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Analysis of the results of bending bearing of damaged old timber beams repaired and strengthened with CFRP Shuzhang Xiong 1,a, Xunzhong Zhang 2 and Bin Jia3 1Institute of Architecture and Civil Engineering, Xihua University Chengdu, 611930, Sichuan, China 2 Mianyang Vocational and Technical College, Mianyang, 621000, Sichuan, China, 3Southwest University of Science and Technology, Mianyang, 621010, Sichuan, China a 943089435@qq.com Keywords: CFRP, wooden beams, the bending bearing capacity, the deflection Abstract.
Based on two kinds of common material deformation, the stress increment rate is equal to the elastic modulus of the principle of work together cross section of a variety of materials can be used in the conversion elastic modulus ratio of the equivalent single material section.
References [1] Qian Zhou, Weiming Yan, Reinforcement technique of Iron in timber structure, Hydraulic and building engineering journal, 2011(9):1-5
FRP-reinforced wood as a structural material, Journal of Material in Civil Engineering, 1992,4(3), 300-317
[4] Gilfillan J R, Gilbert S Gand Patrick G R.The use of FRP composites in enhancing the structural behavior of timber beams, Journal of reinforced plastics and composites, 2003,22(15):1373-1389

These factors in turn are affected by the tool geometries, the cutting conditions, and the properties of the work materials.
Response Surface Methodology (RSM) has been utilized for determining the residual-stress under different cutting conditions and for different materials[5].
Fattouh: International Journal of Machine Tools and Manufacture.
Sun: Chinese Journal of Mechanical Engineering Vol. 14(2) (2004), p.40 [7] K.
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Materials Acetonitrile and ethyl acetate were HPLC grade and purchased from J.T.Baker (USA).
Acknowledgment This work was financially supported by the Special Fund for Quality-Science Research project "doubles strike" key geographical indication protection technology on the origin of Chinese medicinal materials inspection appraisal method（2012104019-4） References [1] Chen Yunyun, Ding Yi, Wang Wei,et,al.
Tsinghua science and technology Vol.12(2007),P389-393 [2] Tan Ninghua, Zhao Shouxun, Chen Changxiang, Zhou Jim.Chemical constituents from tubers of Pseudotellaria heterophylla.Acta Botanica Yunnanica, Vol.13 (1991),P440-431
Research status and trends of pseudOstellariae radix, Chinese Journal of New DrugS Vol.21(2012)，P757-760 [4] Chun-Zhao Liu,Hua-Ying Zhou,Qiong Yan. “.Fingerprint analysis of Dioscorea nipponica by high-performance liquid chromatography with evaporative light scattering detection”, Analytica Chimica Acta, Vol. 58(2007),P61-66
“Fingerprint analysis of fruiting bodies of cultured Cordyceps militaris by high-performance liquid chromatography photodiode array detection”, Journal of Pharmaceutical and Biomedical Analysis, Vol. 44(2007), P818-822.

Orthogonal cutting experiments The material used in this study is a forging bar of Fe-36Ni invar alloy and the chemical composition is listed in Table 1.
The material were then annealed at 1000°C for 2.5h within hydrogen and nitrogen, and the hardness after heat treatment is 140HBS.
Acknowledgement This work is supported by China National Science Foundation (No.51075298) and Tianjin University & Education Foundation ( KYQD10002).
ASME, Journal of Applied Mechanics Vol. 31(1964), p.189 [2] J.
International Journal of Mechanical Sciences Vol. 39(1997), p.1273 [4] J.

Based on fractal geometry and micro contact size distribution function, a fractal model of contact stiffness of joint interfaces was proposed in reference [6]: (1) (2) The dimensionless normal contact stiffness of joint interfaces can be as: (3) in which ,is the nominal contact area, ,is the real contact area, is the dimensionless contact area, ,is the dimensionless critical contact area, is the equivalent elastic modulus of the two materials of the two surfaces
when and (14) when (15) , in which and ,is the Poisson’s ratio of the softer material.
Acknowledgment The research was supported by the National Science Foundation under Grant No.50775153 and Shanxi Scholarship Council of China under Grant No.2011-076.
Journal of Tribology, Transactions of ASME(2010), 132：011401-1－011401-7
[8] Wang S, Komvopoulos K．Journal of Tribology, Transcations of ASME(1994),116(4)：812～823

It is well known when grain size of the materials decrease to nanoscale or sub-micron, material properties tend to become isotropic, which improves the material surface hardness and strength effectively.
Thus, the scholars have widely studied the method of material surface nanometer and properties of nanocrystallization materials.
Barbucci[10]、Vinogradov[11]and Balyanov[12] found that with the degree increase of the surface crystallization, grain size of materials gradually decreased, grain boundary volume increased, and corrosion rate was accelerated.
Vol.200(2006), p: 4777-4782 [5] Yunwei Hao, Bo Deng, Cheng Zhang:Journal of iron and steel Research.
Vol.3(2004), p: 225-229 [13] Shunsuke UCHIDA, Masanori MAITOH, Yasushi UEHARA:Journal of Nuclear Science and Technology.

Addressing these questions will contribute valuable insights into composite materials science, particularly in optimizing adhesive joint design for structural GFRC applications.
Materials The materials employed were: a.
Preparation of tools and materials required for bonding.
Adhesively bonded joints in composite materials: An overview.
Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 223(1), 1–18. https://doi.org/10.1243/14644207JMDA219 [8] Papadopoulos, I.

The material selected to act as micro-cantilever beam is aluminum (Al).
The dimension of the selected materials for the 2D device is shown in table 1 while the material properties selected for the design is shown in table 2.
MATERIALS AND DIMENSIONS Parameters Micro-channel Micro-beam (Al) Length 300 µm 5 µm Height 100 µm 47.5 µm The fluid enters the device through the inlet, faces the micro-cantilever and then exits towards the outlet.
Geitmann, PDMS Microcantilever-Based Flow Sensor Integration for Lab-on-a-Chip, IEEE Sensors Journal, 13 (2013) 601-609
Andreopoulos, Energy Harvesting from Highly Unsteady Fluid Flows using Piezoelectric Materials, Journal of Intelligent Material Systems and Structures, 21 (2010) 1263-1278

The elements of Fe, Ni, Cr, Mo and Mn are the main components of the candidate cladding materials of 316-stainless steel.
Raw powder materials were proportionally mixed homogeneously for 1 hour.
References [1] C.D.Bowman: Nuclear Science and Engineering Vol. 161(2009), p. 125
[14] R.J.M.Konings: Journal of Nuclear Materials Vol. 320(2003), p. 1
[15] Yoshiro Shirasu, Kazuo Minato: Journal of Nuclear Materials Vol. 320(2003), p. 25

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