Effect of Surface Roughness on Determination of Creep Parameter using Impression Creep Technique

2009 ◽  
Vol 1224 ◽  
Author(s):  
Wuzhu Yan ◽  
Bin Zhao ◽  
Zhufeng Yue
Keyword(s):  
Surface Roughness ◽  
Creep Test ◽  
Crucial Role ◽  
Indentation Creep ◽  
Impression Creep ◽  
Creep Parameter ◽  
Creep Properties ◽  
Properties Of Materials ◽  
Effect Of Surface

AbstractThe indentation creep test, especially the impression creep, exhibits a magic appealing in the determination of creep properties of small structures in industry for its simplicity, efficiency and non-destruction merits. Most of previous researches of indentation or impression creep neglect the effect of surface roughness of materials, which plays a crucial role in extracting creep properties of materials. The FE results showed that the surface roughness has no effect on the determination of creep exponent when the punching stress is larger than 150MPa. However, under a smaller punching stress the stress exponent is decreased due to the “Tuner” effect of asperities. The conclusions drawn in the present study provide an important guidance on experiment results amendment for impression creep technique.

Indenter misalignment in impression creep test: Uncertainty, correction and recommendation

2021 ◽  
pp. 030932472199765
Author(s):  
Suo Li ◽  
Dean Deng ◽  
Wei Sun
Keyword(s):  
Creep Test ◽  
Vertical Direction ◽  
Steady State Creep ◽  
Impression Creep ◽  
Finite Element Analyses ◽  
Empirical Formulas ◽  
Test Technique ◽  
Creep Properties ◽  
Miniature Specimen ◽  
Specimen Test

The impression creep test (ICT) method, as a miniature specimen test technique, has been used extensively to determine the in-service creep properties of power plant components. However, the experiment results of the ICT can be affected by some uncertainties associated with the inaccuracies of measurement, which have not been studied before. This paper presents some results of finite element analyses, to evaluate the effect of indenter misalignment on the results of the ICT, such as the steady-state creep deformation rate and the conversion parameters. The results obtained have shown that the angular misalignments of the indenter around horizontal directions have a relatively significant influence on the conversion parameters, and the misalignment around vertical direction has a much less significant effect. Empirical formulas were developed for the possible correction of the conversion factors. Finally, some recommendations on the control of the indenter and specimen alignment were given.

Effect of surface roughness on determination of bulk tissue optical parameters

2003 ◽  
Vol 28 (22) ◽  
pp. 2204 ◽  
Author(s):  
Xiaoyan Ma ◽  
Jun Qing Lu ◽  
Xin-Hua Hu
Keyword(s):  
Surface Roughness ◽  
Optical Parameters ◽  
Bulk Tissue ◽  
Effect Of Surface

scholarly journals Effect of surface roughness in the determination of the mechanical properties of material using nanoindentation test

Scanning ◽  
2013 ◽  
Vol 36 (1) ◽  
pp. 134-149 ◽  
Author(s):  
Yang Xia ◽  
Maxence Bigerelle ◽  
Julie Marteau ◽  
Pierre-Emmanuel Mazeran ◽  
Salima Bouvier ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Nanoindentation Test ◽  
Effect Of Surface

Effect of surface roughness of incident region on determination of tissue optical properties

2008 ◽  
Vol 55 (8) ◽  
pp. 1219-1229
Author(s):  
Meixiu Sun ◽  
Chunping Zhang ◽  
Shengwen Qi ◽  
Yeqing Su ◽  
Jianguo Tian
Keyword(s):  
Surface Roughness ◽  
Optical Properties ◽  
Tissue Optical Properties ◽  
Effect Of Surface

scholarly journals Influence of surface roughness on fatigue life of machine elements – the development in experimental investigations and simulations

Mechanik ◽  
2019 ◽  
Vol 92 (5-6) ◽  
pp. 307-313 ◽  
Author(s):  
Wit Grzesik
Keyword(s):  
Surface Roughness ◽  
Fatigue Life ◽  
Construction Materials ◽  
Fatigue Tests ◽  
Experimental Investigations ◽  
Fundamental Information ◽  
Aerospace Alloys ◽  
Machine Elements ◽  
Effect Of Surface

In this paper fundamental information on the influence of surface roughness on fatigue life/limit stresses of machine elements made of different construction materials using different machining/manufacturing processes are presented. The rules for the assessment of surface finish influence represented by the set of microscopic notches on the real machined surfaces, which allow the determination of the stress concentration factor and the correction of a fatigue life limit, are provided. The results of fatigue tests are compared with computed data and predictions using FEM based simulations. The effect of surface discontinues resulting from surface roughness are related to machine elements made of steels, aluminium alloys, aerospace alloys – titanium and nickel based superalloys and composite reinforced by graphite fibres.

Effect of surface roughness on the determination of tissue optical properties

Optik ◽  
2010 ◽  
Vol 121 (4) ◽  
pp. 373-377
Author(s):  
Meixiu Sun ◽  
Chunping Zhang ◽  
Shengwen Qi ◽  
Yeqing Su ◽  
Jianguo Tian
Keyword(s):  
Surface Roughness ◽  
Optical Properties ◽  
Tissue Optical Properties ◽  
Effect Of Surface
Sign in / Sign up

Export Citation Format

Share Document