NUST Institutions Library Catalogue Search for 'an:"119879"'

Hygroscopic Expansion in Epoxy Based Stereo Lithography Materials at Different Humidity Levels and Aging

By Bilal Ahmed. Islamabad SMME NUST 2016 . 105p. 30cm..

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Honeycomb structures designing manufacturing and testing using aluminium as material for airframe application

By Muhammad Salman Khan. Islamabad SMME NUST 2015 . 66 P.

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Development of Rapid Tooling for Investment Casting of Turbine Blade and Its Quality Inspection /

By Mr. Aamr ir Iftikha. Islamabad : SMME - NUST, 2012 . ill, 106 p. ; , Hardcover.

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Design and Manufacuring of a Powder Feeder for Laser Cladding Process

By Ali Akhtar. Islamabad: SMME - NUST 2016 . xv, 90p. : ill. ; , Hardcover. 30cm.

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Experimental Investigation of Optimized Parameters for Open Hole Compression Strength of Carbon Epoxy Composite & Determination of Localized Strains Using Digital Image Correlation Technique/

By Muhammad Tayyab.. Islamabad : SMME NUST, 2014 . X, 73 P. : ILL. ; , Hard Cover. 30 cm..

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Development of an Operational Framework for Cellular Manufacturing System Using Hybrid Genetic algorithm /

By Zeb, Alam. Rawalpindi: CEME - NUST, 2017 . 225 p. : ill. ; 30cm..

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Laser Welding of Dissimilar Materials (Stainless Steel 316L To Titanium TI-6AL-4V) /

By Khan, Usama. Islamabad: SMME - NUST, 2015 . 68 p.: ill.; 30cm..

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Digital Manufacturing of Patterns for Casting through Rapid Prototyping (RP) Technologies /

. 87p. ; , Sand Casting is very old technique for casting metal parts. In this process a pattern is made which is a replica of the desired part. The pattern is placed in a box and curing sand is poured around it. After curing of sand, pattern is detached so that replica is imprinted in the sand. Then metal in molten form is added into the hollow portion and desired part is obtained after cooling. The process is cheap and incorporates all kinds of metals, however, the correctness of the final part is primarily dependent on the correctness of the pattern itself. Rapid Prototyping (RP) is a collection of contemporary manufacturing methods which create the part straight from Computer Aided Design (CAD) model using layer-by-layer deposition technique. The CAD model is first sliced and each cross section of the CAD model is used as a guide to deposit material at the desired location. The RP process varies with the technology being used. Additive Manufacturing (AM) has been of significance importance because of its precision and overall time reduction in product development process. Moreover, a prototype can be developed to know the functioning of the actual part which gives flexibility to designers to vary the design to eliminate the inaccuracies. A case study was undertaken in this research work in collaboration with KSB Pumps Hassan Abdal, Pakistan. KSB pumps are a well renowned manufacturers of pumps for variety of applications. The company was facing problem in one of their pumps named ‘Sewatec 250-401’ whose performance (efficiency) was not up to the desired standards. The impeller of the pump was being manufactured through manual pattern making and sand casting techniques. After detailed study of the manufacturing process of the said pump, it was observed that the vane of said impeller was manufactured in a crude way leading to doubts in its accuracy. Therefore, it was decided that the vane of this pump will be manufactured replacing existing manual pattern making with RP patterns and performance of the new and old pumps will be compared. The pump manufactured using RP technique showed higher efficiency (83.6% efficiency) as compared to the one manufactured using manual patterns (74% efficiency) and met all performance standards (82% efficiency). The manufacturing through RP reduced the overall cost of the manufacturing by 1/8th and considerably reduced the time to manufacture (by 11 weeks). 30cm..

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Analysis of Mechanical Properties of parts produced through Stereolithography (SLA) with different Build Parameters/

By Kaleem, Usama. 30cm. .

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Design and Development Of 3D Sand Mold Printer For Rapid Casting /

By ASGHAR, ARSLAN . . 62p. ; 30cm..

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Material Characterization of Laser Remelted Aluminium Alloy for Improvement in Fatigue Life /

By Nooman, Umer Bin . . 101p. ; 30cm..

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Material Characterization of Laser Remelted Aluminium Alloy for Improvement in Fatigue Life /

By Nooman, Umer Bin . . 101p. ; 30cm..

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Design and Fabrication of 3-DOF Dynamometer for Measuring Cutting Forces during Milling of Al Based Aerospace Alloy /

By Sharif, Aman . . 42p. ; 30cm..

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WAY FORWARD FOR IMPROVEMENT AND RELIABILITY FOR PN DOCKYARD FOUNDRY TECHNOLOGY /

By NIAZI, QAISAR AMIR KHAN. . 60p. ; 30cm..

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GRAIN REFINEMENT OF ALUMINIUM USING SLOPE PLATE IN SEMI SOLID METALLURGY /

By Yar , Asfand . . 126p. ; 30cm..

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LASER CLADDING OF FUNCTIONALLY GRADED MATERIALS: DESIGN AND MANUFACTURING OF MULTI-POWDER FEEDER FOR MANUFACTURING FUNCTIONALLY GRADED MATERIALS THROUGH LASER CLADDING PROCESS /

By KALEEM , MUHAMMAD ALI. . 55p. ; 30cm..

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INVESTIGATION OF MECHANICAL PROPERTIES IN DYNAMIC SOLIDIFICATION USING CONFORMED COOLING TECHNIQUE /

By Ans ,Muhammad. . 66p. ; 30cm..

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Effects of Dynamic Solidification on Properties of Die-Casted Alloys /

By Nawaz ,Haq . . 64p. ; 30cm..

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The Prevention of Crack Propagation in Metal Alloy by Laser Remelting /

By BILAL ,USAMA. . 86p. ; 30cm..

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DESIGN OF CLADDING NOZZLE FOR MULTI-POWDER FEEDER /

By UMAIR ,MUHAMMAD. . 52p. ; 30cm..

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Analysis of Failure of Hanger Pins in Pakistan Railways Carriages /

By Mustafa, Ahmad Kamal. . 43p. ; 30cm..

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To determine the effect of thermal shock On a fixed glass dome /

By rehman ,Shafique ur . . 49p. ; 30cm..

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Design/Redesigning for Manufacturing of Electrical Console Casing for Improvement in Heat Transfer Efficiency /

By Khalid ,Jahan Zaib Khan . . 68P. ; 30cm..

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Modeling and FE Simulation of tool wear mechanism in single point turning of Titanium alloy i.e. Ti6Al4V under various conditions /

By Mehmood ,Sabeel. . 91p. ; 30cm..

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STUDY OF PARAMETERS OF ELECTRON BEAM WELDING OF INCONEL 617 WITH STAINLESS STEEL 310 /

By Mumtaz ,Adeel. . 58p. ; 30cm..

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Piezoelectric Material Synthesis and Development /

By Zafar ,Noman . . 56p. ; 30cm..

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Development of Test Bench for the Characterization of Shape Memory Alloy Wire /

By Khan ,Haroon Ahmed . . 55p. ; 30cm..

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Development of Test Rig for Position Control of Shape Memory Alloy Springs using PID Algorithm. /

By Bhutta ,Shozib Mahmood. . 49p. ; 30cm..

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Design and Development of Layer by Layer Deposition Mechanism for Selective Laser Melting Process /

By NAWAZ ,HAMZA . . 59p. ; 30cm..

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Modeling and designing of six degrees of Freedom Robot Arm for multiple applications /

By Khird Added Asif ,Muhammad. . 68p. ; 30cm..

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Analysis of Cutting Forces and Tool Wear during Micro milling of Ti-6Al-4V at low machining speed /

. 71p. ; 30cm..

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Design Development & Testing of Strain Gauge Based Cutting Force Dynamometer /

By SIDDIQUE ,YASIR . . 70p. ; 30cm..

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Design and Fabrication of Ultrasonic Transducer for Ultrasonic Assisted Machining/

By Zahid Danyal . . 70,p; 30,cm;.

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NUMERICAL & EXPERIMENTAL INVESTIGATION OF EFFECTS OF PROCESS PARAMETERS ON ELECTROMAGNETIC FORMING OF METALS /

By Khan Zarak. . 182,p; 30,cm..

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Development, Characterization and Testing of Nickel Titanium Based High Temperature Shape Memory Alloys/

By Rahman Saif ur . . 186,p; 30,cm..

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Evaluation of Eddy Current Signatures for Predicting Different Heat Treatment Effects in Chromium- Vanadium (Cr-V) Spring Steel /

By Hashmi, Javeria. , Hardcover 30cm..

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Finite Element Analysis of Knee Implant for Orthopedic Applications

By Zahir, Mian Muhammad Asim. . viii. 40p , Hardcover 30cm..

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A Comparative study and optimization of tig welding and plasma arc welding parameters on Ti-6Al-4V Plates using taguchi method with the grey relational analysis /

By Mumtaz, Waleed. , Hardcover 30cm.

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Development, Characterization and Testing of Nickel Titanium Based High Temperature Shape Memory Alloys /

By Saif ur Rahman,. . 216p. , TiNi-based shape memory alloys are well known for their excellent shape memory and superelastic properties. TiNiPd alloys are considered as the better high temperature shape memory alloys due to high transformation temperatures, small hysteresis, reasonable strain recovery and comparable workability. However, by further increasing the transformation temperatures i.e. by increasing the Pd content, thermal hysteresis also increases. This has an adverse effect on the actuation behavior of the alloy. At high temperature the critical stress for slip deformation of TiNiPd alloys also decreases, which increases the permanent deformation and reduces the strain recovery in the alloy. In order to prevent increase in thermal hysteresis, reduce permanent deformation and increase strain recovery in TiNiPd alloy, Ni has been replaced by 5 at%, 10 at% and 15 at% Cu. Four alloys; Ti50Ni25Pd25, Ti50Ni20Pd25Cu5, Ti50Ni15Pd25Cu10 and Ti50Ni10Pd25Cu15 (all in atomic %) have been developed and characterized for their microstructure, phase transformation temperatures, mechanical and shape memory properties in solution treated condition. By increasing the Cu content, the transformation temperature of the TiNiPdCu alloys significantly increased, whereas thermal hysteresis decreased. Similarly, the microhardness, yield and fracture strength also increased. Shape memory properties like strain recovery and work output also improved. Therefore, TiNiPdCu alloys showed improved transformation temperatures, strain recovery and critical stress for slip deformation through solid solution strengthening mechanism. The TiNiPdCu alloys were also aged at different aging temperatures i.e. 400°C, 500°C, 600°C and 700°C for 3 hours to investigate their transformation temperatures, mechanical and shape memory properties and compared with the solution treated samples. By aging the Ti50Ni25Pd25 and Ti50Ni20Pd25Cu5 alloys, the transformation temperatures, mechanical and shape memory properties slightly increased. After aging the Ti50Ni15Pd25Cu10 and Ti50Ni10Pd25Cu15 alloys, the transformation temperatures and shape memory properties significantly decreased, however the mechanical properties were improved. viii It can be concluded that aging of Ti50Ni25Pd25 and Ti50Ni20Pd25Cu5 alloys is beneficial to increase their transformation temperatures and shape memory properties. However it has an adverse effect in terms of transformation temperatures and strain recovery by aging the Ti50Ni15Pd25Cu10 and Ti50Ni10Pd25Cu15 alloys. 30cm.

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Multi-Gesture Decoding using Hybrid EMG-IMU for Rehabilitation Applications /

By Shahzad, Waseem . . 161p. , Prosthetic rehabilitation of the upper limb through powered prosthetic devices is an active research area for the past several decades. Multi-degree of freedom prosthetic hands controlled by surface electromyography signals (sEMG) of the forearm muscles have been developed to restore the lost limb functionality. A major objective of the current research is the development of intuitive prosthetic controllers for modern dexterous prosthetic hands. Current state of the art prosthetic controllers utilize pattern recognition (PR) of multi-channel sEMG signals for decoding the intended motion class. Despite decades of academic research, a clinically viable PR based prosthetic controller is yet to be realized. The PR based classifiers have resulted in more than 90% classification accuracy when evaluated under controlled laboratory conditions. However, the excellent laboratory performance of these classifiers is yet to result in their clinical acceptability and commercial availability. As a result, the currently available prosthetic devices are still based on non-intuitive binary or sequential digital control. There are several reasons for this academia-industry disparity. The unintended variations of sEMG signal characteristic due to several confounding factors, including arm position, adversely affects the performance of pre-trained PR based prosthetic controllers. Researchers have proposed fusion of auxiliary sensory information for classifier robustness against forearm positional variations. Sensor fusion techniques including accelerometer-mechanomyography (ACC-MMG), force-myography (FMG) and magnetic markers (MMs), have been reported with significant performance improvements. This study focused on the impact of arm position variations on the performance of PR-based forearm motion class decoders. A wearable data acquisition system was designed to acquire multichannel sEMG and measure arm position using inertial measurement units. The performance of support vector machine (SVM) and linear discriminant analysis (LDA) classifiers was evaluated for training at static positions and for dynamic arm movements to characterize the adverse effects of arm position variation. Sensor fusion of sEMG and arm position data was evaluated to mitigate the arm position effect. A comparison of static multi-position training and dynamic arm movement training was carried out to suggest more pragmatic strategies for classifier training. The sensitivity xi of classifiers to motion class taxonomy was also evaluated. Sixteen motion classes categorized in distant-taxonomy and close-taxonomy groups were classified using LDA, Linear SVM (LSVM), Non-Linear SVM (NLSVM) and Multi-layer perception (MLP) classifiers. The results of the study have shown a significant dependence of LDA and LSVM classifiers and an insignificant dependence of the NLSVM and MLP classifiers on motion class taxonomy. The results suggest a more pragmatic selection of motion classes for realistic classifier performance evaluation 30cm.

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Improvement in Magnetic Properties of Samarium-Cobalt (1:5) Alloy through Controlled Material Processing /

By Akhtar, Saleem. . 195p. , Permanent magnets are defined as solid materials that provide sufficiently high magnetic flux and offer resistance to demagnetizing fields. High magnetic flux can be controlled by changing the chemical composition of the permanent magnetic material but the demagnetizing field resistance called coercivity depends upon the shape or crystal anisotropies and the process in which microscopic regions of the material are further subdivided. Permanent magnetic materials include a variety of ceramics, intermetallics and alloys. Samarium-cobalt (SmCo) magnets are rare earth magnets and are known for their high coercivity and Curie temperature. In this class of magnets, SmCo5 has a potential to demonstrate highest coercivity due to its high magneto-crystalline anisotropy. However; only 4% of the theoretical coercivity values are achieved so far. One method of improving the coercivity is through alloying while the other is through process control. The latter technique is used to improve the microstructure of the magnet. In this research the improvement of coercivity of SmCo5 is focused through process control. The microstructure of SmCo5 has been controlled through processing at the stages of manufacturing i.e., casting and ball milling. In the first stage, the microstructure was controlled using conformal cooling channels in the mold i.e., through controlled solidification. The samples from this process were compared with the spin casting technique. It was observed that the formation of Sm2Co7 and Sm5CO19 are responsible for lowering the coercivity of the magnetic material. Therefore, the solidification temperature was controlled to achieve better microstructure. The results show that the casting produced at the lower temperatures had nano-sized peritectic lamellar structure. These nano structures are belived to improve the coercivity of SmCo5 to 32.9 kOe, which is one of the highest reported value. In the second part of this thesis, the focus was on the optimization of the ball milling parameters i.e., the process by which fine powder is produced. Ball-milling affects the shape, size distribution and mean particle size and consequently the final magnetic properties. The Taguchi L9 experimentation was designed to determine the effect of different parameters on the magnetic properties of the final product. It was noted that the ball milling speed, ball to powder ratio and time are the most significant process parameters which affects the coercivity of the final magnet. Best combination of these parameters was time and ball to powder ratio. ix In this work novel mold design was introduced which can provide the casting with fine microstructure. The coercivity values upto 32.9 kOe were achieved with the same mold design. Further, the optimization of ball milling parameters through Taguchi was done for SmCo5. Novel nano-structures were observed in SmCo5 before and after sintering process. 30cm..

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