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With the increasing use of composite materials in various engineering structures, it is of growing importance to develop reliable and effective nondestructive evaluation methods to assess and monitor the mechanical serviceability and safety of in service composite structures.
The material parameters are given in Table 1.
This project is supported by Funding of NSFC (50808054), Acknowledgement Shenzhen Durability Center for Civil Engineering, Shenzhen University (SZDCCE 10-08) and the team Programs for Science and Technology Development of Shenzhen University (T200901) References [1] Choi H.Y. and Chang F-K: “Model for predicting damage in graphite/epoxy laminated composites resulting from low-velocity point impact”, Journal of Composite Materials, (1992), v.26.2134-2169 [2] Geubelle, Philippe H. and Baylor, Jeffrey S., “Impact-induced delamination of composites: a 2D simulation”, Composites Part B: Engineering, Volume 29, Issue 5, (September1998), pp.589-602 [3] Khuri-Yakub B.T., Degertekin F.L. and Pei J., “Dry contact ultrasonic sensors for structural monitoring”.
Ezekiel, “A Novel Fiber Optic Delamination Detection Scheme: Theoretical and Experimental Feasibility Studies”, Journal of Intelligent Material, Systems & Structures, (1990) 10(4), 314-321 [7] Xu, Y., Leung, Christopher K.Y., Yang, Z.
O., “Optical fiber instrumentation and applications”, Proceedings of SPIE -- Smart Materials, Structures, and Integrated Systems, Alex Hariz, Vijay K.

It was not only the most important channel to connect the southwest but also the major channel to transport military supplies, water transport of grain to the capital and civil goods and materials.
According to historical materials, goods were transported continuously to Huguang and Jiangzhe areas by the Wushui Route from Yunnan and Guizhou in Ming Dynasty.
According to historical materials, there were more than 400 commercial tenants in Tongren which is the distribution center and sales market for industrial products imported from other regions, such as Changde and Hankou.
Journal of Huaihua University, 2008.04 [6] Luo Yunsheng.
Journal of Hunan Administration Institution, 2010.03

School of Earth and Space Sciences, Peking University, Beijing, China 2.
The eddy numerical computation of ferromagnetic materials has established a relatively complete finite element model [1].
Materials Evaluation ,1983 ,41 (11) :1389-1394
Journal of Iron and Steel Research, 2003,15(2),59-61
Advanced Materials Research. 2010, 146, 394-399.

Introduction Constructed outdoors, using materials with varying life expectancies, RC buildings are prone to damage from the environment, vibration, load stress and natural hazards such as hurricane, earthquake, flood.
This paper focuses on the early warning of the material limit stress or strain in the situation of real-time monitoring.
Though this method observed the uncertainty of load response, it ignored material variability.
Implementation of in situ material test makes it possible to update the information of the serving material.
References [1] Jing Wang, Li Yang, Hui Liu: Journal of HUST(Urban Science Edition) , In Chinese, Vol. 27(2010), p.55-58 [2] Huichun Yan, Na Yang: Journal of Wuhan University of Technology, In Chinese, Vol.32(2010), p.266-270 [3] Information on http://en.wikipedia.org/wiki/Reliability [4] J.G.

Engineers have tried numerous strategies to mimic these structures and incorporate them into various bio-inspired materials and devices [1].
These magnetic particles have also been impregnated in porous materials like tissue paper to make magnetic responsive actuator [3].
The silicone rubber gives an economical elastic base material to hold magnetite particles.
Journal of Micromechanics and Microengineering, 30(7), p.075012
Current Opinion in Solid State and Materials Science, 6(4), pp.329-334

When the operating parameters, the dimensions and the material properties of connecting structure components are given, the stress of the gasket SG can be solved basing on the deformation coordination equation (1).
The basic parameters of the calculation and the material of the key components are listed in Table 1.
Analysis results indicates that the sealing performance of the connecting structure is sensitive to the bolt-preload, elasticity modulus of flange material, gasket width and the bolt diameter.
,KuiJishan, “Bolt loads and gasket stresses in bolted flanged connections”, Nanjing institute of chemical industry academic journal, 1988, 10(4) ,66-73
Analytical Modeling of the Contact Stress With Nonlinear Gaskets．Journal of Pressure Vessel Technology, FEBRUARY 2002, Vol. 124/47 [10]Lijun Ji, Yunfeng Si, Hongfei Liu, Xiaoli Song, Wei Zhu, Aiping Zhu, “Application of orthogonal experimental design in synthesis of mesoporous bioactive glass”, Microporous and Mesoporous Materials, 2014,184,122-126.

Experimental procedure Materials.
In this research, the material used was Sn-Cu-Ni (SN100C) solder supplied by Nihon Superior Co.
Ltd, Japan for supporting the research effort through materials and finance with grant no. 9008-00003.
Journal of Materials Transaction
N., Aisyah Marini A: A Review of Solder Evolution in Electronic Application, International Journal of Engineering and Applied Science, Vol 1, (2012), p.1-10 [8] Keith Sweatman: Hot Air Solder Leveling in the Lead-Free Era.Global SMT & Packaging, (2009)

Materials and Sample Preparation Two different thermoplastic composites were employed in this study.
Fig. 6. a, b) Images of profilometry before and after healing and DCB test for both materials. c, d) Micrographs for both sides after DCB test.
Rezende, Processing of high-performance composites based on PEEK by aqueous suspension prepregging, Materials Research, 13 (2010) 245–252
Journal of Composite Materials, 21(11) (1987) 1017–1055
Materials 12 (2019) 1607.

Different from materials used in former research [12], these foam sheets have higher density and both sides are smooth.
Bauer, Piezo-, pyro- and ferroelectrets: soft transducer materials for electromechanical energy conversion, IEEE Trans.
Huang, Materials and mechanics for stretchable electronics, Science, 327 (2010), 1603-1607
Materials Sci., 44 (2009) 2459-2465 [12] Xiaoqing Zhang, Xinwu Zhang, Qiong You, Gerhard M.
Havriliak, Dielectric and Mechanical Relaxation in Materials.Hanser, Munich, 1997

Introduction Both fillers and fibers are two most important materials used in paper products.
Talc is the primitive filler materials used in paper product.
This indicated that precipitated filler materials are likely to be welcomed.
Kim, Journal of Materials Processing Technology, 186 (2007) 367-369
Wasanapairnpong, Key Engineering Materials 608 (2014) 97-102