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But the research on the stiffness and damping of joint interface with different materials’ is rather rare.
It is clear that the porous oily material improved the characteristics of the joint surfaces.
The properties of iron-based porous oily material inserts are shown in Table 1.
Acknowledgement This research was supported by National Natural Science Foundation of China (Grant No.51105006).
Journal of Mechanical Engineering Science, 1979(21): 25-32

Peat is described as naturally occurring, highly organic substance which derived primarily from plant materials [3].
Materials and Methods Peat soils originated from four different districts/region of Sarawak, namely Sibu, Dalat, Bintulu and Miri were reviewed in this paper.
Higher contents of total nitrogen in secondary forest peat soil could be related to its genesis or the origin of the parent materials and the water management [19].
Majid: Comparison of selected Soil Chemical Properties of Two Different Mangrove Forests in Sarawak, American Journal of Environmental Sciences 6 (5), (2010) p. 438-441
Majid, Comparison of Selected Chemical Properties of Peat Swamp Soil Before and After Timber Harvesting, American Journal of Environmental Sciences 6 (2), (2010) p. 164-167

Ductile range grinding of hard-brittle materials is an important and new research topic, researchers show that even in machining process of brittle solids, material can be removed by the action of plastic flow just as metal cutting.
The molecular dynamics method has spread from physics into the materials science; it is now entering the area of mechanical engineering, especially in ultra-precision and nanometer machining.
The simulation of nanometer grinding has been carried out using the model shown in Fig.1, where the workpiece and tool materials are assumed to be monocrystalline silicon with covalent bond and diamond, respectively.
So the material is removed and the grinding chip forms.
The results of the simulation support the following conclusions: (a) This fluctuation of grinding force can be understood the generation of dislocation slip and the plastic deformation in machining hard-brittle materials.

Lambert, A design methodology for mechanically fastened joints in laminated composite materials, Composites Science and Technology 66 (2006) 15 3004–3020
Eriksson, On the Bearing Strength of Bolted Graphite/Epoxy Laminates, Journal of Composite Materials 24 (1990) 12 1246–1269
Brown, High Strain Rate Effects for Composite Materials, American Society for Testing and Materials (ASTM STP, 1206), Composite materials.
Nakamura et al., Effect of Thermal Cycling on Microcracking and Strength Degradation of High-Temperature Polymer Composite Materials for Use in Next-Generation SST Structures, Journal of Composite Materials 36 (2002) 7 885–895
Gillespie, Process-Induced Stress and Deformation in Thick-Section Thermoset Composite Laminates, Journal of Composite Materials 26 (1992) 5 626–660

Introduction Gypsum and wood are the earliest used as building materials for human.
*Corresponding Author Yanlong Liu, Beihua University Key Laboratory of Wood Materials Science and Engineering of Jilin Province, Professor.
Journal of Shenyang Arch.
New Building Materials, 2003(8):1-3.
Journal of Building Materials, 2005,8(1):94-99.

Starova// Materials Science Forum. – 2019. - Vol.968. - P. 355-360.
Sotnikov, Position control and alignment of the CCM equipment, Materials Science Forum, 946 MSF (2019) 644-649.
Kirillova, Research and development of broaching methods on mandrel of large-sized pipe forgings, IOP Conference Series: Materials Science and Engineering, 709/4 (2020) 044104.
Kirillova, Future developments of a roll forming mill design algorithm, IOP Conference Series: Materials Science and Engineering 709/4 (2020) 044079.
Materials Today: Proceedings 11 (2019) 258-264.

Welding fixture (b) (a) (c) 2.3 Materials The plates Plates are CR440Y780T and TL 4225.
Guo, et al, Study of rare earth elements on the physical and mechanical properties of a Cu–Fe–P–Cr alloy, Materials Science & Engineering B. 147 (1)(2007) 1-6
Zou, et al, Surface modified long-life electrode for RSW of Zn-coated steel, Journal of Materials Processing Tech. 209(8) (2008) 4141-4146
Watanabe, et al, Mechanical properties of Cu–Cr system alloys with and without Zr and Ag, Journal of Materials Science. 43(3) (2008) 813-819
Krishna, et al, Enhanced Strength in Cu-Ag-Zr Alloy by Combination of Cold Working and Aging, Journal of Materials Engineering and Performance. 23(4) (2014) 1458-1464

Experimental Materials And Methods The experimental material is 45 steel hot rolled plate.
Effect of friction velocity on friction and wear properties of copper matrix friction materials [J], Journal of friction, 2009,29 (1): 89 -96
Microstructure and Properties of GCr15 Steel Surface Laser quenching [J], Journal of material Heat treatment, 2010 (4): 129-132
[6] Chen Y.B, Lu J, Ni X.W et al．Plastic penetration during laser heating of a metal plate[J]．Journal of Materials Processing Technology, 2008, 28(10)：9-15
[9] Chen Y.B, Lu J, Ni X.W et al．Plastic penetration during laser heating of a metal plate[J]．Journal of Materials Processing Technology, 2008, 28(10)：9-15

Synthesis of MgAl2O4 Spinel-Corundum Composite with Waste Refractory Wanli Bi School of High Temperature Materials and Magnesium Resource Engineering, University of Science and Technology Liaoning,Anshan 114051,China asbwl@126.com Keywords: Magnesia-alumina spinel; Waste slide plate; Waste Magnesia carbon brick; Composite.
Experimental In this paper, waste magnesia-carbon brick and slide plate were used as starting materials.
The chemical compositions of starting materials are shown in Table 1.
This results in an improvement of sintering performance of magnesia - alumina spinel - corundum composite materials[5,6].
Qiaoqin ZHOU: Journal of Fuzhou University(Natural Science Edition).

Preliminary Remarks The mathematical description of the processes of thermomechanical treatment of contracture materials is faced with the need to consider the elastic properties of materials at all stages of the product life cycle.
For isotropic hyperelastic materials, the strain-energy function can be expressed in terms of the invariants of the reversible strain tensor.
Bruhns, A thermodynamically consistent Eulerian description of finite elastoplasticity, Key Engineering Materials 340-341 (2007) 787-794
Polonik, Development of Approaches to the Creep Process Modeling under Large Deformations Applied Mechanics and Materials 249-250 (2013) 833-837
Dudko, Distribution Regularities of Shear Deformations in Incompressible Nonlinear Elastic Solids, Advanced Materials Research, 1040 (2014), 864-869