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Fig.2 Layout of the blast holes in the driving face Implementation of the damage model into FLAC3D code 3.1 Damage evolution law There are a lot of initial defects such as fractures and joints in the natural rock which can be regarded as a brittle damage materials containing initial injury.
International journal of rock mechanics and mining sciences & geomechanics abstracts, 1996, 33(3) :245-254
International Journal of Rock Mechanics and Mining Sciences, 1997, 34(2) : 217-231
Continuum modeling of explosive fracture in oil shale[J] International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1980, 17(3):147-157
International Journal of Rock Mechanics and Mining Sciences 48.2 (2011): 210-218

There are many kinds of materials which are suitable to be used in the manufacturing of biopolymers.
Experimental Materials.
Agnelli: submitted to International Journal of Polymeric Materials (2002)
Fennema: submitted to Journal Food Scinece (1991)
Garcia: submitted to Materials Science and Engineering (2009). [26] J.B.

Fund: Graduate Innovation Fund of Guizhou University (no. 2012042); Guizhou province science and technology fund (qian J word [2011] no. 2011); Guizhou university science research foundation of youth (no. (2010) 053).
Effect of Mass Fraction of Palygorskite Nano-particles on Phenolic Resin and Tribological Behavior of Friction Materials by in-situ Method [J].
JOURNAL OF MATERIALS ENGINEERING, 2008, 10:187-190
Preparation of Palygorskite Nanometer/Phenolic Resin and Performance of Its Friction Materials [J].
POLYMER MATERIALS SCIENCE AND ENGINEERING, 2009, 25(2): 59-61.

The classification of beer as a natural food product places a strict specification that all inputs into the brewery process, including the reuse materials, must meet the highest standards of food-grade ingredients [7].
South African Journal of Science. 112(3-4) (2016) 1-8
Journal of Environment and Earth Science. 2(4) (2012) 31-40
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Effect of Y Addition on Wear Property of Ni-Mn-Ga Shape Memory Alloys Ailian Liu1, a, Jiawen Xu1, a, Li Gao2, b, Bingyu Qian1, a 1College of Materials Science and Engineering, Heilongjiang Insititute of Science and Technology, Harbin, China,150027 2 College of Engineering Science and Technology, Shanghai Ocean University, Shanghai, China, 201306 a liuailian@yeah.net, xujiawen@263.net, b gaoli.99@163.com Keywords: Ni-Mn-Ga alloy; Rare earth element Y; Wear Property Abstract.
It is well known to all that the wear of materials is one of the three failure forms.
Wang, Journal of Rare Earths. 22 (2004) 875
Wang, Journal of Rare Earths. 22 (2004) 632
Advanced Materials Research. 2011, 299-300:645-648

Introduction A composite material is a new type of engineered material consisting of two or more two materials to obtain better properties than each of the constituent materials.
William, Material Science and Engineering, John Willey&Son, Inc., New York, 1994
Sulaiman, The Properties of the Washed Empty Fruit Bunches of Oil Palm, Journal of Physical Science 24 (2013) 117–137
Series: Materials Science and Engineering 184 (2017) 012046
Ergün, Mechanical Properties of Epoxy Composite Materials Produced with Different Ceramic Powders, Journal of Materials Science and Chemical Engineering, Vol.7 No.12, 2019 [27] M.

Introduction In terms of solid state physics, the materials belong to ultrafine particles (200-500nm) or nanomaterial (<100nm) when the particle size reduced to 1µm or less.
Zeolite is a kind of micro porous crystal materials with uniform pore structure and its special structure is composed by tetrahedral TO4(T=Si or Al) that connected through common oxygen atoms.
According to growth mechanism of zeolite A [1], the initial aluminosilicate gel was formed with high concentration after the raw materials mixed.
Furthermore, both of them are closely related to solution saturation of active materials, and higher saturation result in faster and more crystal nuclei formation.
Acknowledgments This work was financially supported by Yunnan Natural Science Foundation(2010CD026) and Kunming University of Science and Technology Science Foundation(kkz3201205022).

Materials and Methods Analysis model of structure.
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These two phenomena reflect the elastic effects of beam's material.
Color figures are welcome for the online version of the journal.
Clem: submitted to Journal of Materials Research (2003) [5] P.G.
Wierzbicki, Structural Crashworthiness and Failure, Elsevier Applied Science, London, 1993, pp. 341-384
Yu, Dynamic behaviour of a clamped plastic beam with cracks at supporting ends under impact, ASME Journal of Pres.