http://nopr.niscpr.res.in/handle/123456789/59736 2026-10-06T05:24:12Z 2026-10-06T05:24:12Z A, Arul Marcel Moshi R, Sundara Bharathi S R, Manikandan K http://nopr.niscpr.res.in/handle/123456789/59750 2022-05-19T07:08:15Z 2022-04-01T00:00:00Z

Title: Effective utilization of optimization algorithms on machining operations Authors: A, Arul Marcel Moshi; R, Sundara Bharathi S; R, Manikandan K Abstract: Optimization is ruling the entire field of machining and material processing technology from the time at which the revolution took place in machining processes. Various types of machining algorithms have been developed so far for optimizing the independent control factors in order to get the improved results of desirable output responses. Each algorithm has its own special features which made them useful in deriving the optimized solutions under different conditions. Suitable algorithm is chosen for the required case depending upon the nature of the problem, the requirement of the order of precision and the availability of optimization tools. In this review article, the general flow of few important algorithms has been explained in a simpler manner to be understood by the recent researchers. Also, required numbers of case studies for each algorithm have been provided extensively. This consolidated work will surely be helpful for the new researchers those who have entered into the domain of optimization. Page(s): 155-168

2022-04-01T00:00:00Z Kumar, Naresh Sengwa, R J Dhatarwal, Priyanka Saraswat, Mukul http://nopr.niscpr.res.in/handle/123456789/59749 2022-05-19T07:03:40Z 2022-04-01T00:00:00Z

Title: Effectively polymer composition controllable optical properties of PVDF/PMMA blend films for advances in flexible device technologies Authors: Kumar, Naresh; Sengwa, R J; Dhatarwal, Priyanka; Saraswat, Mukul Abstract: Polymer blends and their matrices-based nanocomposites have been established as potential candidates in the advancement of optoelectronic and microelectronic device technologies because they bear attractive design flexibility and also tunable optical and dielectric properties. In this research, we prepared the poly(vinylidene fluoride)/poly(methyl methacrylate) (PVDF/PMMA) blend films with varying constituents concentration (viz. PVDF/PMMA=100/0, 80/20, 60/40, 40/60, 20/80, 0/100 wt/wt%), and these were investigated by employing ultraviolet-visible (UV-Vis) spectrophotometer for their in-detail optical characterization. The absorbance, reflectance, and transmittance spectra of these PVDF/PMMA blend films in the wavelength range from 200 nm to 800 nm were analyzed and considered to determine the values of various optical parameters. Due to significant differences in optical behaviour of the PVDF film and that of the PMMA film, the values of the direct energy band gap, extinction coefficient, refractive index, single oscillator energy, dispersive energy, optical range complex dielectric permittivity, optical conductivity, linear susceptibility, third-order non-linear susceptibility, and non-linear refractive index of the PVDF/PMMA blend films were found appreciably blend composition controllable. The energy bandgap, refractive index, and extinction coefficient of these materials are found in the ranges 5.42 to 4.93 eV, 2.22 to 1.72, and 6.62  104 to 0.64  104, respectively. The experimental results offer a new paradigm for the use of these materials in the design and development of next-generation flexible optoelectronic and allied devices. Page(s): 169-180

2022-04-01T00:00:00Z Kumar, V Singh, S J Saran, V H Harsha, S P http://nopr.niscpr.res.in/handle/123456789/59748 2022-05-19T07:00:19Z 2022-04-01T00:00:00Z

Title: Vibration response of exponentially graded plates on elastic foundation using higher-order shear deformation theory Authors: Kumar, V; Singh, S J; Saran, V H; Harsha, S P Abstract: A non-polynomial hyperbolic based theory has been presented for the free vibration response of a rectangular plate with linearly varying thickness, which rests on an elastic foundation. Ceramic/ metal has considered as Functionally Graded Material (FGM) of the plate using exponential law for material gradation of properties in the thickness direction. The influence of Winkler’s and Pasternak's paremeter of foundation on the plate is investigated in conjunction with taper ratio.The governing equation of plates has established using the variational principle. Galerkin's technique has been followed for the solution of the eigen value problem of the presented model. The obtained results have compared with the observations of the isotropic tapered plate, and FGM plate for uniform thickness. The numerical result depicts the good accuracy of the present theory comparable to the existing shear deformation theory. The influences of thickness variation for a plate, has assumed to be simply supported and clamped, have investigated with various span ratio, aspect ratio, taper ratio and foundation stiffness. Page(s): 181-188

2022-04-01T00:00:00Z Agrahari, Ravinder Kumar Jha, Ishan Pathak, K K http://nopr.niscpr.res.in/handle/123456789/59747 2022-05-19T06:53:59Z 2022-04-01T00:00:00Z

Title: Seismic acceleration amplification factor for pin supported moment resisting RC frame structures for Chi-Chi earthquake Authors: Agrahari, Ravinder Kumar; Jha, Ishan; Pathak, K K Abstract: The Seismic forces, acting on the non-structural component, are different with respect to the lateral force observed by the different design codes. For remarking the behavior of the structural components during dynamic action, large numbers of research were done as compared to the secondary or non-structural components of the structures. The behavior of inertia force acting on the non-structural components changes along with the altitude of the structure. The inertia force existing on nonstructural components depends on the acceleration amplification factor. In this paper, five different RC moment-resisting frame models as 2,4,6,8 and 10 stories, with pin support conditions are considered. The linear time history method is used for the analysis of all RC frame models with different range (0.01g to 0.32g) of ground motion data. Determine the acceleration amplification factor for all these models and compared with the previously models. It is observed that no previous model performed satisfactory results. Therefore, to proposed the amplification model which not only depends on the height of the building, natural period of the building but also depends on the range of the Peak Ground Acceleration (PGA).The proposed model is compared with the previous renowned models, It is detected that the proposed model performs better results with respect to other models. Page(s): 189-200

2022-04-01T00:00:00Z