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Articles by K.K. Singh
Total Records ( 4 ) for K.K. Singh
  Kushagra Gupta , Brijesh P. Singh and K.K. Singh
  Human fertility has a central importance in demographic analysis as the births are vital component of population growth. The study of fertility provides important information about women’s reproductive behaviour and attitude. Factors which influence fertility are very crucial and provide the idea about the population change. Keeping in view, many studies have been carried out to study the factors which influence fertility. In this regards, Bongaarts (1978) have proposed a model considering four major factors such as marriage, contraception, induced abortion and lactational infecundability to explain overall variation in the total fertility. In the present study one more factor sterility is incorporated which plays an important role to explain total fertility. Estimation of induced abortions has its own complicacy. The major problem in estimation of abortion is the availability of reliable data for the developing country like India. Its study becomes even more complicated due to the variability of cultural and behavioral attitude of the females. Here a simple and modified model has been used to estimate the abortion index and which is further utilized to estimate the number of birth averted due to abortion for the different major states of India.
  Kuldeep Ojha , R.K. Garg and K.K. Singh
  In this study, a Material Removal Rate (MRR), Tool Wear Rate (TWR) and Surface Roughness (SR) study on the Powder Mixed Electrical Discharge Machining (PMEDM) of EN-19 (AISI-4140) steel has been carried out. Response Surface Methodology (RSM) has been used to plan and analyze the experiments. Peak current, pulse on time, diameter of electrode and concentration of micro-nickel powder added into dielectric fluid of EDM were chosen as process parameters to study the PMEDM performance in terms of MRR, TWR and SR. Experiments have been performed on newly designed experimental setup developed in laboratory. Most important parameters affecting selected performance measures have been identified and optimum process conditions have been found. Also recommended optimal conditions have been verified by conducting confirmation experiments.
  K.K. Singh , P.K. Sarkar , J. Farhan and P. Deepak
  Composite material shows energetically convenient manufacturing with low weight feature. The strength and other mechanical properties of PMC depend upon the orientation of fibers and method, they are fabricated. The product and their industrial applications also taken into consideration while manufacturing whether it is shaft of racing car or it is wings of flying aircraft or etc. The main microscopic objective of production are to ensure that the fibers are well wetted, uniformly distributed and correct aligned. Practical consideration, relating to capital cost, speed of production and component size and shape are often of eminent importance. Therefore, many researchers explored the every possible technique to enhance the performance of product and optimize the process. This study reviews the research work carried out in this field.
  P.S. Shinde , V.K. Tripathi , Prashant Kumar , P.K. Sarkar and K.K. Singh
  The present study is an attempt to take an overview of the work done in the area of bonded repair of plates with composite patches. It was found that since, last decade repair through composite patches is proven to be a very promising technique over other repair methods. This technique improves the fatigue behavior and reduces repair downtime with effective crack retardation. Most of the researchers have done both experimental as well as finite element analysis of bonded repair with composite patches. They had targeted thick plates with plain strain condition and found out stress intensity factor as a measure of fracture toughness. But looking to the large area of applications of thin sheets, it was found that there is a need to analyses bonded repair of thin sheets with composite patches. Care should to taken to minimize the out of plane loading for thin sheets.
 
 
 
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