Specification for high strength friction grip bolts and associated nuts and washers for structural engineering

Past three decades have seen the rapid development of high strength steel (HSS) in its application in structural engineering. However, so far the mechanical performance of a HSS beam-to-column connection has not been systematically studied, especially for bolted end-plate connections, the commonly employed beam-to-column connections in steel structures, which could restrict the application of HSS. Therefore, this paper aims to represent the basic methods, current achievements, recent applications, and the existing problems that lie in the way. In doing so, this paper is composed of three parts, experimental results, numerical analysis as well as component method. At the end, this paper indicates that future investigation should be based upon experimental analysis and proper finite element modeling, to verify a numerical model and to refine design standards.

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An Overview of the Recent Developments in Metal Matrix Nanocomposites Reinforced by Graphene

Materials ◽

10.3390/ma12172823 ◽

2019 ◽

Vol 12 (17) ◽

pp. 2823 ◽

Cited By ~ 15

Author(s):

Mehran Dadkhah ◽

Abdollah Saboori ◽

Paolo Fino

Keyword(s):

Metal Matrix ◽

High Performance ◽

Structural Engineering ◽

High Strength ◽

Structure Property ◽

Metal Matrix Nanocomposites ◽

Mechanical And Tribological Properties ◽

Processing Strategies ◽

Recent Developments ◽

Matrix Nanocomposites

Two-dimensional graphene plateletes with unique mechanical, electrical and thermo-physical properties could attract more attention for their employed as reinforcements in the production of new metal matrix nanocomposites (MMNCs), due to superior characteristics, such as being lightweight, high strength and high performance. Over the last years, due to the rapid advances of nanotechnology, increasing demand for the development of advanced MMNCs for various applications, such as structural engineering and functional device applications, has been generated. The purpose of this work is to review recent research into the development in the powder-based production, property characterization and application of magnesium, aluminum, copper, nickel, titanium and iron matrix nanocomposites reinforced with graphene. These include a comparison between the properties of graphene and another well-known carbonaceous reinforcement (carbon nanotube), following by powder-based processing strategies of MMNCs above, their mechanical and tribological properties and their electrical and thermal conductivities. The effects of graphene distribution in the metal matrices and the types of interfacial bonding are also discussed. Fundamentals and the structure–property relationship of such novel nanocomposites have also been discussed and reported.

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