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ISSN : 09714588 VOLUME 12 
NUMBER 2 
CODEN : IEMSEW APRIL 2005 
CONTENTS
Engineering 

Burr size minimization in drilling using Taguchi technique 
91 


[IPC Code: Int. Cl.^{7} B23B 51/00] 



Optimizing cutting force for turned parts by Taguchi’s parameter design approach 
97 


[IPC Code: Int. Cl.^{7} B23G 1/00] 



Planar parallel manipulators: Structure based selection from the view point of workspace 
104 


[IPC Code: Int. Cl.^{7} B25J] 



A robust approach for evaluating modulus of elasticity of pavement concrete 
111 


[IPC Code: Int. Cl.^{7} E01C 3/02] 



A study of applying nested hyperrectangle learning model to concrete strength estimation 
117 


[IPC Code: Int. Cl.^{7} C04B 14/00] 



Solar photocatalytic oxidation and removal of arsenic from ground water 
122 


[IPC Code: Int. Cl.^{7} C02F] 



Free asymmetric transverse vibration of polar orthotropic annular sector plate with linearly varying thickness in the radial direction 
129 


[IPC Code: Int. Cl.^{7} B06B] 



Materials Science 

Formability of HSLA and EDDQ steels of tube products of India 
141 


[IPC Code: Int. Cl.^{7} C22C 38/00] 



Preparation of ferrites from the combustion of metal nitrateoxalyl dihydrazide solutions 
151 


[IPC Code: Int. Cl.^{7} C22B] 



Variable temperature oblique incidence reflection microscopy (VTOIRM) studies on (110) face of palmitic acid crystals 
155 


[IPC Code: Int. Cl.^{7} C30B] 



Correlations for predicting detonation temperature of pure and mixed CNO and CHNO explosives 
158 


[IPC Code: Int. Cl.^{7} C06B 25/00] 

IPC: International Patent Classification 

Int. Cl.^{7}: International Classification 7^{th} edition, 1999 
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 9196
V N Gaitonde,^{ }B T Achyutha^{ }& B Siddeswarappa
Burr formation in drilling is one of the serious problems in precision engineering and mass production. The exit burr degrades the precision of products and causes additional cost of deburring. Since deburring processes are not yet well automated, the productivity of advanced manufacturing systems is often reduced. However, these processes are labour intensive and add to the total cost of components. Therefore, understanding the drilling burr formation and its dominant parameters is essential for controlling the burr size. This paper describes the Taguchi method based robust design philosophy for minimization of burr size in drilling. Four parameters, namely, cutting speed, feed rate, point angle and clearance angle were identified and the ranges of the parameters for the present investigation was determined from preliminary experiments. Each parameter was investigated at three levels to study the nonlinearity effect of the parameters. Taguchi method based L_{9 }orthogonal array was selected and experiments were conducted as per experimental layout plan. Based on signal to noise ratio analysis, the optimal settings of the process parameters have been determined. Confirmation tests have also been performed to predict and verify the adequacy of the additive models for determining the optimal burr size.
IPC CODE: B23B 51/00
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 97103
Hari Singh & Pradeep Kumar
The objective of the paper is to obtain an optimal setting of turning process parameters (cutting speed, feed and depth of cut) resulting in an optimal value of cutting force while machining En24 alloy steel (0.4%C) with TiC coated carbide inserts. The effects of the selected process parameters have been accomplished using Taguchi’s parameter design approach. The results indicate that the selected process parameterscutting speed, feed and depth of cut, as well as the interaction between cutting speed and depth of cut significantly affect the mean and variance of cutting force of En24 steel turned parts.
IPC Code: B23G 1/00
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 104110
A Srinath & A C Rao
It is known that serial manipulators generate greater workspace. Recent trend is to use planar parallel manipulators where heavy loads are to be handled. There are a large number of planar parallel structures available with the same number of links and degree of freedom (d.o.f.). However, there is no quantitative measure to estimate the parallelism present in a chain. Mathematical measures are proposed to estimate parallelism that exists in a chain, since it influences the rigidity and workspace. Also, formulae are suggested to get insight of the workspace generated, i.e., well conditioned or not.
IPC Code: B25J
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 111116
Sinan Hınıslıoğlu & Osman Ünsal Bayrak
This paper presents the results of an experimental investigation carried out to optimize the modulus of elasticity of pavement concrete by Taguchi method. The experiments have been designed using orthogonal array technique in L_{16} array with four factors and four levels each. Factor levels are 0.30, 0.35, 0.40 and 0.45 water/binder ratio, four different types of gradation with maximum aggregate size of 32 mm, 0, 5, 10 and 15% fly ash and 0, 10, 20 and 30% silica fume replacement by weight of cement. The response data have been analyzed using analysis of variance (ANOVA) technique. According to ANOVA table, water/binder ratio and fly ash content play significant role on modulus of elasticity of concrete pavement. Moreover, the optimum conditions are found to be 0.30 water/binder ratio, gradation Type IV (70% coarse aggregate, 30% fine aggregate), 5% FA content and 20% SF contents. Maximum modulus of elasticity of 33 GPa has been achieved at the optimum conditions. In addition, it is shown that Taguchi method can be used in a pavement concrete mix design as an alternative to the conventional design method.
IPC Code:E01C 3/02
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 117121
Li Chen
The aim of this paper is to demonstrate an exemplarbased nested hyperrectangle learning model (NHLM) and apply it to estimate the strength of high performance concrete (HPC). The proposed model is based on the concept of seeding training data in the Euclidean ispace (where i denotes the number of features) as hyperrectangles. The welldesigned structures and oneshot learning procedures of NHLM could adjust learning abilities efficiently when new examples are added. HPC is a highly complex material, which makes modelling its behaviour a very difficult task. Compared with a standard backpropagation neural network (BPN), the experimental results indicate that NHLM provides a powerful tool for estimating the strength of HPC.
IPC Code: C04B14/00
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 122128
Ayan Majumder^{ }& Malay Chaudhuri
In a laboratory study, the effectiveness of combined tartrate and citrate as photocatalyst in solar photocatalytic oxidation and removal of arsenic from ground water was studied and a method, using a naturally occurring tartratecitrate photocatalyst that can be used at the household level to treat small quantities of drinking water was developed. Kinetic tests performed with 250 mg/L As(III)spiked ground water in presence of 5 mg/L Fe(II) and 50 mM photocatalyst, showed equal efficiency of tartrate and citrate in combination for oxidation and removal of arsenic from ground water in 6 h solar illumination. Presence of silicate moderately decreased the removal of arsenic, while phosphate had more drastic effect on arsenic removal. With the increase in initial As(III) concentration above 250 mg/L, 5 mg/L Fe(II) did not achieved the removal to below 50 mg/L, although the maximum removal efficiency was 80%. Extract of tamarind (fruit of the tree Tamarindus indica), a natural source of tartratecitrate (equivalent to 50 mM tartrate and citrate) achieved the arsenic oxidation and removal from 250260 mg/L arsenicbearing water to below 50 mg/L. The method performed within a 1L closed PET bottle showed similar removal and can be applied at the household level to treat small quantities of drinking water.
IPC Code: C02F
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 129140
R P Singh & S K Jain
In the present paper, free asymmetric transverse vibration of a nonuniform polar orthotropic annular sector plate with a linearly varying thickness in the radial direction have been studied on the basis of classical plate theory when the circular edges of the plate are elastically restrained against translation and rotation while straight (radial) edges are simplysupported. The fourth order linear differential equations with variable coefficients governing the motion have been solved by using collocation technique with Chebyshev collocation points as the interpolating nodes. Frequency parameters of the plate with flexible boundary conditions at the circular edges for some typical values of the taper parameters, the rigidity ratios and the radii ratio have been presented.
IPC Code: B06B
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 141150
R Narayanasamy^{ }& C Sathiya Narayanan
In this work, the formability of HSLA (micro alloyed steel of 1.6 mm thickness) and EDDQ (1.2 mm thickness) steels have been studied and the suitability of HSLA and EDDQ steels for forming applications have been examined. The experimental work on microstructural aspects, tensile properties and formability parameters were carried out for both the steel sheet metals. The forming limit diagram for EDDQ and HSLA steels have been experimentally evaluated. A detailed analysis of the strain distribution profiles obtained from experiment has been attempted. The fracture surfaces of the formed samples have been observed using scanning electron microscopy with a view to obtain a correlation between fracture behaviour and formability of the sheet metals. The EDDQ steel has been found to possess good drawability and stretchability, whereas the HSLA steel has been found to possess limited drawability and stretchability.
IPC Code: C22C 38/00
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 151154
B S Randhawa, H S Dosanjh & Manpreet Kaur
Spinel ferrites, MFe_{2}O_{4} (M= Co, Ni, Cu, Zn) have been prepared by a redox chemical reaction between aqueous solutions of metal nitrates, ferric nitrate and oxalyl dihydrazide (ODH). On rapid heating the reaction mixture undergoes an abrupt exothermic redox chemical reaction that facilitates atomic scale mixing of the cations. This leads to the formation of stoichiometrically pure and singlephase nanoparticle ferrites at comparatively reduced temperature (400^{o}C) and in less time than possible by the conventional ceramic method. The final thermolysis products (ferrites) have been characterized by various physicochemical techniques, i.e., XRD, IR, SEM and magnetic studies (saturation magnetization and Curie temperature).
IPC Code: C22B
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 155157
P B Shashikanth, K Rajgopal, Beniyam Beyene & P B V Prasad
Modifications noticed in the (110) face of palmitic acid crystals, due to slow heating, detected by VTOIRM, is interpreted in terms of two phase transitions, WBB (weak bond breaking) and SBB (strong bond breaking) promoted by anisotropy in interaction energies.
IPC Code: C30B
Indian Journal of Engineering & Materials Sciences
Vol. 12, April 2005, pp. 158164
M H Keshavarz
In this paper, detonation temperature of CNO and CHNO explosives is evaluated by the base of atomic composition and heat of formation. It is shown here how only atomic composition and condensed phase heat of formation of CNO and CHNO explosives are sufficient for reliable prediction of detonation temperature as compared to complicated computer codes. New correlations are introduced so that they can easily be applied for determining detonation temperature via specified different pathways of decomposition of explosives. Calculated detonation temperatures by this procedure for both pure and explosive formulations show good agreement with respect to measured and the BKWSEOS predictions of detonation temperatures.
IPC Code: C06B 25/00