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Material model The hardwood projectile is modeled as linear elastic material *MAT RIGID.
The elastic-plastic material model *MAT PLASTIC KINEMATIC is adopted to model cold rolled stainless steel.
Materials & Design. 2014;60:409-23
[4] Chen X., Li Q., Perforation of a thick plate by rigid projectiles, International Journal of Impact Engineering, 28 (2003) 743-759
[7] Børvik T., Langseth M., Hopperstad O., Malo K., Ballistic penetration of steel plates, International Journal of Impact Engineering, 22 (1999) 855-886

Controlled Synthesis of Uniform Silver Nanospheres†, The Journal of Physical Chemistry C 114(2010), 7427-7431
Synthesis of uniform silver nanoparticles with a controllable size, Materials Letters 63(2009), 2236-2238
Production of Ag nanocubes on a scale of 0.1 g per batch by protecting the NaHS-mediated polyol synthesis with argon, ACS applied materials & interfaces 1(2009), 2044-2048
An efficient way to prepare silver nanorods in high concentration by polyol method without adding other metal or salt, Materials Chemistry and Physics 134(2012), 686-694
Shape-controlled synthesis of gold and silver nanoparticles, Science 298(2002), 2176-2179.

Results are discussed in connection to the theory of composite materials and a micro-mechanical explanation of the general problem of marble deterioration is suggested.
Conclusions Although not easy, stress measurements in geological materials, such as marble, are feasible and valuable characterization can be provided.
Denton, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 30 (1993) 1531-1537
Tschegg, Int Journ Earth Sciences, 89 (2000) 170-182
Hashin, Journal of Applied Mechanics, 29 (1962) 143-150.

Journal of Structural Engineering, 2007, 134(7): 1215-1228
Journal of Engineering Mechanics, 2003, 129(5): 548-557
Journal of Structural Engineering, 1986, 112(4): 764-780
Journal of Structural Engineering, 1986, 112(2): 342-361
Materials and Structures, 2007, 40: 605–613.

References [1] Goltermann P.Chloride ingress in concrete structures:extrapolation of observations[J].ACI Materials Journal,2003，100(2):114-119
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Three-level Finite Difference Technique for the One-dimensional advection- diffusion Equation[J].Journul of Yancheng Institute of Technology Natural Science Edition.,2009,22(1): 22-25(In Chinese) [6] Shaohua Yang.
[J] Journal of ShangQiu Teachers College, 2009,25(3):48-50(In Chinese) [7] Huajie Li,Wenxiang Lu,Dexian Huang.

Experiment Materials.
Xiao: submitted to Journal of Southeast University (2013).
Shi: submitted to China Powder Science and Technology (2012).
Xia: submitted to Material Letters (2007).
Zhang: submitted to Journal of Petrochemical Universities (2003).

So a critical stress σf is defined that when the applied stress is less than it, the creep fracture will not occur, and when the applied stress is greater than it, the creep deformation will continue until the creep fracture.This critical stress is called the long-term strength of materials [2].
At this point there is only one sticky component in the model, and its constitutive equation is: (7) It can be seen that the whole creep process of materials is expressed by the model.
Acknowledgements This work was financially supported by the ShanDong Science Programe (2010GFS10607, 2008BS9025).
Journal of Hydraulic Engineering.
Journal of Hydraulic Engineering.

Material parameters are as follows: Elastic modulus is,density is , Poisson's ratio is .All the sectional characteristic are shown in Table 1.
[3]ZengGuangwu,　XiaoWei,　Cheng Yuansheng,SOUND ISOLATION OF COMPOSITE STRUCTURE CONSISTING OFMULTI PHONONIC CRYSTALS, JOURNAL OFVIBRATION AND SHOCK, vol.26(2007), p.84-86
[4] Kaouk M,Zimmerman D C,Simmermacher T W,Assessment of damage affecting all structural properties using experimental modal parameters,Journal of Vibration and Acoustics,Transactions of the ASME(2000), p.456-462
[5] Ojalvo I U,Pilon D,Diagnostics for geometrically locating structural math model errors from modal test data.Proceedings of the 29th AIAA Structures,Structural Dynamics and Materials Conference,Williamsburg,(1988),p.1174-1186
[6] Shi Z Y,Law S S,Zhang L M,Improved damage quantification from element modal strain energy change, Journal of Engineering Mechanics, vol.128(2002) ,p.825-844.

More recently, different nano-sized materials are being extensively investigated because of many advantages such as enhanced active sites and larger surface areas.
Materials and methods All analytical reagents were used.
Ramkumar, Electrospinning of Nanofibers, Journal of Applied Polymer Science, 96 (2005) 557-569
Ramaseshan, Electrospun nanofibers: solving global issues, Materials Today, 9 (2006) 40-50
Yoshikawa, Photocatalytic activity for hydrogen evolution of electrospun TiO2 nanofibers, Applied Materials and Interfaces, 1 (2009) 1140–1143.

References [1] Fan Yingfang,Zhang Yingzi,Hu Zhiqiang:Journal of building materials:2006,vol(9) nov(1).
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[7] Jin Weiliang: Corroded Concrete Structures (Science Publications, Beijing 2011).
[8] Niu Ditao: Durability and Life Forecast of Reinforced Concrete Structure (Science Publications, Beijing 2003).