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Such materials are rare in nature.
The main multiferroic materials studied so far are TbMnO3, YMnO3, BiMnO3 and BiFeO3 [5,6, 9-11].
It is also suggested that oxygen vacancies and Fe ion with low valence in perovskite materials may contribute to the magnetism of the materials [26, 27].
Mutiferroic materials get strained under the influence of applied magnetic field.
Wang et al 2003 Science 299 1719 [7] M.

CEITEC IPM, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic 2Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, 616 69 Brno, Czech Republic anahlik@ipm.cz, bpokorny@ipm.cz, chutar@ipm.cz Keywords: railway axle, fatigue crack, generalized Willenborg model, crack retardation Abstract.
In the Fig. 4 the v-K curves of these materials are shown.
Probably the greatest difference of these materials can be found in threshold value of the stress intensity factor.
The figure shows very important difference of the residual fatigue lifetime of both materials when the original load spectrum is applied.
Schijve: Fatigue of structures and materials.

Third, biological material of scientific development and rational utilization of resources is the key to the sustainable development of the new type of rural community.
The fundamental one is to pay attention to biological material science development and rational utilization of resources.
Second, we should focus on the investment of agricultural science and technology education.
All kinds of investment of the current agricultural production in science and technology cannot match the requirements of the new type of rural community construction.
Theory Journal, 2007 (01)(In Chinese) [2] Qiang Gao.

Materials The TG-DTG-DSC of Huangmei pulverized limonite (-0.075mm) was carried out on the differential scanning calorimeter (STA 449 C model from Germany).
Nonferrous Metals Science and Engineering, 3(1)，pp. 2-7, 2012
Applied researches and new developments of magnetizing roasting on iron materials[J].
Journal of Iron And Steel Research International, 18(7), pp. 1-7, 2011
Journal of Aerosol Science, 34(8),pp.1085-1095,2003

ANSYS Simulation Technology of Pipeline Magnetic Flux Leakage Inspection Yang Lijian, Zhang Senlin and Gao Songwei School of Information Science and Engineering, Shenyang University of Technology, China.
The definition of material properties is shown in table 1.
Table.1 Material properties Material Attributes Steel sample penmanent magnets backing iron steel brush air X52 steel μ=1.05，H=860000A/m St37，μ=186000 μ=3.0 μ=1.0 Meshing.
Acknowledgement Project supported by the National Science Foundation of China (Grant No.60927004, 61141004) and Funded projects in the National Science & Technology Pillar Program(2011BAK06B01-03) during the Twelfth Five-year Plan period.
Electronic measurement and instrument4, 48.(2011) [5] Vijay Babbar,Lynann Clapham.Residual Magnetic Flux Leakage,A Possible Tool for Studying Pipeline Defects,J.Journal of Nondestructive Evaluation4, 22(2003)117-125.

Collision analysis models were first developed for analyzing the design of ships transporting nuclear materials.
In the field of material failure, the selection of material behavior until fracture is important, where this behavior influences the accuracy of non-linear finite element simulations.
Other problem such as modeling of the material damage criteria is explained in Refs. [12 and13].
V., 1959, "An Analysis of Ship Collisions with Reference to Protection of Nuclear Power Plants ", Journal of Ship Research
[7] Chen, D., 2000, “Simplified Collision Model (SIMCOL)”, Dept. of Ocean Engineering, Virginia Tech, Master of Science Thesis

Xu: Journal of Materials Processing Tech.
Tao: Key Engineering Materials.
Tse: Key Engineering Materials.
Materials.
Materials.

They are one of the widely used non-ferrous materials in recent decades and have been widely used in many fields[1,2].
Materials and Experimental Procedure The chemical compositions of the studied alloys are listed in Table 1.
The materials were prepared with pure zinc ingot, pure magnesium ingot, rare earth Nd and the Al-Si master alloy.
Vol.1 (1996), p.23-25 [4] Liushuan Yang, Gencang Yang and Yaohe Zhou: Materials Review.
B Vol. 64 (1951), p.747–753 [9] Xiaowei Wei and Baoluo Shen: Materials for Mechanical Engineering.

The processing of these waste materials not only requires a lot of manpower and material resources, financial resources, etc., but also has certain impacts on ecological environment.
According to this phenomenon, it becomes an indispensable important measure for developing green estate to make improvements and research on the green building materials.
The durability of concrete is the ability that concrete materials resist the damages caused by various factors such as itself and natural environment.
Prospects In conclusion, as a kind of new green building materials, recycled concrete can greatly improve the phenomenon of wasting of resources and ecological environment destruction caused by a lot of waste concrete.
Concrete. 2007 (2) References [1] Li Jun, Yin Jian: “Research on the Influence of Fly Ash and Slag on the Mechanical Properties of Recycled Aggregate Concrete”, “Concrete”, 2005 (6) [2] Wang Riguang, Ye Xianguo, Zuo Xiaoming: “Experimental Study of Shear Performance of Reinforced Concrete Bridge Piers”, “Engineering and Construction”, 2005 (2) [3] Wang Riguang: “Experimental Study of Shear Performance of Reinforced Concrete Bridge Piers Based on the Experiments and Finite Element Analysis”, “Hefei University of Technology”, 2005 (6) [4] Ai Qinghua: “Research on Shaking Table Test of Seismic Damage of Reinforced Concrete Bridge Piers”, “Journal of Dalian University of Technology” 2008 (5) [5] Sun Limin: “Experimental Study on Seismic Energy Dissipation Capability of Reinforced Concrete Piers”, “Hefei University of Technology (Natural Science Edition)” 2005 (9)

Materials and methods Cement used in this study is provided by the manufactures of Shandong province.
Dental Materials, 32(2016)223-232
[4] Jun Luo, Ingrid Ajaxon, etc., Compressive, diametral tensile and biaxial flexural strength of cutting-edge calcium phosphate cements, Journal of the Mechanical Behavior of Biomedical Materials. 60(2016)617-627
[5] Zhou Ke, Yang Yimin, The analysis of influence factors in cement strength test, Science and Technology Innovation Herald. 5(2014)1
[6] Yang Zhaofeng, Cement strength testing factors analysis and matters needing attention, Jiangxi Building Materials. 129(2013)345-346