Fatigue Life Prediction of Commercially Pure Titanium after Nitrogen Ion Implantation

Ali, Nurdin; Mustapa, Mohammad Sukri; Ghazali, Mohd Imran; Sujitno, Tjipto; Ridha, M.

doi:10.15282/ijame.7.2012.16.0081

Cited by 15 publications

(10 citation statements)

References 25 publications

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“…Several semiconductors such as zirconium oxide [14], gallium oxide [15], magnesium oxide [16], zinc sulfides [17], cadmium sulfides [18], bismuth sulfide [19], graphitic carbon nitride [20] and titanium oxide (TiO2) [21] have been employed as photocatalyst. Among all, TiO2 has been the widely reported photocatalyst because of its unique properties, high stability, availability and non-toxicity [22][23][24][25]. However, photocatalytic activity of TiO2 is limited due to large bandgap energy and electrons-holes recombination problem.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

Shehzad¹,

Johari²,

Murugesan³

et al. 2018

INT. J. AUTOMOT. MECH. ENG.

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Photocatalytic reduction of CO2 into solar fuel such as methane and methanol, is an attractive approach to simultaneously solve the energy crisis and global warming problem. Herein, comparative photocatalytic activity of graphene oxide nanosheets have been investigated for photocatalytic reduction of CO2 into methane and methanol in continuous gas and liquid phase photoreactor system. The graphene oxide sheets were prepared according to Tour's method. The chemical composition and optical properties was evaluated through XPS and UV-vis spectroscopy. Graphene oxide nanosheets exhibited maximum amount of 224.87 μmol/g.h methanol and 14.8 μmol/g.h methane in liquid and gas phase system, respectively. Higher yield of methanol in liquid phase compared to methane in gaseous system can be attributed to dispersion of graphene oxide sheets in water. Hence, graphene oxide nanosheets are efficient photocatalyst for CO2 reduction into methanol. Nevertheless, further research is essential to improve the photostability of graphene oxide sheets for real application of photocatalytic CO2 reduction.

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Section: Introductionmentioning

confidence: 99%

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

Shehzad¹,

Johari²,

Murugesan³

et al. 2018

INT. J. AUTOMOT. MECH. ENG.

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“…There are several factors affecting the formation of cracks, for example material defects [1] and mechanical discontinuities [2][3][4][5][6][7][8][9][10][11][12]. There are tremendous numbers of work focused on such cracks [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Mode I stress intensity factors of sickle-shaped surface cracks in round solid bars under bending moment

Ismail¹

2016

Int. J. Automot. Mech. Eng.

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Sickle-shaped crack may occur on the surface of solid round cylinder under some specific reasons such as design discontinuities or material defects. This type of crack is capable to grow circumferentially around the bar and it is called a sickle-shaped surface cracks. The complete solution of stress intensity factors (SIF) of sickle-shaped surface cracks is hard to find and therefore the objective of this paper is to present the behaviour of these cracks under remotely applied bending moment. In order to understand the role of these cracks, there are seven crack aspect ratios, a/b considered, ranging from 0.0 to 1.2. For each crack aspect ratio, there are six relative crack depths, a/D used ranging from 0.1 to 0.6. ANSYS finite element program is used to model the crack. Stress intensity factor (SIF) which is based on the J-integral is used to characterize the cracks. For relatively shallow cracks (a/D  0.3), the role of SIFs along the crack front is insignificant regardless of a/b. However, for the deeper cracks (a/D > 0.3), the effect of a/b is tremendous on the SIFs. If a/b is increased from 0.0 to 1.2, higher SIFs are obtained around the central compared with the outer regions of the crack fronts. This is due to the fact that the circumferential cracks at both sides of the bar experience lack of mode I opening mechanism compared with the crack faces at the upper side cracks. It is suggested that the phenomena of crack closure are not only caused by the plastic deformation, surface roughness and other related factors but the shape of crack also plays an important role.

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“…Since then, a lot of research has been carried out in order to assess and analyze the effects of time-dependent loadings on the fatigue life of mechanical components [3][4][5]. Estimation of fatigue life in real-life components and structures is a more complex process as it involves a large number of variables or parameters so as to avoid early failures [6][7][8][9]. The consistency of any technique used for fatigue life estimation depends on many factors, such as stress concentration, degree of multiaxiality in the stress field, and the ability to model the damage caused by non-zero superimposed static stresses [10,11].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Approach for Fatigue Life Estimation Based on Continuum Mechanics Theory and Genetic Algorithm

Kamal¹,

Rahman²

2015

Int. J. Automot. Mech. Eng.

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This paper presents the performance analysis of a newly proposed fatigue estimation model. Research for fatigue estimation methods is focused on developing the capability to handle complex multiaxial loading conditions. This study focuses on an attempt to develop a new fatigue life estimation model using the concepts of continuum mechanics with a critical plane based approach. A genetic algorithm is utilized to estimate the coefficients of stress and strain components. Experimental data for fatigue lives for EN3B steel alloy for in-phase and out-of-phase loading conditions are used to calibrate and analyze the accuracy of the proposed model. Finite element analysis is used to determine an experimental fatigue life of EN3B steel alloy published in literature for validation. The proposed model is easy to implement and does not require the determination of new material constants and material properties. Fatigue life prediction from the proposed model shows good agreement with published results for in-phase and out-of-phase multiaxial loading.

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Fatigue Life Prediction of Commercially Pure Titanium after Nitrogen Ion Implantation

Cited by 15 publications

References 25 publications

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

Mode I stress intensity factors of sickle-shaped surface cracks in round solid bars under bending moment

An Integrated Approach for Fatigue Life Estimation Based on Continuum Mechanics Theory and Genetic Algorithm

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