Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"Strength of materials"”.
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Notched strength analysis of tensile specimens taken from a thick, filament-wound graphite/epoxy pressure vessel
An experimental analysis of specimens taken from a thick, filament-wound composite material pressure vessel (cylinder) was performed by testing tensile coupons with various semi-elliptical surface notches. The strength of specimens with small notches was found to be notch insensitive. The strength …
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Bending of a bonded beam as a test method for adhesive properties
A strength of materials type solution is obtained for the shear stress state in the adhesive layer of a bonded cantilever beam subjected to an end load. The shear stress is constant through the thickness of the adhesive layer and varies from zero at the fixed end to a maximum value at the free end. …
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Quantitative and consistent tests for interlayer adhesion in laminated glass
The use of the double cleavage drilled compression (DCDC) for determining the toughness of glass/PVB interfaces has been examined. Experiments were conducted on two different types of samples: low and high adhesion. Stress and fracture analysis was conducted using the finite element method. The …
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Optimization of composite carriage for a coordinate measurement machine
The growing need for high quality and reliability of products requires the control of the accuracy of dimensions and shape of product components. Coordinate Measurement Machines (CMM) are now able to measure the dimensions and/or the shape of objects with submicron precision. The desire for …
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A beam test for adhesives
The strength of materials solution for a new bonded cantilever beam test specimen to determine adhesive shear properties is reviewed and discussed. A parametric analysis for the adhesive shear stress and for the end deflection reveals the specimen dimensions required for reliable bonded adhesive …
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Mechanical modeling of vestibular hair cell bundles
… are transducers found found in the inner ear of vertebrates. They convert a mechanical signal, detected by the deflection of a bundle of cilia extending from their top surface, into an electrochemical signal. This dissertation studies the mechanical influence of the structure and materials on …
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Scratch tests : a new way of evaluating the fracture toughness of materials
… a fracture mechanics model for the assessment of the fracture toughness of materials from scratch tests. Dimensional Analysis highlights two major processes at work during scratch tests: plastic yielding and fracture dissipation. An original set-up of controlled laboratory tests on paraffin wax …
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Material and Damping Characterization of Discretized Adhesive Tapes in Cantilever Beams undergoing Free and Forced Vibration
… is focused in investigating the effectiveness of discretized damping tapes applied to a cantilever beam subjected to free and forced vibrations. The work is divided into three main sections. First, we performed material characterization of the viscoelastic (VE) pressure sensitive adhesive layer …
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Some studies in simultaneous failure in equipment items
This study can be classified under the subject of equipment item replacement analysis. Simultaneous failure, SF, of the components of an equipment item, EI, is the topic of this thesis. Examination of the possibility of designing components of an EI for SF is one objective of the study. The motive …
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Performance simulation of a composite orthopedic implant device
The static strength and long-term performance of composite hip prostheses under complex mechanical and environmental loading conditions are studied through theoretical modelling and experimental investigations. Two static strength models, namely, a cantilever beam model and an elastic foundation …
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Development of a Remote Laboratory with the Integration of Cloud Applications
Distance learning has been a mode of education since its inception at Pennsylvania State University in 1892. What started as a simple correspondence course has blossomed into a globally accepted method of education. The need for remote laboratories is growing as more lab-intensive programs of study …
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Structure-Property Relationships of 3D Printed Thermoplastics for Implantable Orthopedic Devices
… This work explores the structure and properties of 3D printed thermoplastics with relevant medical applications through fused filament fabrication (FFF) processing. Four FFF materials (PLA, PEEK, PEKK, and PPSU) are investigated with an emphasis on characterizing printed weld formation and the …
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Role of delamination and interlaminar fatigue in the failure of laminates with ply dropoffs
… were conducted on laminates with ply dropoffs to better understand the interlaminar stress field and delamination/damage characteristics in such laminates, as well as the relationship between the two based on the strength of materials approach. To gain key insights into the mechanisms and …
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Characterization of high cycle fatigue and laser-aided machining and polishing of additively manufactured materials
… and laser-aided machining and polishing (LAMP) of materials are emerging manufacturing processes both for research and industrial sectors. The AM process can manufacture near-net-shape parts with complex geometries. Meanwhile, the LAMP process integrated with an AM system offers a high …
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The stability of coastal cliffs along a section of the Ceredigion coastline
Investigation of cliff recession along 20km of the West Wales coastline has recognised erosion processes and mechanisms. Cartographic evidence has established considerable spatial variability in long-term retreat rates between the solid rock sections and those of tills and glacial clays. Mean …
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High strain rate properties of materials using Hopkinson bar techniques
… the high strain rate mechanical properties of polymers, polymer bonded explosives and solders. In addition, it examines experimental developments that will allow more detailed investigation of these properties in the future. The split Hopkinson pressure bar is a standard apparatus used to …
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Serviceability-based design of tall buildings subjected to vortex shedding
With the increasing rate of population, there is an increase in demand for housing for people and their families. Due to the limited amount of land space, one of the most viable and feasible solutions is increase the number and height of residential and office buildings leading to a requirement of …
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