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The reason is that for the sheet materials with the same thickness, a larger curvature radius leads to a smaller stiffness and force needed in bent deformation.
The reason is that when the curvature radius of fundamental ball body is enlarged, the touching area between the ball and sheet materials becomes larger and the touching pressure becomes smaller, which helps to relieve the indentation.
After the load is discharged, the materials in the field of plastic deformation remain some deformation, which causes the deformation of work piece.
Yang: Materials Science and Technology, Vol. 18 (2010) No.4, pp.459-463.
Li: Journal of Jilin University of Technology(Natural Science Edition), Vol. 34 (2004) No.1, pp.91-96.

(4) 3.2.1.2 Definition of Contact Surface Materials The main parameters needed to define soil materials are density parameters, elastic parameters and Mohr-Coulomb plasticity parameters.
If the calculated value on the left side of the equation is less than 1, the material is in a safe state, and the smaller the value is, the safer the material is
Constitutive model of soil and physical simulation of high gravity [J].Journal of mechanics, vol. 52(4) pp. 901-915, 2020
Composites Science and Engineering, pp. 68-75, 2020
China Science and Technology Information, pp. 35-36, 2019

Relevant Technical Requirements Analysis of Related Raw Material in Coarse Aggregate Concrete By summarizing the relevant literature, combined with practical experience summary of the author, in raw materials’ technical requirements in concrete, basically, not only should common concrete be in line with raw materials technical requirements, the effect of varieties of fine aggregate and coarse aggregate on cement dosage should also be fully considered.
Aggregate can be used as cheaper filler material comparing to cement slurry in project, and the new building material’s cost is cut down.
Science and Technology Innovation Herald. 2008 (21) : 77-78 [3] Shao Yanmei.
Journal of Building Materials in the 21st Century. 2009 (4) : 140-142 [6] Chen Sumei.
Journal of Flexural Strength of Concrete. (12) : 2002-47 48 + 59

Protein adsorption onto implant materials may therefore be of importance for the bond formation.
Serum proteins are also known to interact with HAp implant materials.
Materials and Methods Sample Preparation.
Key Engineering Materials Vols. 361-363 (2008) p. 127-130
Journal of material science, 33 (1998) p. 1927-1931

Effect of Micro-Zone pH Gradient on AM60B Vanadate Film and Corrosion Behavior Huabing Jinga, Zudong Heb and Suqiu Jiac School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China ajhb862317185@126.com, bhzd463271531@163.com, cjiasuqiu@126.com Keywords: AM60B; vanadate; conversion film; pH gradient; mechanism; corrosion Abstract.
Microchemical Journal, 2016,127
Corrosion Science,1995,37(11)
Applied Surface Science,2014,313
Advanced Materials Interfaces, 2016, 3(14).

Safety evaluation set of bored pile construction The system include safety management, geological conditions, mud, raw materials, borehole construction, steel cage installation, pipe installation, concrete pouring, etc., in the preparation of the safety checklist, we use a "safe (good), safer (better), general Safety (general), the more dangerous (poor), very dangerous (poor) "five levels of expression.
Evaluation set for construction are constr- uction preparation, safety management, geological conditions, mud, raw materials, borehole construction, steel cage installation, pipe installation, concrete pouring.
Hunan Communication Science and Technology, 2009,35(3):103-105) [4] HUANG Zheng-xiong.
Hunan Communica- tion Science and Technology, 2011, 37 (2):122-124) [5] DAI Bo.
Journal of Chongqing jiaotong University, 2012, 12 (20): 33-36 [8] ZHAO Song-xu,QIAN Cai,TIAN Yuan-fu.

FA Prasetya, M Nasrullah, AY Nugraheni, Study of Raman Spectroscopy on Graphene Phase from Heat Treatment of Coconut (Cocus nucifera) Shell, Materials Science Forum 827 (2015) 290-293
IOP Conference Series: Materials Science and Engineering 196 (2017) 1-4
AY Nugraheni, M Nasrullah, FA Prasetya, F Astuti, Study on Phase, Molecular Bonding, and Bandgap of Reduced Graphene Oxide Prepared by Heating Coconut Shell, Materials Science Forum 827 (2015) 285-289
Zhao, Biomass-derived carbon electrode materials for Supercapacitors.
,The Rise of Graphene, Nature Materials 6 (2007) 183-191

Study on Formulation and Certification of Technical Specification for Type III Environmental Declaration on Building Materials with Metal Composite Decorative Boards as an Example, China Building Materials Science & Technology. 6 (2013) 73-78
Enviromental Declaration of Metal Composite Decorative Board Product, China Building Materials Science and Technology (Metal Composite Materials Album). 2016
[6] L Ma, Q Jiang, C Zhao, Study on LCA-based Environmental Coordination Assessment Index System of Green Building Materials, China Building Materials Science and Technology. 2 (2010) 90-95
Study on Selection of Green Bulding Materials Based on Life Cycle Assessment, Materials China. 35 (2016) 769-775
Establishment Approach and Base Model of Chinese Life Cycle Reference Database, Journal of Environmental Science. 30 (2010) 2136-2144.

Over the years, as a basis for the supply of energy and important raw materials, the resource-based cities have made outstanding contributions to economic and social development of China.
It has become important in Shandong Province and the country's energy and raw materials production base.
Environmental Science News.
Science Press, Beijing, 2000.
Journal of Inner Mongolia Agricultural University (Social Science Edition).

Values for Model Simulations Length of pipe 100 m Coefficient of friction 0.04 Pipe material density 781 kg/m3 Internal radius 193 mm Elastic constant of pipe material 200 × 109 Pa External radius 203 mm Excitation force frequency 10 rad/s Excitation force 10 KN Fluid density 850 kg/m3 Foundation stiffness constant 1KN/m Table 3.
Zhang, Dynamic Analysis of an Axially Moving Underwater Pipe Conveying Pulsating Fluid, Frontiers in Marine Science, 9(982374), (2022) doi: 10.3389/fmars.2022.982374
Hu Critical flow velocity of fluid-conveying magneto-electro-elastic pipe resting on an elastic foundation, International Journal of Mechanical Sciences, 119, (2016), pp.273-282
Feng, Analysis of vibration stability of fluid conveying pipe on the two-parameter foundation with elastic support boundary conditions, Journal of Ocean Engineering and Science, (2022) https://doi.org/10.1016/j.joes.2022.11.002 Available online 16 December (2022)
Journal of Sound and Vibration, Elsevier, 329 (1), (2010), pp.72-83. ff10.1016/j.jsv.2009.08.029ff. ffhal-00838862