Recent Advances in Structural Integrity Analysis - by Lin Ye

By Lin Ye

The complaints of the overseas Congress (c) comprise approximately a hundred and twenty papers chosen out of a hundred and sixty papers submitted for displays at APCF/SIF-2014, to be held in Sydney, Australia, December 9-12, 2014, and uniting the Asian-Pacific convention on Fracture and energy 2014 (APCFS-2014) with the overseas convention on Structural Integrity and Failure (SIF-2014). The congress could be hosted via The college of Sydney and co-organized via Australia Fracture team (AFG), the chinese language Mechanical Engineering Society, fabrics establishment (CMES-MI), the Korean Society of Mechanical Engineers, fabrics and Fracture department (KSME-MFD) and the japanese Society of Mechanical Engineers, fabrics and Mechanics department (JSME-MMD). The congress follows the sequence of the former very winning APCF and SIF overseas boards, specifically, APCFS 2012, Busan and the 8th SIF, Melbourne, 2013.

  • Characterisations of advanced mechanisms of wear and tear accumulation and failure
  • Application of recent multi-scale modelling techniques in difficulties linked to structural integrity
  • Development of extra actual applied sciences for structural harm assessment

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1 (b) shows engineering stress-strain curves for three tensile specimens tested at 288°C at three different strain rate. At high strain rate, both the ultimate tensile strength and the fracture elongation were significantly lower than for quasi-static testing rates. (a) (b) Fig. 1 (a) Specific details of a tensile specimen (b) Engineering stress-stain curve for A106 Gr. B For fracture toughness test, four tests were performed, as summarized in Pipe Fracture Encyclopedia. In this paper, one test was considered to analyze high strain rate effect.

ESC failure mechanism of polymer is different from stress corrosion cracking (SCC), in terms of no existence of the chemical degradation of polymers by contacting with adverse environments. ESC is induced by sorption and diffusion of the particular liquid or gas state non-reactive agents into the mechanically-loaded polymer medium, particularly into the amorphous region. Generally this phenomena makes molecular chains in amorphous region become soften and plasticized. In case of high density polyethylene (HDPE), diffused detergents play a role of a kind of lubricant to the tie chains in amorphous regions so that inter-lamella cohesive strength deteriorates due to the loosening of tie molecules (3).

Choi Department of Mechanical Engineering, Korea University, Korea ABSTRACT Environmental stress cracking (ESC) of polymeric materials is induced by the penetration and diffusion of surface agents in the stressed polymers, which lubricates the mobility of polymer chains. In this paper, ESCR tests of high crystalline polypropylene (HCPP) were conducted by use of modified notched constant load test in contact with two different scent oils. The relationship between the lifetime and the loading condition were observed for two types scent oil.

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