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Showing 1 to 20 of 87 for “"dimensional stability"”.
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Dimensional Stability of Multilayer Circuit Boards
Numerical and experimental studies are performed to study residual deformation and warpage in a model multilayer circuit board construction of a common composite substrate (7628 fabric style). A numerical procedure based on classical lamination theory with non-isothermal viscoelastic constitutive …
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Dimensional Stability of Geosynthetic Clay Liners in Landfill Applications
<p>An investigation was conducted related to the dimensional stability of geosynthetic clay liners (GCLs) in landfill applications. Multiple occurrences of panel separation of overlap seams in GCLs have been documented; however, explanation for the relative contribution of various mechanisms …
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Investigation of the Dimensional Stability in DSP Cement Paste
In the second half of this work, thermal expansion property was systematically investigated for cement pastes with a wide range of microstructure features. It was found that saturated paste behaves anomalouly in response to temperature change, i.e., the thermal expansion is followed by a …
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Effects of Microwave Irradiation on the Dimensional Stability of Complete Denture Bases
… data on how this practice affects the long term dimensional stability of commonly used complete denture bases in the United States. Purpose: The purpose of this study was to perform an in-vitro investigation, testing and comparing the effects of microwave irradiation on the dimensional stability …
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Flexural Stiffnesses of and Dimensional Stability in Circular Quasi-isotropic Laminate Mirrors
… laminates (pi/n, where n=3, 4, and 6) and dimensional stability in the composite laminates are investigated numerically. The numerical results show that directional dependency of flexural stiffness in the laminates, which is strongly associated with stacking sequences, is a significant …
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Dimensional Stability and Properties of Thermoplastics Reinforced with Particulate and Fiber Fillers
This work has been concerned with the dimensional stability and the structure-property relationships of thermoplastics reinforced with particulate and fiber fillers. The first part of this study was concerned with ascertaining the main causes of warpage observed for injection-molded thermoplastics …
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The effect of dehydration on the dimensional stability of acrylic partial denture bases
Submitted in fulfillment of the requirements for the award of the degree of Master of Health Sciences: Dental Technology, Durban University of Technology, Durban, South Africa, 2018.
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The Effect of Long-Term Thermal Cycling on the Microcracking Behavior and Dimensional Stability of Composite Materials
… cycles, and the effect of microcracking on the dimensional stability of composite materials. Changes in laminate coefficient of thermal expansion (CTE) and laminate stiffness are of primary concern. Included in the study are materials containing four different Thornel fiber types: a PAN-based …
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Three-Dimensional Stability/lateral Shift Analysis of Continuous Welded Rail (Cwr) Track and Innovative Methods to Enhance CWR Track Performance
Innovative methods of enhancing the stability of tamped track and sharp curved track are recommended according to the theoretical findings from this research. Using the innovative methods, railroads can eliminate or reduce slow orders following tamping or track surfacing to improve railroad …
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Evaluation of Accuracy of Impression Materials with Different Mixing Techniques
Purpose: To investigate gypsum compatibility and dimensional stability of irreversible hydrocolloid impression materials with three mixing techniques. A comparison between vacuum-mixed, mechanically-mixed and manually-mixed techniques was evaluated for each impression material. Materials and …
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A comparison of fusible interfacings commonly used with selected polyester/cotton shirting fabrics
… by examination of rigidity, bond strength, and dimensional stability. More specifically, varying fiber content and three types of nonwoven interfacing were used. Preshinking consisted of a warm wash and tumble dry Preshrunk and unshrunk fabrics were fused to each of the three interfacings using …
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Wood cell wall modification with hydrophobic molecules
… modifications of wood have been shown to improve dimensional stability, water repellence and/or durability, thus increasing potential service-life of wood materials. However current treatments are limited because it is difficult to introduce and fix such modifications deep inside the tissue and …
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A two-stage thermal modification of wood
… treatment is an effective method to improve the dimensional stability and biological durability of wood. An undesired side effect is the reduction of mechanical properties of wood, mainly due to the high temperatures involved (150-280°C). In this thesis the effects of heat treatment on wood …
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Response of mat conditions and flakeboard properties to steam- injection variables
… amount of steam input. Flakeboard strength and dimensional stability properties were tested. Steam-injection pressing produced panels with superior dimensional stability as compared to conventional pressing. The high steam press schedule produced internal bond and shear strengths equal to the …
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Design of Improved Polyester Dielectric Insulators for Electronic Packaging
… original melting temperature to improve the dimensional stability is elucidated. Lastly, a description of a new photosensitive copolyester dielectric insulator is presented.
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OnBoard Parameter Identification for a Small UAV
… The goal of this research was to identify the dimensional stability and control derivatives of the WVU Phastball UAV in flight using a frequency domain based real-time parameter identification (PID) approach.;The data necessary for this project was gathered using the WVU Phastball UAV, a …
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Hydroentanglement Process as a Finishing Treatment for the Enhancement of Knitted Fabrics
… have been made, directed at improving the dimensional stability and physical properties of woven and knitted fabrics through the finishing technique of hydroentanglement. In such applications, warp and filling fibers in fabrics are hydroentangled at crossover points to effect enhancement in …
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