17 research outputs found
Preparation and Quality Assessment of Low Fat Extruded Snacks from Small Millets
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Structural Response Optimization of a Light-Weight Composite Blast Containment Vessel
No full textThis paper proposes an optimization technique for increasing the structural integrity of a light-weight composite blast containment vessel. The vessel is cylindrical with two hemispherical ends. It has a steel liner that is internally reinforced with throttles and gusset plates and wrapped with a basalt-plastic composite. A computationally-efficient finite element model of the blast containment vessel was proposed and verified in an earlier work. The parameters of the vessel are incorporated within an iterative optimization procedure to decrease the peak strains within the vessel, which are caused by internal blast loading due to an explosive charge placed at the center of the vessel. The results of the proposed procedure are validated for different initial guesses of the design variables
Finite Element Modeling of a Light-Weight Composite Blast Containment Vessel
No full textThis paper presents various approaches for finite element modeling of a cylindrical lightweight composite vessel for blast containment purposes. The vessel has a steel liner that is internally reinforced with throttle and gusset steel plates and wrapped with a basalt fiber/epoxy composite. The vessel design is fairly complex, including many geometric details and several components with different material models. The objective of this work is to determine an accurate and efficient procedure for modeling this type of vessels. This model can be used within an iterative optimization process. Different modeling approaches using various combinations of element types, material models, and geometric details are explored. Results of these models are compared to available experimental data. Accuracy and computational time between all these models are also compared. A suitable modeling method is recommended based on these findings
Durability Characteristics and Microstructure Analysis of Zeolite and Graphene Oxide induced Self-Compacting Concrete: An Experimental Study
No full textThis study aims to examine the influence of incorporating zeolite (Z) and graphene oxide (GO) on the efficiency of self-compacting concrete (SCC). Conventional tests are employed to assess the influence of the change on the microstructure, mechanical properties and durability of the alteration. There is a stronger focus on studying the long-lasting nature of waste expulsion. The chosen tests to investigate durability are the Rapid Chloride Penetration Test (RCPT), the rebound hammer test, the acid, alkaline and sulfate resistance test, the Ultrasonic Pulse Velocity (UPV) test, the SEM and XRD examinations of the mineral composition and microstructure. The identified optimum mix Z10G2 (Zeolite 10% and Graphene oxide 0.02%) mixture exhibited superior chemical resistance and mechanical integrity in comparison to conventional concrete (CC). This enhanced both the microscopic arrangement and the physical characteristics of the material. Based on these discoveries, it seems that identified mixes have the capacity to enhance the effectiveness and durability of concrete constructions. The overall findings indicate that inducing identified mix into concrete mixtures has the potential to enhance durability and performance in various environmental conditions. To accurately assess the potential benefits of enhancing the longevity of concrete structures, further investigation is needed to examine the long-term effects on these structures
Finite Element Modeling of a Light-Weight Composite Blast Containment Vessel
No full textThis paper presents various approaches for finite element modeling of a cylindrical lightweight composite vessel for blast containment purposes. The vessel has a steel liner that is internally reinforced with throttle and gusset steel plates and wrapped with a basalt fiber/epoxy composite. The vessel design is fairly complex, including many geometric details and several components with different material models. The objective of this work is to determine an accurate and efficient procedure for modeling this type of vessels. This model can be used within an iterative optimization process. Different modeling approaches using various combinations of element types, material models, and geometric details are explored. Results of these models are compared to available experimental data. Accuracy and computational time between all these models are also compared. A suitable modeling method is recommended based on these findings
Structural Response Optimization of a Light-Weight Composite Blast Containment Vessel
No full textThis paper proposes an optimization technique for increasing the structural integrity of a light-weight composite blast containment vessel. The vessel is cylindrical with two hemispherical ends. It has a steel liner that is internally reinforced with throttles and gusset plates and wrapped with a basalt-plastic composite. A computationally-efficient finite element model of the blast containment vessel was proposed and verified in an earlier work. The parameters of the vessel are incorporated within an iterative optimization procedure to decrease the peak strains within the vessel, which are caused by internal blast loading due to an explosive charge placed at the center of the vessel. The results of the proposed procedure are validated for different initial guesses of the design variables
An Experimental Study on Workability and Strength Characteristics of M40 Grade Concrete by Partial Replacement of Cement with Nano-TiO2
No full textHow and why of orthodontic bond failures: An in vivo study
No full textIntroduction: The bonding of orthodontic brackets and their failure rates by both direct and in-direct procedures are well-documented in orthodontic literature. Over the years different adhesive materials and various indirect bonding transfer procedures have been compared and evaluated for bond failure rates. The aim of our study is to highlight the use of a simple, inexpensive and ease of manipulation of a single thermo-plastic transfer tray and the use the of a single light cure adhesive to evaluate the bond failure rates in clinical situations. Materials and Methods: A total of 30 patients were randomly divided into two groups (Group A and Group B). A split-mouth study design was used, for, both the groups so that they were distributed equally with-out bias. After initial prophylaxis, both the procedures were done as per manufactures instructions. All patients were initially motivated and reviewed for bond failures rates for 6 months. Results: Bond failure rates were assessed for over-all direct and indirect procedures, anterior and posterior arches, and for individual tooth. Z-test was used for statistically analyzing, the normal distribution of the sample in a spilt mouth study. The results of the two groups were compared and P value was calculated using Z-proportion test to assess the significance of the bond failure. Conclusion: Over-all bond failure was more for direct bonding. Anterior bracket failure was more in-direct bonding than indirect procedure, which showed more posterior bracket failures. In individual tooth bond failure, mandibular incisor, and premolar brackets showed more failure, followed by maxillary premolars and canines
