash composites by Milind K. Wasekar, Mohan P. Khond

“…The composite with aluminum 6061 alloy as the matrix and flyash as the reinforcement, with different weight fractions, is investigated to study its microstructure and the tensile strength. …”
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Experiment and Analysis of Gearbox Shell Vibration Modal based on DASP by Ma Weijin, Zhang Lin, Zhang Jiping, Huang Bincheng, Ge Yumin

“…Through the experiment of the vibration modal of gearbox shell,the gearbox shell vibration state is analyzed and the stability of its operation is evaluated.By using DASP（Data Acquisition& Signal Processing）software,the vibration modal of the HW25505 TCL type aluminum alloy gearbox shell is tested.By the contrast between ERA method and PloyLSCF method,the reliable 1⁴order of frequency and damping are obtained,and thus the vibration mode analysis is carried out.By using modal correlation matrix of modal to test and verify,through the comparison with calculating modal,the validity and reliability are proved.Applied DASP to vibration modal test of gearbox shell,not only the gearbox shell high order frequency,damping,vibration mode,and vibration condition can be acquired,but also the vibration problem of similar shell gearbox in operation can be solved,The theoritical basis for the improvement of the gearbox shell structure characteristics and the fault diagnosis of gearbox shell are provided,and had better promotion value in engineering practice.…”
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3D Analyses of crack propagation in torsion by D. Shiozawa, Serrano Munoz, S. Dancette, C. Verdu, J. Lachambre, J.-Y. Buffiere

“…The initiation and propagation of fatigue cracks during cyclic torsion loading was studied in a cast Al alloy (A357) with a relatively large (~500 ?m) grain size. 2D observations, revealed that multi site crack initiation occur on the {111} slip planes exhibiting the highest slip activity (iso-strain Taylor analysis), preferentially on planes nearly perpendicular to the sample axis. …”
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EXPERIMENTAL STUDY ON INFLUENCE FACTORS OF DYNAMIC FRACTURE TOUGHNESS SIZE BASED ON CT SAMPLE by ZOU GuangPing, WU SongYang, YAN AnShi, LI YinChen, ZHANG ZhiJun, CHANG ZhongLiang

“…In order to study the influence of compact tensile (CT) specimen size on dynamic fracture toughness test, a dynamic fracture test of 2112T4 aluminium alloy CT was carried out based on a split Hopkinson tie bar (SHTB) device. …”
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PARAMETER ESTIMATION AND CONFIDENCE LIMIT CALCUALTION METHOD OF THREE-PARAMETER WEIBULL DISTRIBUTION by ZHANG JianFeng, XU Fang, ZHANG Yan, HUANG XiaoBo, JIA ZhuoHan

“…A correlation-regression method was proposed to solve the problem of low accuracy of parameter estimation and confidence limit calculation of the three-parameter Weibull distribution.The method was combined by the correlation coefficient method （Fu method） and the nonlinear regression method which makes full use of the convenience of Fu method and the excellent estimation effect of the nonlinear regression method in estimating the three-parameter Weibull distribution.In order to verify the effectiveness of the proposed method，the correlation-regression method，Fu method and Method combining maximum likelihood estimation and empirical formulae (referred to as the “MMPDS method”） were applied to the parameter estimation and confidence limit calculation of the data distribution of a certain alloy strength value with different sample sizes，and calculation consequence of different methods was compared and analyzed.Results show that the correlation-regression method has highest parameter estimation and confidence limit calculation accuracy among the above methods.When the sample size is less than 100，its advantage is more significant，and it can accurately calculate the parameters and confidence limits of the Weibull distribution.…”
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Effect of Exfoliation Corrosion on the Mechanical Properties of Friction Stir Spot Welded 2024-T3 AA Joints by Ramadhan H. Gardi, Abdulkader kadauw, Bertrand Hanschel

“…This study aims to detect the impact of preexfoliation corrosion on the efficiency of 2 mm thick 2024-T3 aluminum alloy friction stir spot welded (FSSW) joints. Five specimens of FSSW joints, welded with 620 r·min−1 rotational speed and a dwell time of 10 seconds, were immersed in an exfoliation corrosion solution for five different times: 10 h, 20 h, 30 h, 40 h, and 50 h. …”
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STRUCTURAL DESIGN AND OPTIMIZATION OF FUNCTIONALLY GRADED MATERIAL ENERGY ABSORBING BOX by ZHANG QingYong, WANG YuChao, WANG Hui

“…The structure design of traditional energy absorbing box has some shorteomings, such as failure to realize stable and orderly folding and collapsing during collision and poor energy-absorbing ability in unit mass, which limits the improvement of automobile safety performanee. The aluminum alloy was added into the traditional 316L stainless steel composition to form afunetionally graded material (FCM) structure of the energy obsorbing box, and the cross section was optimized to be a stick insect tibia cross-sectional structure. …”
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Application of Digital Image Correlation (DIC) in resonance machines for measuring fatigue crack growth by P. Lorenzino, G. Beretta, A. Navarro

“…Preliminary results on monitoring cracks with this technique on flat specimens with cylindrical notches of 1050 aluminium alloy are also presented.…”
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Parameter Study and Economic Efficiency Optimization for Laser Cladding with Wide-Band Fiber Laser by Bin Hu, Jianhai Han, Junhua Wang

“…With the aim of investigating the cladding geometry characteristics by a wide-band fiber laser with coaxial rectangular nozzle, and optimizing the powder efficiency and deposition speed for economy efficiency, Fe-based alloy powder was deposited on AISI 1045 substrate by a 3000 W fiber laser in this study. …”
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Supervised machine learning classification algorithms for detection of fracture location in dissimilar friction stir welded joints by Akshansh Mishra, Apoorv Vats

“…Decision Trees algorithm, K- Nearest Neighbors (KNN) algorithm, Support Vector Machines (SVM) algorithm, and Ada Boost algorithm were subjected to the given dataset for the determination of fracture location in dissimilar Friction Stir Welded AA6061-T651 and AA7075-T651 alloy. In the given dataset, rotational speed (RPM), welding speed (mm/min), pin profile, and axial force (kN) were the input parameters while Fracture location is the output parameter. …”
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2-Hydroxy-5-methylbenzophenone oxime(HMBO) as an Analytical Reagent for Gravimetric Determination of Cu(II) by S. K. Shingadia, K. K. Desai

“…The reagent can be used for the analysis of brass and alloy.…”
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EXPERIMENT AND SIMULATION RESEARCH OF THE OPTIMUM INTERFERENCE OF HI-LOCK ASSEMBLY by XIE JieDong, CHEN Guo, ZENG XinLiang, SHU MaoSheng, LUO Yun, GAO Hong, ZHENG QiHui

“…Fatigue gain mechanism of high lock bolt interference on the base of different layer thickness is researched,through the method of combining the fatigue test and finite element simulation in a certain type of aircraft aluminum alloy structure. First, the fatigue test was designed and tested, and the results were analyzed by S-N curve, detail fatigue rating（DFR） and fracture location. …”
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A METHOD MEASURING FRACTURE PARAMETERS OF BRITTLE MATERIAL USING U-NOTCHES by LIU XiaoMei, BIAN YongMing, LIANG YongCheng

“…The three point bending and tensile experiments in related references of PMMA and aluminum alloy specimens with single-edged U-notch and graphite tensile plates with central U-notch were verified. …”
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The problem of assessing endurance of hull elements of low-flying orbital objects by I. Yu. Lesnyak, Z. N. Sokolovsky, M. A. Fedorova, S. V. Gavrilenko, A. Yu. Kazakov, V. E. Konovalov

“…The difference between the calculated and actual endurance of the AMg6 alloy is within the natural range of 20 % during fatigue testing.…”
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STUDY ON QUASI-STATIC СОMPRESSIVE STRESS OF REINFORCED HONEYCOMBWITH THEORETICS, NUMERICAL SIMULATION AND EXPERIMENT by XU Peng, XIA DongWei, WANG ChengQiang, SONG Yang

“…Thirdly, the aluminum alloy 5052H18 with a wall thickness of 0. 15 mm and a side length of 2. 5 mm is selected, and the honeycomb simulation model is established by Ls-Dyna to obtain the average stress. …”
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Numerical analysis and verification of residual stress in T joint of S355 steel by Wang Xiangming, Guo Erfu

“…In this study, S355 low alloy steel was used as test material, and the thermal-mechanical coupling characteristics of multi-layer welding were combined with SYSWELD finite element software to calculate the residual welding stress of T joint. …”
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Inverse problems with the digital image correlation: approach and applications by E. Sgambitterra, F. Niccoli

“…Three different case studies are considered: 1) estimation of the stress intensity factor in fracture mechanics problems, 2) estimation of the elastic properties of a material by the Brazilian tests, 3) estimation of the contact pressure generated by thermally activated shape memory alloy (SMA) rings used for pipe coupling. The reliability and the accuracy of the method is demonstrated through systematic comparisons of the results with conventional techniques in experimental mechanics.…”
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DESIGN OF A HIGH-SENSITIVITY DEVICE FOR DETECTING WEAK MAGNETIC FIELDS by Trong Vinh Dao, Dang Khanh Le, Minh Huy Le, Dang Khoa Nguyen, Van Su Luong

“…The core material consists of Metglas ribbon, an amorphous alloy with high permeability, negligible hysteresis, and a high saturated magnetic field. …”
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