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.
Results
Showing 1 to 20 of 81 for “"tensile strengths"”.
-
Relative tensile strengths of chainmail weaves
… the rings used, and the weave type. The relative strengths of different types of chainmail were investigated by conducting tensile tests on both physical and simulated samples. Eight different ring diameters, four different ring gauges, four different weaves, and three methods of closure of the …
-
Comparative Tensile Strengths of Preceramic and Postceramic Solder Connectors Using High-Palladium Alloy
Purpose: To evaluate the tensile strength properties of Rx Naturelle Plus and Option (high-palladium) alloys on soldered connectors under simulated preceramic and postceramic soldering conditions. Materials and methods: Eighty cylindrical castings were fabricated (40 using Rx Naturelle Plus alloy …
-
Development of a Hollow-Cylinder Tensile Tester to Obtain Fundamental Mechanical Properties of Asphalt Paving Mixtures
… of variation was measured for the HCT and IDT tensile strength results. In general, the coefficient of variation of the HCT strengths was found to be lower than that of the IDT strengths, particularly for ultimate tensile strengths. The HCT and IDT were found to compare favorably in the …
-
Development of Next-Generation Construction Materials with Graphene Additives
… of these construction materials (e.g. low tensile strength, flexural strength, and brittleness), reduce the amount of cement consumption or replace OPC products for minimizing the environmental impact of construction materials. Among many additives explored to address these problems, …
-
The lateral load carrying capacity of wall ties used in cavity wall construction in the Western Cape : a comparison between the Butterfly-type wire tie and the Crimped-type wire tie
… the Crimped lie as regards to water transfer, tensile and compression strengths based on the Australian Code [AS 2699-l 984] requirements as it is more comprehensive. The reason was because the Butterfly Tie has been promoted in cavity wall construction in South Africa for a number of reasons, …
-
The effect of length on tensile strength parallel-to-grain in structural lumber
… obtained from the tests indicated that the tensile strengths of the 30-inch test specimens were significantly higher than the tensile strengths of the 90- and 120-inch test specimens. A tensile strength-length effect model was developed for generating tensile strength values of lumber taking …
-
Structural performance evaluation of the Postrite post-treatment corrosion inhibitor system
… load/deflection analysis. The direct shear and tensile strengths of the overlays were tested and evaluated. Strain gages were used to aid in an overlay to substrate interaction evaluation. The Postrite post-treatment system was determined to have no detrimental effects on the bridge deck slabs …
-
Mechanical testing of rapid-prototyping refractory ceramic print media
… mechanically tested to ascertain their ultimate tensile strengths and observed to determine their dimensional consistency over the printing and post-printing process. The equipment used to perform tensile testing was designed and built for use with custom-designed tensile test samples. Two …
-
Standardization of test methods for property evaluation of FRP bars
… for #3 to #8 bars, respectively. Average tensile strengths of FRP bars were found to be 256 ksi (ribbed carbon ), 83 to 77 ksi (ribbed glass), 82 to 67 ksi ( sand coated glass), and 173 ksi (sand coated aramid). (Abstract shortened by UMI.).
-
A study of the transformation behaviour and mechanical properties of iron-manganese alloys.
… iron manganese alloys were shown to possess good tensile strengths and ductilities but their impact properties were markedly inferior to equivalent iron nickel alloys. An explanation of this poor impact resistance was sought in terms of both structural peculiarities, i.e. twinned martensite …
-
Effects of high pressure solidification on the tensile properties of polypropylene
… under pressures up to 40,000 psi. In addition to tensile properties, the resultant density, microstructure and DTA structure were examined. From all measurements, it was concluded that the degree of crystallinity decreased with increasing solidification pressure. Spherulites formed under higher …
-
Quantifying Workability, Compactability, and Cohesion Gain of Asphalt Emulsion Cold In-Place Recycling
… for HMA, were compared by evaluating densities, tensile strengths, and compaction metrics of FDR samples produced using each method. The modified Proctor hammer produced samples with the highest dry unit weights; however, samples produced using the SGC had higher tensile strengths, indicating …
-
Characterication of aggregate gland silk factor 1
… mechanical properties, including high tensile strength and toughness. Due to these outstanding material properties, scientists are rapidly pursuing the production of synthetic spider silks for a variety of different applications. In these studies, we characterize the aggregate gland …
-
Effect of Tensile Rate and Carbon Black on the Fracture of Natural Rubber and Styrene-Butadiene Rubber
Tensile strengths and ultimate elongations of both crystallizing NR and amorphous SBR increase with increasing tensile rate and increasing carbon black N115 loading, although the dependence of N115 loading is at least ten-fold stronger.Previous research has shown that edge-cut specimens of gum NR …
-
Characterizing the failure of parachute seams : the impact of stitch concentration and strain rate on ultimate tensile strength
… determine their respective Ultimate Tensile Strengths (UTS). The ratio of the seam UTS to the cloth UTS was used to determine seam efficiency. Results indicated no clear relationship between strain rate and seam efficiency in the range tested. However, a strong relationship between …
-
Insulation Impact on Shear Strength of Screw Connections and Shear Strength of Diaphragms
… presence of insulation affected the shear and tensile strengths of screw connections involving insulation. A series of diaphragm tests were also preformed to confirm the elemental tests. While the presence of insulation between two steel sheets connected by screws reduces the shear strength of …
-
Mechanical and Structural Properties of Microwave Sintered Tin-Copper-Antimony Alloys
… conditions for all three compositions. The tensile strengths obtained compared well with the strengths obtained from the casting process. Nonetheless, tensile strengths for both conventionally and microwave sintered material was higher in the transverse direction than in the longitudinal …
-
Development of a Gripping Fixture for Micro-Tensile Testing of Bonded Ceramic Dumbbells
… and the mismatch of elastic moduli influence the tensile strengths of dental bonds attaching restorative ceramics to dentin. Prior calculations indicate this to be due to peripheral interface stress singularities. A physical testing approach to examine and validate the theoretical conclusions …
-
VHPC Material Characterization and Recommendations for the Buffalo Branch Bridge Rehabilitation
… revealed that VHPC had higher compressive and tensile strengths, a higher modulus of elasticity, gained strength faster, bonded better to precast concrete, was more durable over time, and shrank less than conventional grout. The results of this research project were applied to rehabilitate the …
-
Tensile behavior of unidirectional and cross-ply ceramic matrix composites
The tensile behavior of two ceramic matrix composites (CMC's) was observed. The materials of interest in this study were a glass-ceramic matrix composite (GCMC) reinforced with Nicalon fibers and a Blackglas™ composite also reinforced with Nicalon fibers. Both had a symmetric cross-ply layup. …
Page 1 of 5