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Damage detection analysis of simple beams based on strain mode Xiang Guo1, a, Jiaquan Wu1,b,Kun Ma1,c 1Faculty of Science,Kunming University of Science and Technology, Kunming, Yunnan, China, 650093,China aguoxiangwin@yahoo.com.cn,bwjqlhy@sina.com,cmakun_box@sina.com Corresponding author: Kun Ma, School of Science, Kunming University of Science and Technology,makun_box@sina.com Keywords: Simple supported beam, Displacement mode, Strain mode.
As the initial conditions of simple beam, so from equation (3) available: (4) So displacement mode shapes is: (5) As the relationship between strain and deflection of the mechanics of materials: (6) Where y is the distances between the measured position and neutrosphere, u is deflection of the mechanics of materials.
Principle of structural damage Damage is due to the role of the external load and the environment led to micro-structural defects (such as micro-cracks, micro voids, etc.) caused by the degradation process of materials or structures.
Journal of Jinan University (Natural Science) 2008,29(5)
Journal of Baotou University of Iron and Steel Technology,2005,24(1)95-98

Hristoforou, Non-destructive evaluation of magnetic metallic materials using Hall sensors, Journal of Materials Processing technology, 161, p. 359-362, 2005 [6] K.
Ktena, Magnetostriction and magnetostrictive materials for sensing applications, J.
Hristoforou, Investigation of magnetic, mechanical and microfailure behavior of ARMCO - type low carbon steel corroded in 3.5% NaCl - aqueous solution, Materials Science and Engineering A, MSEA-D-13-00774, accepted 2013 [15] B.
Yoo, Effects of finish rolling temperature on inverse fracture occurring during drop weight tear test of API X80 pipeline steels, Materials Science and Engineering A, 541, p.181-189, 2012 [19] S.
Kim, Effects of specimen thickness and notch shape on fracture modes in the drop weight tear test of API X70 and X80 linepipe steels, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 42, p. 2619-2632, 2011 [20] ASTM Standard E23: Standard Test Method for Notched Bar Impact Testing of Metallic Materials ASTM, West Conshohocken, PA, 2007 [21] P.

The elastic material was adopted as the rock material for the calculation.
Fig.1 The cross section of the slope Fig.2 The finite element mode of the slope Effects of Excavation Angle on Slopes Damage under the Static Condition Material damage is the gradually physical process to damage material.
[3] R.Q.Huang, W.L.Li: Chinese Journal of Rock Mechanics and Engineering.
[10] Y.L.HE, S.Y.LU:Chinese Journal of Geotechnical Engineering.
[12] L.J.TAO, S.R.SU, Z.Y.ZHANG:Journal of Engineering Geology.

The performance indexes of the fiber cloth and cementation of materials provided by the manufacturer.
Material performance of BFRP Table 1 Surface density [g/m2] Single fiber diameter [μm] Tensile strength [Mpa] Modulus of elasticity [Gpa] Elongation [%] Thickness [mm] 200 7 2100 91 2.6 0.111 Material performance of Cementitious materials Table 2 Material types Tensile strength [Mpa] Modulus of elasticity [Gpa] Elongation [%] YZJ-CQ dipping glue 53.9 2.885 3.0 Strengthening program and loading system.
Acknowledgements This article is supported by the key project of natural science fund of tianjin (12JCZDJC28900) and project of science and technology start sea project of tianjin (KJXH2012-19).
Vol. 37(2007), p. 11 [2] Ergai Xie, Zhongying Li: Journal of fiber cloth.
Vol. 37(2007), p. 1 [4] Xujun Chen, Yongxin Yang, Jianying Xing, Ling Hu, Jian Gen: Journal of Zhengzhou University（Engineering Science）.

International Journal of Plasticity 20 (2004) 55-84
Journal of Northeastern University: Natural Science, 23 (2002) 976-979.
Journal of Northeastern University(Natural Science), 32 (2011) 964-967.
International Journal of Mechanical Science, 25 (1983) 71-74
Beijing: Science Press, 2006, pp. 25-26

Finite element analysis and Experimental Verification on Mechanical Properties of Steel Mash Reinforced HDPE Composite materials Xin Qian, Yangfu Jin, Mi Zhou, Jianan Sun College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, China Qianx@zjut.edu.cn KeyWords: Steel mash reinforced HDPE，Mechanical properties，Finite element analysis, experimental verification Abstract.
This paper will provide the basis for product design of steel-plastic composite materials through the tensile and flexural simulation analysis and experimental verification of the steel-plastic composite materials.
Simulation and Experiment Steel mash reinforced HDPE composite materials specimens.
It can be found that the change in the wires number in length almost not affect the tensile modulus of composite materials.
：International Journal of Solids and Structures, 2001, 38: 9053-9075

Diefenbach: Material Science and Engineering R Vol. 15 (1995), p. 263-347
Togano: Journal of Materials Science Vol. 30 (1995), p. 3429-3434
Cantor: Material Science and Engineering A Vol.
Granasy: Materials Science and Engineering A Vol. 413-414 (2005), p. 418-422
Tewari: Journal of Materials Science Vol. 28 (1993), p. 5414-5425.

These material conditions reflect a cultural atmosphere condensing extremely rich spiritual wealth.
(3) Material culture.
Journal of Qinghai normal college ,2007（4） [5] Ni Gang, Chen Hui, Lin Weuying.
Journal of Guangdong university of Technology , 2009(9) ［6］Li Yuhong.
Journal of South central university for nationalities, 2007 (2001)

The authors designed the tests to make a comprehensive study considering all the factors published in the Science Direct Database during January 2004 to September 2014.
The biomass conversion efficiency relies on the usage, material, size and shape of the particles, gas flow, and types of reactors.
Progress in Energy and Combustion Science 2005, 31(2):171-192
Progress in Energy and Combustion Science 2011, 37(4):462-502
[22] Parikh J, Lior N: Energy and its sustainable development for India, Editorial Introduction and commentary to the Special Issue of Energy – The International Journal.

Series: Materials Science and Engineering 509, 012096 (2019) 1-6
Al-Nahrain Journal for Engineering Sciences.11 (3) (2008) 366-73
Abeer A., Effect of Using Lightweight Aggregate on Properties of Roller-Compacted Concrete, ACI Materials Journal. 114 (4) (2017) 517-525
Zong, Evaluation of Relationship Between Water Absorption and Durability of Concrete Materials, Advances in Materials Science and Engineering (2014) 2-8
Yohanes, Experimental study of crack depth measurement of concrete with ultrasonic pulse velocity (UPV), IOP Conference Series: Materials Science and Engineering.