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Fatigue Short Crack Growth and Mechanism of GH4133B Superalloy Used in Turbine Disk of Aero-Engine Zhao Rongguo1,a, Li Wei1,b, Jiang Yongzhou2,c, Luo Xiyan3,d, Li Junfei1,e, Li Qibang1,f, Liu Yafeng1,g, Yan Yi1,h 1College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China 2Department of Aviation Theory, Air Force Aviation University, Changchun 130022, China 3College of Resources & Environmental Science, Chongqing University, Chongqing 401331, China azhaorongguo@163.com, b389713727@qq.com, cjyz2003_0@sohu.com, dlxy82226@163.com, e252267371@qq.com, f532606169@qq.com, g592412488@qq.com, h891029657@qq.com Keywords: fatigue; short crack growth; stress ratio; fractrography; GH4133B superalloy Abstract.
This anomaly for short fatigue crack growth in metallic material has aroused researcher’s extensive attention, because there are no any inherent defects as called long cracks in an actual engineering component, but inevitably contains a variety of microdefects, and the short fatigue cracks primarily grow from microdefects existed on material’s surface or subsurface, including twin bands, grain boundaries and dislocation bands [3, 4].
Wang, Experimental study on creep-fatigue interaction behavior of GH4133B superalloy, Materials Science and Engineering: A 515 (2009): 183-189
Reed, Microstructure effects on high temperature fatigue crack initiation and short crack growth in turbine disc nickel-base superalloy Udimet 720Li, Materials Science and Engineering: A 448 (2007), 67-79
Elber, Fatigue crack closure under cyclic tension, Engineering Fracture Mechanics 2 (1970), 37-45.

Particle Flow Simulation for Large Diameter Squat Silos Eccentric Discharge Fang Yuan1, a, Chengying Dong2,b, Yaohui Song2,c , Songsong Zhang2,d 1 School of civil engineering and architecture Henan University of Technology, ZhengZhou, China 2Institute of Scientific and Engineering Computation, Henan University of Technology, Zhengzhou 450052, P.R.
Table 1　 The Column Number and The Corresponding Measuring Wall Height test point (m) 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.45 0.55 0.65 20一wall number 20 44 68 92 116 140 164 188 212 236 23一wall number 23 47 71 95 119 143 167 191 215 239 25一wall number 25 49 73 97 121 145 169 193 217 241 32一wall number 32 56 80 104 128 152 176 200 224 248 35一wall number 35 59 83 107 131 155 179 203 227 251 Table 2　 Simulation Model Main Parameters Wall Normal stiffness/Pa wall Tangential stiffness/Pa particle Normal stiffness /Pa particle Tangential stiffness /Pa Particles Friction coefficient Friction coefficient between wall and particle particle gravity density kg/m3 4×106 2×106 3×104 3×104 0.5 0.40 35000 Engineering Analysis The large diameter squat silos are generally for flat bottom.
Engineering Condition one——Open the eighth and ninth outlet, simulate eccentric unloading.
5, 6 respectively, as well as the resulting effect on the dynamic lateral pressures. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 20 40 60 80 100 120 Lateral Pressure (kPa) Measure height of storehouse mode（m） 20一Side Wall 23一Side Wall 25一Side Wall 32一Side Wall 35一Side Wall Static Pressure Fig. 4 The Biggest Dynamic Pressure of Each Side Wall with Discharge Port 0.08m 0 0.11 0.2 0.3 0.4 0.5 0.6 0.7 0 20 40 60 80 100 120 Lateral Pressure (kPa) Static pressure 20一Side Wall 23一Side Wall 25一Side Wall 32一Side Wall 35一Side Wall Measure height of storehouse mode（m） Fig. 5 The Biggest Dynamic Pressure of Each Side Wall with Discharge Port 0.1m 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 20 40 60 80 100 120 Lateral Pressure (kPa) Static lateral pressure 20一Side Wall 23一Side Wall 25一Side Wall 32一Side Wall 35一Side Wall Measure height of storehouse mode（m） Fig. 6 The Biggest Dynamic Pressure of Each Side Wall with Discharge Port 0.12m Engineering

Flight Management System for Unmanned Reusable Space Vehicle Atmospheric and Re-entry Trajectory Optimisation Subramanian Ramasamy1, Manoj Sangam2, Roberto Sabatini3,a* and Alessandro Gardi4 1,3,4 School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Melbourne, VIC 3000, Australia 2 Department of Aerospace Engineering, Cranfield University, Cranfield, United Kingdom aroberto.sabatini@rmit.edu.au Keywords: flight management system, unmanned reusable space vehicle, trajectory optimisation, re-entry trajectory planning Abstract.
Introduction Unmanned platforms are being increasingly adopted for both atmospheric and space applications despite the access to civil airspace remains currently restricted to segregated areas.
Gardi, Advanced Flight Management System for an Unmanned Reusable Space Vehicle, International Journal of Unmanned Systems Engineering, 1(3), pp. 48-67.(2013) DOI: 10.14323/ijuseng.2013.11 [10] R.
Shaid, Carrier-phase GNSS Attitude Determination and Control for Small UAV Applications, Journal of Aeronautics and Aerospace Engineering, 2(4). (2013)DOI: 10.4172/2168-9792.1000120 [11] R.
Gardi, A Low-cost Vision Based Navigation System for Small Size Unmanned Aerial Vehicle Applications, Journal of Aeronautics and Aerospace Engineering, 2(3). (2013)DOI: 10.4172/2168-9792.1000110 [12] S.

Kouretzis1, a, Daichao Sheng1,b and Dong Wang2,c 1ARC Centre of Excellence for Geotechnical Science and Engineering, Faculty of Engineering and Built Environment, The University of Newcastle, Australia 2Centre for Offshore Foundation Systems, The University of Western Australia aGeorgios.Kouretzis@newcastle.edu.au, bDaichao.Sheng@newcastle.edu.au, cDong.Wang@uwa.edu.au Keywords: cone penetration, sand, elastoplastic model, relative density, centrifuge tests.
Yi, Centrifuge and numerical modelling of sand compaction pile installation, Ph.D. thesis, Department of Civil Engineering, National University of Singapore, 2009
I: mathematical foundation and hypoelasticity, Journal of Engineering Mechanics ASCE, 112-EM9 (1986) 966-987
Report CUED/D-SOILS/TR256, Cambridge University Engineering Department, UK, 1993

Binienda2,b* 1College of Energy Engineering, Zhejiang University, Hangzhou 310027, China. 2Department of Civil Engineering, University of Akron, Akron, OH 44325, U.S.A.
Goldberg, Finite Element Model for Failure Study of Two Dimensional Triaxially Braided Composite, Journal of Aersopsace Engineering, 2011, 24(2):170-180. ].
Journal of Aerospace Engineering, 2015, 28(5): 04014117. ]: the macroscale, which represents the structural scale for analysis; the mesoscale, representing the braided pattern of architecture; and the microscale, containing the fiber and matrix micro-constituents.
Binienda, Mesomechanical Model for Numerical Study of Two-Dimensional Triaxially Braided Composite, Journal of Engineering Mechanics, 2010, 136(11): 1366-1379. ] developed a mesoscale analysis model for TDTBC and used it for studies and simulation of straight sided tensile tests.

Fusion Engineering and Design 138, 2019, pp. 339-346
-X., Srivatsan T.S., A mechanism for the formation of equiaxed grains in welds of aluminum–lithium alloy 2090, Materials Science and Engineering: A, Volume 351, Issues 1–2, 2003, pp. 304-309, ISSN 0921-5093 [4] Kostrivas, Tasos & Lippold, J.C.. (1999).
Materials Science and Engineering A 608, 2014, pp. 199-206
Materials Science and Engineering A 677, 2016, pp. 182-192
[12] Smithmetal: 2099 Technical Datasheet. 2018, Online: https://www.smithmetal.com/ pdf/lithium/2099-lithium.pdf [13] Lin, Y., Zheng, Z.Q., Li, S.C., Effect of solution treatment on microstructures and mechanical properties of 2099 Al–Li alloy, Archives of Civil and Mechanical Engineering, Volume 14, Issue 1, 2014, pp. 61-71, ISSN 1644-9665, [14] Bárta, J., Marônek, M., Sahul, M., Dománková, M., Lopatková, M., Urminský, J., Pašák, M., Microstructure analysis of heat treated AW2099 Al-Li alloy laser beam welded joints.

A Mesoscale Three-Dimensional Moisture Transport Model in Concrete Chengzong ZHOUa, Xianglin GUb *, Qinghua HUANGc and Xianyu JINd a, b, cDepartment of Structural Engineering, Tongji University, Shanghai 200092, China dDepartment of Civil Engineering, Zhejiang University, Hangzhou 310058, China azcz0919@163.com, b *gxl@tongji.edu.cn, chqh@tongji.edu.cn, dxianyu@zju.edu.cn Keywords: concrete, mesoscale, Voronoi diagram, moisture transport, three-dimensional model Abstract.
Engineering Mechanics. 11(2015) 9-17.
Journal of Engineering Mechanics. 139(7) (2013) 903-915
Engineering Mechanics. 26(8) (2009) 74-81.

Flexible Poly(imide) Siloxane Block Copolymers to Use at Biomedical Products Turkan Dogan1,a, Nesrin Koken2,b, Osman Bulut3,c and Nilgun Baydogan1,d* 1Energy Institute, Istanbul Technical University, 34469, Istanbul, Turkey 2Istanbul Technical University, Faculty of Arts and Science, 34469, Istanbul, Turkey 3Istanbul Technical University, Faculty of Civil Engineering, 34469, Maslak, İstanbul adgan.turkan@gmail.com, bnesrin@itu.edu.tr, cbuluto@itu.edu.tr, d*dogannil@itu.edu.tr Keywords: Copolymers, creep-recovery, poly(imide) siloxane, stress relaxation test.
Drug-loaded micelles without deformation are important for tissue engineering to carry drugs within the body or growth factors to protect the body from infection or tissue regeneration.
Dynamic Mechanic Analysis (DMA) of poly (imide) siloxane block copolymer was carried out by creep-recovery testing as a new generation polymer in polymer science and engineering.
Design engineering of biomaterials for medical devices, (Wiley, NewYork, 1998)
Hill, Design engineering of biomaterials for medical devices, Wiley, NewYork, 1998

(Amberg engineering, 2022) 80% of the rock was excavated using the continuous TBM method and the remaining 20% consisted of the cyclic method of tunnelling using blasting.
The engineers developed a total of three classifications of the excavated tailings during the processing of the rock material.
Underground civil engineering structures for transport infrastructure have a great potential.
At first sight, underground engineering works may appear to create a major intrusion into the natural state of the landscape.
Kuschel, Rock Material Recycling in Tunnel Engineering, Applied Sciences 2020, 10(8), p.2722. https://doi.org/10.3390/app10082722

V1 and Arya Aravind2, International Journal of Advances in Scientific Research and Engineering 03(5) (2017) 47-56
Mujalli, Effect of design properties of parent concrete on the morphological properties of recycled concrete aggregates, Engineering Science and Technology, an International Journal 22(1) (2019) 334-345
Ramli, EFFECT OF HYBRID FIBER ON THE MECHANICAL PROPERTIES OF RECYCLED AGGREGATE CONCRETE, Jurnal Teknologi (Sciences & Engineering) 80(5) (2018) 1-12
Rao, Strength and Permeability Characteristics of Fiber Reinforced High Performance Concrete with Recycled Aggregates, Asian Journal of Civil Engineering (Building and Housing) 13(1) (2012)
Vytlačilová, The fibre reinforced concrete with using recycled aggregates, International Journal of Systems Applications, Engineering & Development 5(3) (2011)