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As shown in Fig. 5, the figure shows the interface crack of bimaterial materials.
For the crack of bimaterial materials, the singularity of the crack tip is in the form of .
Elastic modulus and Poisson’s ratio of the the two materials at the top and bottom of plate are and , and , respectively.
Properties of the materials are: ,,.
Conclusions The virtual crack close technique can be applied in bimaterial materials.

Materials The commercial resole resin used in this study was Hexion Cellobond J2027L [6].
Microwaves heat materials internally and the depth of penetration of the energy varies in different materials.
As the raw materials of the composites are liquid and ceramic hollow spheres, the flexural test specimens were cast to shape.
[2] Smith, W F and Hashemir, J, Foundations of Material science and engineering, 4th edition, McGraw-Hill, (2006), pp. 523-525
[3] Strong, A B, Plastics: Materials and Processing, 3rd edition, Pearson/Prentice-Hall, (2006), pp. 182-183, 304-309, 323-333, 620-621

It is considered to be one of the most valuable synthetic polymer materials as its excellent mechanical properties, biocompatibility and antithrombogenicity[1].
However, the main problem of polyurethane as biomedical materials is the use of aromatic isocyanates, and degradation products aromatic amines have biological toxicity, causing cancer and inducing gene mutations [2,3].
Select the degradable biocompatible materials as raw materials, avoiding yellow color during storage and the carcinogenic aniline produced in the use, the waterborne polyurethane products prepared expressed good mechanical properties, biodegradation and other excellent properties, which can be widely applied in medical polymer materials.
Journal of Biomedical Engineering, 20(2003), 273-276
Journal of Clinical Rehabilitative Tissue Engineering Research, 12(2008), 2735-2738

School of Material Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China 2.
Applied Mechanics and Materials, vols.152-154 (2012) ,pp:28-33
Journal of Aeronautical Materials, vol.27, no.6(2007),pp:79-82
Chemical Propellant and Polymer Materials, no.06, (2004),pp:44-48
Synthetic Materials: Aging and Applications,1998,1:1-4.

Introduction Alkali activated materials, named geopolymers by Davidovits in 1978, are a class of alumino-silicate materials based on units such as sialate, sialate siloxo or sialate disiloxo [1].
Density is an important requirement for building materials.
For example it is known that low density materials have low thermal conductivity and materials designed for fire resistance applications could be exposed to high temperature for an extended period of time.
Sun, New building materials from fly ash-based lightweight inorganic polymer, Construction and Building Materials 21 (2007) 211-217
Rossignol, Silica fume as porogent agent in geo-materials at low temperature, Journal of the European Ceramic Society 30 (2010) 1641-1648

DE-SC0012704 with Brookhaven Science Associates, LLC.
Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No.
Svensson, Journal of Applied Physics 94, 7112 (2003) [7] S.
Thieberger, Materials Science Forum 1062, 361-365 (2022) [9] Z.
Dudley, Journal of Crystal Growth 627, 127535(2024)

IEEE Sensors Journal, 21(20):22833–22845, 2021
IOP Conference Series: Materials Science and Engineering, 797(1):012023, mar 2020
IOP Conference Series: Materials Science and Engineering, 981(2):022003, dec 2020
Journal of Physics: Conference Series, 1362(1):012110, nov 2019
Journal of Physics: Conference Series, 1964(6):062081, jul 2021

Preparation and Ferroelectric Properties of BaTiO3 Nanotubes ZHU Ning1,a, WANG Lijie1,b, DENG Xiangyun1,2,c* 1College of Physics and Materials Science,Tianjin Normal University,Tianjin 300387,China 2Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228,China a744290124@qq.com, b983855761@163.com,cxiangyundtj@126.com Keywords: BaTiO3 nanotubes; hydrothermal synthesis method; ferroelectric properties Abstract: BaTiO3 nanotube arrays are prepared by hydrothermal reaction using the TiO2 nantotubes prepared by anodic oxidation reaction.
Ferroelectric one-dimensional nano materials became a main direction for the future development since Japanese Iijima synthesized the carbon nanotubes successful in 1991 [1].
Acknowledgements This work is supported by National Natural Science Foundation of China (50872093 and 50872094), the Ministry of Science Technology, China through 973-Project under Grant No. 2002CB613301 and the 863-Project under Grant No. 2007AA03Z524.
Journal of Function Materials. 33(2002) 240-245
Journal of the American Ceramic Society. 86(2004) 2215-2217

China 2College of Chemistry & Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, P.R.
Material .
References [1] Pierpaolo Carlone, Gaetano Salvatore Palazzo, in: Finite Element Analysis of The Theroforming Manufacturing Process Using The Hyperelastic Mooney-Rivlin Model: volume 3980 of Computational Science and its applications (2006), p.794-803 [2] N.Billon, in: Constitutive model for HIPS in the Theroforming Range: volume 1 of Computational Science and its Applications (2008), p.1679-1682 [3] C.P.J.
Menary and P.J.Martin, in: Finite element analysis of the thermoforming of poplypropylene: volume 1 of International Journal of Material Forming (2008), p.779-782 [4] B.
Nied, in: Thermoforming of Knitted Composite Structures: FEM Simulation and Experiments: volume 3 of International Journal of Material Forming (2010), p. 615-618 [5] ISO6721-6, in: Methods of Testing Plastics-Part 3: Mechanical properties-Method 323C: Shear vibration-Non-resonance method: British Standard (1996) .

Experiment equipment, materials and method A high-power transverse flow CO2 laser device is applied in this research.
Science Publishing Company. 2009
The Influence of Operator Skills, Process Parameters and Materials on Clad Shape in Repair Using Laser Cladding by Wire.
Materials Processing Technology, 2006, 174（1-3）:223~232
Journal of Materials,2005,164-165:990~100.