THE EFFECTS OF CONCENTRATION, SIZE, AND ORIENTATION ON THE HARDNESS OF NANOPARTICLES DOPED DIAMOND-LIKE CARBON FILM
Published In: INTERNATIONAL CONFERENCE ON FUTURE TRENDS IN STRUCTURAL, CIVIL, ENVIRONMENTAL AND MECHANICAL ENGINEERING
Author(s): CHEHUNG WEI , CHUN-HSIEN YU
Abstract: The inclusion of nanoparticles in a material is a common strategy to improve mechanical properties such as Young’s modulus or hardness. In most cases, the degree of improvement depends on the distribution and size of nanoparticles as well as the process condition. In order to investigate the effects of nanoparticles on the mechanical properties of a nanoparticles doped film, a nanoindentation finite element analysis is carried out. In this study, different concentration, size, and shape (spherical, elliptical) of nanoparticles were doped in diamond-like carbon (DLC) film on a silicon substrate and the mechanical property (hardness) is calculated based on a finite element analysis. The results indicate that for a given concentration, DLC doped with larger but less in quantites spherical nanoparticles has higher hardness than that in smaller but more dense counterpart. Meanwhile, large concentration of nanoparticle leads to higher hardness due to more population of nanoparticles. The ori
- Publication Date: 14-Jul-2013
- DOI: 10.15224/978-981-07-7021-1-65
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METOCEAN LOADS IN MALAYSIAN WATERS EXTREME VALUE ANALYSIS AND JOINT PROBABILITY
Published In: INTERNATIONAL CONFERENCE ON FUTURE TRENDS IN STRUCTURAL, CIVIL, ENVIRONMENTAL AND MECHANICAL ENGINEERING
Author(s): LIEW M.S , YEW G. Z , SELAMAT I.M
Abstract: Most offshore structures in the South China Sea (SCS) region are designed according to the American Petroleum Institute (API) standards which are based on harsher sea conditions. As the SCS sea-state conditions are calmer compared to those of the Gulf of Mexico and the North Sea, the use of API standards will overdesign the structures. Wind speed, wave height and current speed are among the metocean conditions that are considered in the design of offshore structures. Current practices treat the three types of metocean conditions independently of one another. This paper will employ extreme value analysis (EVA) and joint probability (JP) method to analyze measured metocean data and to determine the associated wind speed and current speed given the 100-year extreme wave height. The results show that the design loads can be reduced by 30% for design of offshore structures in the SCS region.
- Publication Date: 14-Jul-2013
- DOI: 10.15224/978-981-07-7021-1-67
- Views: 0
- Downloads: 0