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Here the beam is made of three different composite materials with same geometry.
The properties of the materials are listed in Table 1.
Fig 2 to Fig 5 shows the first two mode shapes of the beam with all three different materials.
Chawla "Composite Materials Science and Engineering", springer. pp. 7-101 [2] Singiresu S.
International journal of engineering research and general science.

The solid 46, 3-D layered structural solid element, is used to represent the GFRP materials.
Layer thickness, layer material direction angles, and orthotropic material properties need to be defined in this element.
Construction and Building Materials Journal, V.40 (2013), p. 575–583
Key Engineering Materials.
International Journal of Mechanics and Materials in Design.

Materials & Experimental Materials Poly(lactic acid) was purchased from NatureworkTM.
Biomedical Science, Engineering and Technology, 247–282
Journal of Polymers, 52, 1892–1899
Journal of Biomaterials Science, Polymer Edition, 1145–1158
Journal of Polymer materials: An International journal. 33(1), 191-200.

Introduction The size effect is known in the science of fatigue material failure and design elements.
Tomaszewski, Application of mini specimens to high-cycle fatigue tests, Journal of Polish Cimac (2011) 279-287
Tanigawa, Effect of specimen size on fatigue properties of reduced activation ferritic/martensitic steels, Journal of Nuclear Materials (2000) 283-287
Furuya, Notable size effects on very high cycle fatigue properties of high-strength steel, Materials Science and Engineering A (2011) 5234-5240
Tartaglia, Microstructure and fatigue properties of hydroformed aluminum alloys 6063 and 5754, Metallurgical and Materials Transactions A (2003) 2549-2557

It should be noted that friction stir processes can be also used to join the metallic materials [4] and thermoplastics composites [5-7].
Mroczka, Friction stir welding of elements made of cast aluminium alloy, Archives of Metallurgy and Materials 59 (2014) 385-392
Jachym, Characteristics of Laser Welded Joints of HDT580X Steel, Materials Science Forum 638-642 (2010) 3739-3744
Dymek, A Coupled Thermal/Material Flow Model of Friction Stir Welding Applied to Sc-Modified Aluminum Alloys, Metallurgical and Materials Transactions A, 44 (2013) 1730-1740
Sedek, Using a Coupled Thermal/Material Flow Model to Predict Residual Stress in Friction Stir Processed AlMg9Si, Journal of Materials Engineering and Performance 24 (2015) 1305-1312

The Table 1 shows the applied materials.
The tensile, compression and the SEM tests were performed with the help of the Department of Polymer Engineering and the Department of Materials Science & Engineering of the Budapest University of Technology and Economics.
Journal of applied physics, 34/6. (1963) 1793-1801
[7] Qing-Hua Zhang, Da-Jun Chen, Percolation threshold and morphology of composites of conducting carbon black/polypropylene/EVA, Journal Of Materials Science 39 (2004) 1751-1757
MATERIALS SCIENCE FORUM 589 (2008) 179-184

Delaunois, Thermal cycle simulation of welding process in low carbon steel :Materials Science and Engineerin,530, (2011)191-195
H.Qiu, R.Ito, K.Hiraoka, Role of grain size on the strength and ductile–brittle transition temperature in the dual-sized ferrite region of the heat-affected zone of ultra-fine grained steel, Materials Science and Engineering, sectionA, (2006) 648-652
Jonas, Testing of Welded Pipeline Steel, Materials Science and Engineering A420, (2006.)115-121
Sathiya, M.K.Mishra, and B.Shanmugarajan, Effect of shielding gases on microstructure and mechanical properties of super austenitic stainless steel by hybrid welding, Journal of Materials and Design,33, (2012)203-212
S.Bordbar, M.Alizadeh and S.H.Hashemi , Effects of microstructure alteration on corrosion behavior of welded joint in API X70 pipeline steel, Journal of Materials and Design,45,(2013) 597-604

Introduction III-V group semiconductor materials (InSb, InAs and their solid solutions) are among the most widely used materials of magnetic field sensors.
Concentration dependence of the change rate for charge carrier concentration of all the studied materials has linear character.
Its intersection with zero axis makes it possible to determine the optimum initial charge carrier concentration for each of the materials under research.
The values of the optimum charge carrier concentration for each studied material, which would ensure a minimum parameter change in these materials under neutron irradiation, have been determined.
Kolin: Neutron-Transmutation Doping and Radiation Modification of Semiconductors: Current Status and Outlook, Russian Physics Journal, 46 (6), 543-551 (2003)

The limitations of the process are that it can be applied only for electrically conducting materials and machining takes place slowly.
EMM is one of the unconventional techniques applied in the micro-fabrication domain to produce micro holes on modern materials [9].
Sridhar (2001) Electrochemical micro-machining: new possibilities for micro-manufacturing, Journal of Materials Processing Technology, 113, 301-305
Munda (2003) Experimental investigation into electrochemical micromachining (EMM) process, Journal of Materials Processing Technology, 140, 287–291
Kozak, 2004, Thermal models of pulse electro-chemical machining, Bulletin of the Polish Academy of Sciences Technical Sciences, Vol 52, No. 4, 2004, pp. 313-320

Acknowledgements Fund item: Aided financially by natural science fund of Tianjin Science and Technique Committee (08JCYBJC14000) Item name: Research on composite powder and molding technology of injection molding bonded NdFeB magnets.
Electrical Material,2003(1):31-34
Journal of Magnetism and Magnetic Materials,2002,239:421~423
Journal of Magnetic Materials and Devices, 2003,34(4):36~39
Journal of Magnetism and Magnetic Materials,2003,257:32~43