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Introduction Concrete is a kind of manufactured materials which is the most widely used [1].
At present, nano materials that researchers usually used to modify cementitious materials were nano-SiO2, nano-clay, nano-Al2O3, nano-Fe2O3 and nano-CaCO3.
When the content of NA was 2%, the machanical properties of modified cementitious materials were improved most.
So to different nanoparticle, it had the optimal content to modify the properties of cementitious materials.
Shirin: Journal of American Science.

While new materials receive extensive attention including amorphous materials, nanocrystalline materials etc.
Janghorban: Journal of Materials Processing Technology, 189 (2007), p. 2
Yamashiro: Materials Science and Engineering, A293 (2000), p.261
Haneczok: Journal of Materials Processing Technology, 157–158 (2004), p. 735
[7] Maria Teresa Clavaguera-Mora, Narcis Clavaguera, Daniel Crespo, Trinitat Pradell：Progress in Materials Science，47 (2002)，p. 561

The paper presents results obtained during low velocity impact tests, performed on sandwich materials of different types.
Description of the experimental work The materials used for the impact tests were sandwich materials having honeycomb or foam cores, and were described in the twin paper [3], where the bending behaviour was described.
The next series of low velocity impact tests were made on samples having similar core materials, but thick skins [3].
Discussion and conclusions The analysis of the quite diverse results obtained during the experiments involving four types of sandwich materials outlines the complexity of the low velocity impact phenomenon on sandwich materials and the need of careful assessment.
Constantin, Multi- and interdisciplinary aspects in structural health monitoring, Academic Journal of Science, 2(1) (2013), 237-242

Features of Femtosecond Micromachining of Solid Transparent Materials Anton S.
Femtosecond laser processing can be successfully implemented for any materials irrespective of their optical properties, that, in turn allows using the developed computerized laser complex for modification of bulk glass materials.
Qiu, Femtosecond laser induced phenomena in transparent solid materials: Fundamentals and applications, Progress in Materials Science. 76 (2016) 154-228
, Journal of Applied Physics. 118 (2015) 233108
Callan, Three-dimensional optical storage inside transparent materials, Optical Letter. 21 (1996) 2023-2025

Materials.
IOP Conference Series: Materials Science and Engineering. 390. 012075
Materials today: proceedings. (2019)
Journal of Engineering and Applied Sciences, 2013; 12. 102-110
Journal of Composite Materials, 2019; 53(28-30), 4215-4223.

Tong: journal of Beijing textile，(2005) [3] Xiyuan.
Xu: Journal of Western Leather (2005) [5] Songwen .
Ma: Journal of Henan Mechanical College (2009) [9] Liping.
Li: Journal of Zhejiang Sports Science, (2004) [10] Jianxin.
Yang: Journal of Chinese Leather，(2006)

It is reported that the mechanical properties of three-phase ceramic materials with appropriate ingredient design can be much better than two-phase ceramic materials [2].
Key Engineering Materials 359-360 (2008) 329-334
Olevsky, Journal of the American Ceramic Society 86 (1) (2003) 49–53
Materials Chemistry and Physics, 109 (2008) 325-333 [12] S.
Zou, et al., Computational Materials Science. 50, 3334-3341.

Yao, A fatigue damage model of composite materials, Int.
Miller, Predicting Fatigue Damage of Composites Using Strength Degradation and Cumulative Damage Model, Journal of Composites Science, 2(1), (2018) 9
Yazdani, Prediction of Remaining Fatigue Cycles in Composite Materials Under Uncertainty, ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems Part B: Mechanical Engineering, 2, (2016)1-6
Whitney, Fatigue characterization of composite materials.
In: Fatigue in fibrous composite materials, STP 723.

China 2Henan Institute of Science and Technology, Xinxiang 453003, P.
Acknowledgements Supported by the National Natural Science Foundation of China (No.51075125), the Natural Science Foundation of Liaoning Province (No.20081082), the Key Project of Science and Technology R & D Program of Henan Province (No.102102210405), the Research Project program of Natural science of the Education Department of Henan Province (No.2009A460004) and Funded by Science and Technology Innovation Program of Henan Institute of Science and Technology.
:Chinese Journal of Mechanical Engineering, Vol. 39, No.10 ( 2003), p.100-105 [2] J.X.
Forum, Vol. 471-472(2004), p. 26-31 [3] Su Jianxiu, Guo Dongming,Kang Renke, et al.: Chinese Journal of Semiconductors, Vol. 26, No.3 (2005), p.606-612 [4] Su Jianxiu: Study on material removal mechanism of wafer chemical mechanical polishing in IC manufacturing.
Vol. 252, No.3-4(2002), p. 220-226 [6] F.G.Shi, B.Zhao: Applied Physics A (Materials Science & Processing), Vol.67, No.2 (1998), p.249-252

Materials and Methods Materials used in these studies were AA 6061 and AA 6063.
Virginia Tech Materials Science and Engineering. http://www.eng.vt.edu . (25.04.1997) [2] Ballard, J.1997.
Virginia Tech Materials Science and Engineering. http://www.eng.vt.edu . (25.04.1997) [3] Chao, Y.
Materials Science and Engineering A (445-446): 180-185
Journal of Materials Processing Technology (187-188):791-793.