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Based on the studies about damage assessment on the level of materials and components，the author made a comparative analysis on the damage mechanism and applicable conditions，and put forward the amended formulas for calculating the flexural and shears capacity，This paper combined with results of previous studies, based on the structural damage assessment research, reinforced concrete beam structure correction formula is given in the event of cracks and shear cracks.The assessment formula for shear capacity was established as well，and in which various impact factors of shear strength was considered comprehensively.
Acknowledgements This work was financially supported by Science and Technology Department’s Directive project (10215622D), Hebei province of China, and gratefully acknowledged.
References [1].ZHANG zhen-shuan，WANG zhan-lei,，Safety of existing reinforced concrete beams，[D]，Journal of Dalian University of Technology ,2007 [2].Qianyong-jiu,Chehui-min, Assessing method of the strength of oblique cross-section study about existing reinforced concrete bridge.
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LIU Meng, LI Shen-tian, Experimental Study 0f RC Beams with Inclined Cracks.Dalian University of Technology, Journal of LliaoNing Institute of Technology ,2004,4

However, the hard machinability of titanium alloy material is crucial for its further applications.
The main reasons are as follows: (1) The poor thermal conductivity of the material leads to the sharply rising temperature in the cutting zone, and the temperature on the tool face can even reach 1000°C or more. (2) Titanium alloys can maintain its high strength at high temperature which may lead to a stubborn cutting resistance at higher cutting speeds. (3) The small tool-chip contact area usually will cause a highly concentrated stress and heat generation on the tool nose. (4) Titanium is easy to react with tool materials under a high cutting temperature[2].
Acknowledgements This research is supported by the National Natural Science Foundation of China (Nos. 51375011, 51275302), the Natural Science Foundation of Jiangsu Province (No.
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Al-amir, Free Convective Thermal Transmission through Distinct Geometrical Shapes, J. of Metallurgical and Materials Engineering, 30 (2024) 357-369
Abd-Saada , Heat Transfer by Free Convection between Horizontal concentric Pipes,The Iraqi Journal For Mechanical And Material Engineering. 8 (2008)
Mohammed, Numerical Analysis of Heat Transfer in Annulus of Composite Material at Different Operation Conditions, Wasit Journal of Engineering Sciences. 12(2024)
Alresheedi, Conjugate entropy generation and heat transfer in a wavy walls’ enclosure containing a suspension of dilute nano-encapsulated phase change material , Journal of Taibah University for Science.(2025)
Majdi, Comprehensive Review of Natural Convection Heat Transfer in Annulus Complex Enclosures, Al-Qadisiyah Journal for Engineering Sciences. 13(2020).

Journal of the Mechanical Behavior of Biomedical Materials, 19(18), (2008). pp. 1621 – 1639 [6] M.
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Wang, “Nanostructures of zinc oxide,” Materials Today, vol. 7, p. 26-33, 2004
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Wang, et al., “Growth of ZnO nanorod forests and characterization of ZnO-coated nylon fibers,” Materials Letters, vol. 64, pp. 327-330, 2010
Green, et al., “Nanowire dye-sensitized solar cells,” Nature Materials, vol. 4, pp. 455-459, 2005
Farzaneh, “Synthesis of ZnO nanocrystals with hexagonal (Wurtzite) structure in water using microwave irradiation,” Journal of Sciences, vol. 17, pp. 231-234, 2006

Amaranth crops of different varieties were used as raw materials.
The moisture content of raw materials was determined by the standard weight method.
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MMC-components in (near-) net shape quality and, thus, to make these interesting materials attractive to mass production.
The density of the materials was increased by subsequent thixoforging compared to the sintered billets (Table 2).
Custom-made Materials for Automotive and Aerospace Engineering, Wiley-VCH Verlag GmbH & Co.
Raybould, The properties of stainless steel compacted dynamically to produce cold interparticle welding, in: Journal of Material Science 16 (1981) 589-598
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Materials and Methods Materials.
Chemical compositions of materials Table 2.
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Inevitable trend of low-carbon China's past economic model was more extensive.The development of economy took up a lot of raw materials and energy and the added value of products were not very high.This kind of development model has caused lots of pressure on resourses, energy,and environment,which is unsustainable.In this context,the low-carbon economy came into being.
Situation of China's Logistics Industry Small-scale logistics enterprises, low efficiency.Most of China's logistics enterprises are evolved from the traditional materials ,commercial storage and transportation companies.The scale of them are small.
Fig.1:Carbon emissions of various transport modes Warehousing is one of the central part of logistics,which plays an important role in buffer,adjustment and balance.Low-carbon warehousing requires the location of warehouses to be reasonable and the layout to be scientific so that to save transportation cost and improve the utilization rate of storage facilities.Warehouses adopt green building art and take full advantage of eco -friendly materials and green power in ventilation,lighting and other aspects[4].
Packaging should be on the basis of product’s life cycle.On the principle of reduce,reuse and recycle, reduce the use of disposable plastic packaging materials and promote the use of biodegradable and other environmental friendly packaging materials.The design of packages should be sizeable so that to save materials and costs.Moreover, promote the standardization of packaging so as to reuse the package.
References [1] Li Li, submitted to Journal of Computational sciences and optimization(2011) [2] Liang Han and Xinxin Li, submitted to Journal of Advanced materials research (2011) [3] lu Fan, submitted to Journal of China business and market(2011),In Chinese [4] Cailing He and Cuihua Zhang, submitted to Journal of Value engineering (2010) ,In Chinese [5] Ruiyu Pan, submitted to Journal of E-Business and E-Government(2011) [6] Shan Cai,Sumei Xiao,Yuqiang Shi and Zhaolong Xu, submitted to Journal of E-Product E-Service and E-Entertainment (2010)

Microstructure and Mechanical Properties of Aluminum/Stainless Steel Joints Welded by Different Weld Heat Input Hongtao Zhanga, Jiakun Liub and Hongyun Zhao,c School of Materials Science and Engineering, Harbin institute of Technology at Weihai Weihai, Shandong, 264209, China ahitzht@yahoo.com.cn, bljk_hit@163.com, chy_zhao66@163.com Keywords: Aluminum; Zinc-Coated Steel; Intermetallic Compound; Heat Input Abstract.
Materials and experiments The base metals used in this experiment were aluminum alloy 2B50 and stainless steel 06Cr19Ni10.
References [1] Schubert E: Journal of Materials Processing Technology, Vol. 15, Issues 1 ( 2001), Pages 2-8
Demir: Materials Letters, Vol. 62, Issue 25 (2008), Pages 4158-4160
[4] Takehiko Watanabe: Journal of Materials Processing Technology, Vol. 178, Issues 1-3 (2006), Pages 342-349