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Introduction With the fast development of economy, packaging science has bursted like a rocket, and therewith packaging dynamics[1].
In accordance with the selected specification, the cushion material is plastic foam.
All of the finite element models adopted the solid 92 element, both the experimental box and package have adopted the isotropic structure material simulation. main material parameters and specification of various parts are shown in TableI.
The simulation result has shown that the optimized model can satisfy the rigidity requirement and also save materials which fitted the concepts of environmental friendly.
References [1] Zhong Yuning, Long Shengrong and Zhang Yepeng, Simulation Study on the Impact of Cushion Package Structural Parameters with Prior Elements on the Cushion Performance [conference paper]-2004; [2] GU Xiao-yong and ZHANG Li-ming, Study on the Drop Strength of Shell Component based on ANSYS [journal article]- Coal Mine Machinery, 2010, 31(2); [3] Hua Li, Drop Simulation Analysis of Washing Machine Transportation Package based on ANSYS/LS-DYNA [journal article]- Packaging Engineering, 2007, 28(9); [4] An Erfeng, Li Lei and Yang Jun, Study on the Shock Mechanic Performance of Classic Glass Material[J], Journal of Beijing Institute of Technology, 2010,30(2):127-130; [5] JESD22-13104-B.

Operating Conditions and Two Phase Flow at the Cathode Beside the changes in the materials the operating conditions also have a huge impact on the stability of the MEAs and on the systems efficiency.
Stolten, Journal of Fuel Cell Science and Technology, 9 (2012) 031011-031011
Roth, Journal of Power Sources, 196 (2011) 5538-5545
Müller, Journal of Power Sources, 124 (2003) 371-384
Manke, Journal of Power Sources, 195 (2010) 4765-4771

From the late 70s, a large number of experiments verified that the stress relaxation and creep of polymer, synthetic rubber, fiber, glass, ceramics and other materials can be described by fractional derivative constitutive relation ideally [3-5].
International Journal of Mechanical Sciences,Vol,37 (1995), p. 753 [3] Rabotnov YuN,Papernik Lkh and Zvonov EN.
Journal of Rheology, Vol. 27 (1983), p. 201 [5] Bagley R.L..
AIAA Journal, Vol. 27 (1998), p. 1412 [6] Liqun Chen, Changjun Cheng.
Journal of Rheology, Vol. 30(1986), p. 133

The influence of high velocity thermal spraying methods on top surface topography of WC-Co coatings Hanna Myalska1,a, Jakub Wieczorek1,b, Krzysztof Szymański1,c, Grzegorz Moskal1,d 1 Silesian University of Technology, Inst. of Materials Science, Krasińskiego 8, 40-019 Katowice, Poland a hanna.myalska@polsl.pl, b jakub.wieczorek@polsl.pl, c krzysztof.szymanski@polsl.pl, d grzegorz.moskal@polsl.pl Keywords: WC-Co coatings, high velocity thermal spraying, topography.
Shoenung, Microstructure and wear resistance of WC-Co by three consolidation processing techniques, International Journal of Refractory Metals and Hard Materials 27 (2009) 344-349
Szczucka-Lasota, New generation of protective coatings intended for the power industry, Journal of Materials Processing Technology 164-165 (2005) 850-855
Szymański, Oxidation models of the growth of corrosion products on the intermetallic coatings strengthened by a fine dispersive Al2O3, Journal of Materials Processing Technology 164-165 (2005) 935-939
Allibert, Sintering features of cemented carbides WC-Co processed from fine powders, International Journal of Refractory Metals and Hard Materials 19 (2001) 53-61

The hydrated cations in the interlayer space of vermiculite crystal layers have good exchangeability, so organic hydrophlogopite and organic/inorganic nanometer composite materials can be prepared by cation exchange; the modified hydrophlogopite has been used in the field as, for example, a catalyst and carrier, waste water treating compound, and adsorbent, etc.
[4] D.S.Williams and R.K.Thomas: Journal of Colloid and Interface Science, Vol. 255 (2002), p. 303
Castro, et al.: Journal of Colloid and Interface Science, Vol. 256 (2002), p. 314
[6] Pingxiao Wu, Nengwu Zhu, Zhi Dang, et al.: Journal of Functional Materials, Vol. 37 (2006), p. 83
[13] Tomasz Kwolek, Maciej Hodorowicz, Katarzyna Stadnicka, et al.: Journal of Collold and Interface Science, Vol. 264 (2003), p. 14.

To obtain high strength and low density materials, spark plasma sintering (SPS) process is introduced to prepare amorphous Al-based metal foams.
Ohyanagi: Journal of Materials Science, Vol. 41 (2006), p. 763-777
Cao: Materials Science and Engineering R, Vol. 63 (2009), p. 127-287
Cao: Materials Characterization, Vol. 54 (2005), p. 394-398
Omori: Materials Science and Engineering A, Vol. 287 (2000), p. 183-188

Matt1, a 1Free University of Bozen-Bolzano, Faculty of Science and Technology, Piazza Università 5, Bolzano, Italy adominik.matt@unibz.it Keywords: Value stream mapping, manufacturing system design, cable tray systems, industrial case study Abstract.
In a sheet metal manufacturing environment, volumes and weights of the transported raw materials, components or finished goods may vary widely.
J. (2003), “Case study research methods for theory building”, Journal of Business & Industrial Marketing, Vol. 18 No. 6-7, pp. 493-508
[10] Lian, Y. and Van Landeghem, H. (2002), An application of simulation and value stream mapping in lean manufacturing, in 14th European Simulation Symposium, 2002 (SCS Europe BVBA), available at: http://www.scs-europe.net/services/ess2002/PDF/log-11.pdf (accessed: 10.11.2012) [11] Harris, R., Harris, C. and Wilson, E. (2003), Making Materials Flow, The Lean Enterprise Institute: Massachusetts
Journal of Manufacturing Technology Management, Vol. 19, No. 7 and 8, pp. 783-797

There are exists positive thermal expansion property for almost all materials.
Using the optimum combination of the fiber reinforcement and the polymer matrix, we may obtain some materials with high performance of thermal expansion property.
Therefore, The objective of this work is to develop the materials with negative or low thermal expansion property by using the high performance fibers.
The fibers are arranged in one direction, and the fabricated materials are unidirectional composites.
As for the other two materials of CFRP and AFRP, a low value of the CTE is observed. .

This is because the grinding fineness improves help to improve the cleavage of the phosphate rock materials and gangue minerals, while the finer grinding dolomite dissolution accelerated, so the pH of the flotation pulp is increased, resulting in the decline in flotation recoveries.
Journal of earth sciences and environment. 29(2007)362-364 [3] M.
Zhang, Study on material composition and ore characteristics of REE in Zhijin dolomitic phophorite, J.
Journal of rare earths. 24(2006)413 [7] H.
Journal of university of science and technology Beijing. 33(2011)1071-1073 [15] W.

Material Science Industrial safety helmets protect the head from falling objects by absorbing mechanical energy.
Natural fibers and ABS are recommended as helmet materials.
Results and Discussion Material Science The selection of materials for the safety helmet is based on commonly used materials according to the ANSI/ISE Z89.1-2014 standard, Type I, Class G and E.
Comfort HDPE is commonly used in safety helmet materials.
Pramanda, and Suheri, "An anthropometric study of head for designing ergonomic helmet for Acehnese adults," IOP Conference Series: Materials Science and Engineering, vol. 722, no. 1, Art. no. 012033, 2020, doi: 10.1088/1757-899X/722/1/012033