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., College of Engineering, University of Al-Qadisiyah, Al-Diwaniyah, Iraq 2Department of Computer Techniques Engineering, College of Technical Engineering, University of Alkafeel, Najaf, Iraq *Corresponding author, e-mail: ahmed.raee@qu.edu.iq, nabel.abdali@qu.edu.iq, muhsen.mohammad@alkafeel.edu.iq Keywords: frequency response, multi-layers composite, modal analysis, finite element, carbon/epoxy.
[7] Abd-Ali, N.K., Madeh, A.R., Experimental and Numerical Investigation of Factors That Affecting in Frictional Welding of Mild Steel and Al alloy A356, ICOASE 2018 - International Conference on Advanced Science and Engineering, 2018, pp. 456–461, 8548940
‏ [9] Roundi., El Mahi, A.
,El Gharad, A., & Rebière, J.

Theoretical investigations and simulation of the hydroforming processes performed on c1010 low carbon steel tubes Mohamed Mohamed1, 2, a *, Ali Abd El-Aty2, b, Abdel Aziz Hegazy2, c, Nader Farahat2, d 1 Department of Mechanical Engineering, Imperial College London, SW7 2AZ, London, UK. 2Department of Mechanical Engineering, Helwan University, Cairo, Egypt.
FE Model and Validation Analysis FE Model The FE model is built up based on the case study, which is published by Ahmetoglu et al., 1997)[4].
It can be seen from the fig. that the displacement at the upper free end of the tube is about 12.7 mm. this value is the same initial axial feed used by Ahmetoglu et al., 1997 [4].
The initial axial feed and all other tube and process parameters are the same as in the investigations of Ahmetoglu et al., 1997 [4].
There heavy fluctuations in the curves of Ahmetoglu et al., 1997 [4] at the lower end of the and in the bulging region, where wrinkles may occur.

In this study, the microcrystalline cellulose was prepared by following the method of El-Sakhawy and Hassan [1].
The CrI (%) was calculated according to the equation of Segal et al. [3].
References [1] El-Sakhawy, M. and Hassan, M.L. 2007.

The elongation (El) also increases.
Mechanical properties of EPR alloy before EPT, after EPT and after annealing № treatment/ EPT regime YS, [MPa] UTS, [MPa] El, [%] 1 EPR 1320 1500 5 2 EPR+ EPT, 100 A/mm2, 3 s 1350 1550 10,6 3 EPR+ EPT, 100 A/mm2, 10 s 550 640 18,3 4 EPR + annealing at 450°С,1h 1150 1350 14 Conclusions 1.
Trubitsyna et al., J.

Colla et. al. [4] showed that the transition from untilted to tilted crystal structures in the Ba1xSrx(Zn1/3Nb2/3)O3 system is accompanied by a change of the signal of the TCε value, from negative to positive.
[4] E.L.
Reaney, E.L.

Kalem et al. [8].
[5] R.El-Mallawany : J.
EL-Mallawany : Tellurite Glasses Handbook (CRC Press, Boca Raton 2002), chap.9

Nagia et al. evaluated the anthraquinone dyes isolated from the fungus Fusarium oxysporum in dyeing wool.
El-Shishtawy, B.
EL-Mohamedy, Dyes and Pigments. 75 (2007) 550

The concentration of Al (damage to human intelligence) is low.Pumpkin seeds were roasted, the concentration of Se, Cu, Al were less than LOD, the concentration of P is decreased seriously.
[2] El-Adawy T A, Taha K M.
[3] Stevenson D G, Eller F J, Wang L, et al.
[4] Lott J N, Ockenden I, Raboy V, et al.
[10] Seeram N P, Schutzki R, Chandra A, et al.

The test results showed that addition of titanium by electrolysis is an effective way to refine the grain size of Zn-Al alloy.
Experimental materials and procedure The chemical composition of tested ZA48 alloy is shown in Table 1, which was prepared in a graphite crucible by melting pure Al, Zn, Mg and Al-50%Cu alloy.
Al3Ti particle has a body-centred cubic structure, its lattice constant a=b=0.3844nm，c=0.8596nm，which is very close to that of Al(a=0.4049nm).
Therefore, the TiAl3 particles could serve as the nuclei and refined α (Al) phase effectively.
Abou El-khair, A.

El-Raghy, Layered machinable ceramics for high temperature applications, Scripta Materialia. 36(5) (1997) 535-541
El-Raghy, The MAX phases: Unique new carbide and nitride materials: Ternary ceramics are soft and machinable, yet heat-tolerant, strong and lighweight, American Scientist. 89(4) (2001) 334-343
Wang et al., Oxidation behaviour of Ti–Al–C films composed mainly of a Ti2AlC phase, Corrosion Science. 53(9) (2011) 2948-2955
Huneau et al., Experimental Investigation in the Quaternary Systems Ti-Ni-Al-N and Ti-Ni-Al-O, Journal of Solid State Chemistry. 155(1) (2000) 71-77
Wang et al., Interdiffusion Behavior of Ni–Cr–Al–Y Coatings Deposited by Arc-Ion Plating, Oxidation of Metals. 56(1-2) (2001) 1-13