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Dive into the research topics where Sumaiya Islam is active.

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Featured researches published by Sumaiya Islam.


Journal of The Brazilian Society of Mechanical Sciences and Engineering | 2006

Wear behavior of uncoated carbide inserts under dry, wet and cryogenic cooling conditions in turning C-60 steel

Nikhil Ranjan Dhar; Sumaiya Islam; Md. Kamruzzaman; S. Paul

Environmental pollution, inconveniences and health hazards due to conventional application of cutting fluids essentially required for cooling and lubrication have been a great concern of the industries and the modern societies. Further they are also ineffective in controlling the high cutting temperature and rapid tool wear. One of the possible and potential techniques to overcome such problem is application of cryogenic cooling particularly by liquid nitrogen specially where the cutting temperature is a major constraint in achieving high productivity and job quality. The present work deals with experimental investigation in the role of cryogenic cooling by liquid nitrogen jets on tool wear, dimensional deviation and surface finish in turning of C-60 steel at industrial speed-feed combination by uncoated carbide inserts (SNMG and SNMM) of different geometric configurations. The results have been compared with dry and wet machining. The results of the present work indicate substantial reduction in tool wear, which enhanced the tool life, dimensional accuracy and surface finish. This may be mainly attributed to reduction in cutting zone temperature and favourable change in the chip-tool interaction. Further it was evident that machining with soluble oil cooling failed to provide any significant improvement in tool life, rather surface finish deteriorated. Furthermore, it provides environment friendliness and improves the machinability characteristics.


International Journal of Surface Science and Engineering | 2011

Investigation of deformation behaviour and abrasive wear mechanism in nanomachining

Sumaiya Islam; Raafat Ibrahim

The aim of this study is to investigate the deformation behaviour and the abrasive wear mechanism of copper and nickel materials in nanomachining. A nanoindenter equipped with a nanoscratching attachment was used for nanomachining and in situ observation of the machined surfaces. The results showed that the generated normal and cutting forces were higher for Ni than for Cu machining. However, the elastic recovery (%) was lower for Cu than for Ni. Hence, both elastic and plastic deformations were significant in these machining conditions. The pile-up volume due to plastic deformation distinguished between the ploughing and cutting mechanisms. The ploughing mechanism was dominant for Cu machining, while the cutting mechanism was dominant for Ni machining. When the depth of cut was smaller than the cutting tool tip radius, only the ploughing mechanism contributed, otherwise, both mechanisms contributed to produce a nanoscale groove.


Key Engineering Materials | 2011

Study of Abrasive Wear Mechanism through Nano Machining

Sumaiya Islam; Raafat Ibrahim; Raj Das

The objective of this paper is to understand the abrasive wear mechanism for producing a nano scale groove on a bulk material through nano machining. A nano indenter equipped with a nano scratching attachment was used for nano machining operation and in situ observation of the machined surfaces. Two different tools (Berkovich and Conical) with the same tip radius (100nm) but different edge geometries were used to machine both Copper and Nickel coatings. It was found that the percentage of elastic recovery was lower for Cu than Ni during this nano machining operations. Hence, the deformation mechanism in nano machining operation was identified as elasto-plastic in nature as opposed to the well established completely plastic mode of conventional machining operations. The pile up volume due to plastic deformation was utilized to distinguish between the ploughing and cutting modes of abrasive wear mechanisms. The results reveal that the ploughing mechanism was dominant for Cu and the cutting mechanism was dominant for Ni machining. Moreover, both mechanisms ploughing and cutting were the dominant modes of abrasive wear using the Berkovich tip compared to the Conical tip for producing a nano scale groove through nano machining.


international conference on nanoscience and nanotechnology | 2010

On cutting mechanisms during nano machining of metals

Sumaiya Islam; Raafat Ibrahim; Raj Das

The paper investigates the effect of depth of cut on the cutting mechanism for two commonly used coated materials, namely, Copper and Nickel, during nano machining operations. A nano indenter equipped with a nano scratching attachment was used for the nano machining operations and in situ observations of the machined surface. Plastic deformation of the material leads to pile up volume that occurrs along the scratch length. This pile up volume was utilized to distinguish between the ploughing and cutting type of abrasive wear mechanisms of the coated materials. It was found that the relationship between the depth of cut and the cutting tool tip radius governs the cutting mechanism significantly. The ploughing mechanism was responsible for generation of the nano scale groove when the depth of cut was smaller than the cutting tool tip radius. Otherwise both the cutting mechanism and ploughing mechanism were the contributing modes of abrasive wear for producing the nano scale groove.


IOP Conference Series: Materials Science and Engineering | 2017

Finite element simulation of mechanical properties of graphene sheets

Noman Khandoker; Sumaiya Islam; Y S Hiung

Graphene is the material for the twenty first century applications. In this paper, the elastic properties of monolayer and double layer Graphene sheets, typically less than 10nm in size are investigated through linear finite element simulations. The effect of aspect ratio, sizes and chirality of the Graphene sheet on the Youngs modulus, Shear modulus and Poissons ratio are studied. By using structural mechanics approach combining atomistic and equivalent continuum techniques, the Youngs modulus, shear modulus and the Poisson ratio were found and they slightly increase with the aspect ratio but decrease with the size of the Graphene sheet. These simulated properties compliment the mechanical properties of Graphene found in literature.


Materials Science Forum | 2018

A Simple Spot Weld Joint Finite Element Model for Vibration Analysis

Yik Vui Kong; Noman Khandoker; Vincent Chieng-Chen Lee; Sumaiya Islam

Resistance spot welding is one of the commonly used structural joining processes in sheet metal structures. This paper presents the study of vibration characteristics of a spot-welded sheet metal coupon with a simple finite element model. The finite element spot weld nugget was modelled with Spider Configuration (SC) using commercial finite element code ABAQUS. Analytically the spot welded sheet metal coupon was modeled as a free–free Euler Bernoulli beam. Comparison was made for both natural frequencies and mode shapes of the first three bending modes between finite element model and analytical model. It was found that the simple finite element model was able to predict the spot weld joint vibration characteristics with a minimum of 0.35% and a maximum of 7.3% error.


Curtin University of Technology Science and Engineering International Conference (CUTSE 2014) | 2015

Effect of Machining Velocity in Nanoscale Machining Operations

Sumaiya Islam; Raafat Ibrahim; Noman Khondoker

The aim of this study is to investigate the generated forces and deformations of single crystal Cu with (100), (110) and (111) crystallographic orientations at nanoscale machining operation. A nanoindenter equipped with nanoscratching attachment was used for machining operations and in-situ observation of a nano scale groove. As a machining parameter, the machining velocity was varied to measure the normal and cutting forces. At a fixed machining velocity, different levels of normal and cutting forces were generated due to different crystallographic orientations of the specimens. Moreover, after machining operation percentage of elastic recovery was measured and it was found that both the elastic and plastic deformations were responsible for producing a nano scale groove within the range of machining velocities from 250-1000 nm/s.


International Journal of Machine Tools & Manufacture | 2007

An experimental investigation on effect of minimum quantity lubrication in machining AISI 1040 steel

Nikhil Ranjan Dhar; M.T. Ahmed; Sumaiya Islam


gazi university journal of science | 2007

Effect of Minimum Quantity Lubrication (MQL) on Tool Wear, Surface Roughness and Dimensional Deviation in Turning AISI-4340 Steel

Nikhil Ranjan Dhar; Sumaiya Islam; Mohammad Kamruzzaman


Tribology Letters | 2011

Mechanism of Abrasive Wear in Nanomachining

Sumaiya Islam; Raafat Ibrahim

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Noman Khandoker

Commonwealth Scientific and Industrial Research Organisation

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Nikhil Ranjan Dhar

Bangladesh University of Engineering and Technology

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Mohamad Izham

Curtin University Sarawak

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Noman Khondoker

Curtin University Sarawak

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Sujan Debnath

Curtin University Sarawak

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Tengku Azizi

Curtin University Sarawak

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Timothy Fagan

Commonwealth Scientific and Industrial Research Organisation

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