Ghulam Ishaq Khan Institute of Engineering Sciences and Technology

About: Ghulam Ishaq Khan Institute of Engineering Sciences and Technology is a education organization based out in Topi, Pakistan. It is known for research contribution in the topics: Quantum efficiency & Diode. The organization has 618 authors who have published 940 publications receiving 10674 citations.

Progress on single-point incremental forming of polymers

Abstract: Single-point incremental forming (SPIF) of polymers was started back in the first decade of twenty-first century; since then, substantial studies have been performed on this topic. The present article reviews these studies and compiles the developments in a comprehensive manner. The review entails a number of forming aspects of polymers, the more important of which are deformation mechanics, failure modes, formability, forming forces, springback, and post-forming material characteristics. The agreements and disagreements amongst the researchers are recognized and critical remarks are provided. The issues are identified, and areas of future work are proposed to further comprehend knowledge on the subject in order to successfully deploy the process on industrial scale. The differences in the characteristics of SPIF of polymers and SPIF of metals are also outlined and discussed in this article. The review concludes that the operating parameters and material are the key factors that affect the process performance. Further, the innovative technology must be adopted, and a larger database should be established to enhance industrial viability of the process.

The effect of bolt tightening methods and sequence on the performance of gasketed bolted flange joint assembly

Abstract: This paper presents results of the effect of different bolt tightening sequences and methods on the performance of gasketed bolted flange joint using nonlinear finite element analysis. Bolt preload scatter due to elastic interactions, flange stress variation and bolt bending due to flange rotation and gasket contact stress variation is difficult to eliminate in torque control method i.e. tightening one bolt at a time. Although stretch control method (tightening more than one bolt at time) eradicates the bolt preload scatter, flange stress variation is relatively high. Flange joint\'s performance is compared to establish relative merits and demerits of both the methods and different bolt tightening sequences.