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The mechanical property of these materials is very complicated and different from each other.
Therefore, it is impossible to express the materials’ performance truly in the crash analysis, so the only way of solving it is to simplify the materials’ model.
In order to express the materials’ performance in the analysis to the largest extent, all the commercial crash simulation software has developed relevant materials’ model to meet the engineering requirement.
Fekete:SAE Paper No. 2000-01-0625 [6] Masuda T, Kobayashi T, Wang L et al: Materials Science Forum 2003,426–432(1) , p. 285 [7] R.
Salisbury et al: International Journal of Impact Engineering 32 (2005) , p. 541

This condition is mainly attributed to the small number of graphite particles of the same quality in composite materials with the same content of conductive graphite raw materials when the graphite particle size is large.
The content of the phenolic resin in the composite materials is determined by studying the influence of phenolic resin content on the properties of composite materials.
Frontiers of Materials Science, 2019, 13(3): 217-241
Journal of Applied Polymer Science, 2019, 136(11): 47183
Science and Engineering of Composite Materials, 2018, 25(6): 1177-1186

The use of composite materials as coatings was studied in the study [5].
The features of the redistribution of materials in polymer stamps and other structures with restrictions were studied in articles [22-26].
Gibadullin, Thermoplastic polymer composites production by automated fiber placement method, Key engineering materials 836 (2020) 78-83
Osminko, Improving the wear resistance of bushings through polymer coatings, Key engineering materials, 836 (2020) 136 – 141
Saparov, Design and optimization of die body for polymer extrusion, Key engineering materials, 841 (2020) 387 -392

However, window products on the domestic construction materials market varies greatly,which not only hinders consumers to select economical and healthy product,but also would block the development of window products.
Weighted TOPSIS combined with characteristics of window materials, considered indicators such as economical, energy-saving, environmental,healthy and comfort, safety, aiming at the current situation of window material mainstream on the domestic market, comprehensive evaluation for window material which is suitable for china’s national condition, to provide support for the healthy development of window material market. 1 A design of the for energy-saving window material comprehensive evaluation 1.1 Establishment of the index system Index system of window material comprehensive evaluation should reflex indicators such as economical, energy-saving, environmental,healthy and comfort, safety, after data compilation and analysis,on the premise of considering various elements that affect the goodness of window materials,setting up comprehensive evaluation index system for window materials.
System hierarchical structure and subordination is shown in Table 1. 1.2 Index system description According to characteristics of each index,evaluation indexes are divided into two categories:Q-Type index and L-Type index.Q(quality)refers to the quality of window materials,they are benefit-oriented indexes,the greater it’s value,the better; Q(quality)refers to environmental, energy,resource,economical load of window materials,they are cost-oriented indexes,the smaller it’s value,the better.
[4] Bai Xiaoping,Fan Jia, A New Optimization Model about Enterprise Equipment Investment Project based on Integrated Entropy Weight and Fuzzy Matter Element, Research Journal of Applied Sciences. 10 (2012) 3885-3890
[7] Zheng Jun-wei.Mean-quantization Algorithm for Gray correlation Degree , Journal of Hangzhou Dianzi University. 8 (2010) 165-168

Nevertheless, their assumption of incompressibility is not appropriate for the concrete materials.
Doing so is applicable for pressure-independent materials, but not for the pressure-dependent concrete materials.
An improved Dharan model which could reflect the compressibility of concrete materials was derived.
Chen, et al, Journal of Southwest University of Science and Technology, 23 (2008) 15-18
Perry, Materials and Structures, 24 (1991) 425-450

By gradually varying the volume fraction of constitute materials, their material properties exhibit a smooth and continuous change from one surface to another.
Material Properties Generally speaking, most of the FGM are employed in high-temperature environments and many of the constituent materials may possess temperature-dependent properties.
Shiota, Proceedings of the First International Symposium on Functionally Gradient Materials, Sendai, Japan, 1990
International Journal of Mechanical Sciences 03 (2002) p.561-584 [5] Yuxin Hao, L.H.
Advanced Materials Research Vols. 415-417 (2012) pp 2151-2155 [7] M.

Study on the new wall insulation materials of vitrified micro bubbles Jiang Zhu, Guozhong Li a* School of Material Science and Engineering, University of Jinan, Jinan, Shandong, 250022, China a mse_ligz@ujn.edu.cn, * correspondence author Keywords: Vitrified micro bubbles, Expanded perlite, Wall insulation materials, Orthogonal experiments, Mechanism.
However, the inflammability of these organic polymer materials poses high risks in their applications.
Compared with organic materials, inorganic insulation materials are of some advantages, such as non-flammable, ageing resistance, smaller coefficient of variability, higher bond strength, etc.
The performances of wall insulation materials of expanded and vitrified micro bubbles were collected in Table 6.
References [1] Heng Wang and Yong Liao: JOURNAL OF SOUTHWEST UNIVERSITY OF SCIENCE AND TECHNOLOGY Vol. 27(6) (2010), p. 36 (In Chinese) [2] Shengyuan Zhang, Xiu Yang and Yi Jiang: ENERGY OF CHINA Vol. 30(7) (2008), p. 37-39 (In Chinese) [3] Bozhang Qian and Jianfang Zhu: CONSTRUCTION ENERGY CONSERVATION Vol. 37(2) (2009), p. 57 (In Chinese) [4] Tianshu Gu, Lianyu Xie and Ge Chen: BUILDING ENERGY CONSERVATION AND WALL THERMAL INSULATION.

dc=0.15EHKICH2 (1) Where E is the modulus of elasticity of materials,Gpa; H is the hardness of materials,mpa;KIc is the static fracture toughness of materials, mpam1/2.
Acknowledgements This research was sponsored by the National Natural Science Foundation of China (No.51205112) and the National Natural Science Foundation of China (No.51575163).
Advanced Materials Research, 69 (2009) 133-137
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Journal of Chinese Ceramic Society. 34 (2006) 102-106

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These materials were collected locally from the Hyderabad region.
[12] Demirel B., “The effect of the using waste marble dust as fine sand on the mechanical properties of the concrete”, International Journal of the Physical Sciences, V.5, Issue 9, pp. 1372-1380, 2010
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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering, 16(1), 59 – 69
Australian Journal of Basic and Applied Sciences, 3(3), 1616 - 1622