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Showing 1 to 20 of 54 for “"fracture resistance"”.
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Fracture Resistance of Coated Polycrystalline Silicon Wafers
… and reliability and can lead to premature fracture. This becomes important in applications in which silicon-based devices are subject to cyclic loadings, such as winds (on roofs) and mechanical vibrations (in cars). The wafers may also be subjected to temperature changes due to seasonal and …
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Influencing parameters on the fracture resistance of aluminum alloys.
Massachusetts Institute of Technology, Dept. of Civil Engineering. Thesis. 1971. M.S.
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Structural behavior of fiber reinforced mortar related to material fracture resistance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1989.
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Fracture resistance of calcium hydroxide-treated teeth filled with water- and PBS-mixed MTA
… of in vitro studies on influence of CH on fracture strength showed reduction in the mechanical properties of radicular dentine after 5 weeks exposure (Yassen & Platt 2013). MTA may increase the resistance to vertical root fracture of endodntically treated teeth treated in one-visit …
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Quantification and Characterization of Fracture Resistance in Asphalt Concrete Based on R-Curve Method
<p>The application of fracture energy is widely applied in the evaluation of cracking in the laboratory for asphalt concrete. However, this single number does not provide information on the characterization of the initiation and propagation of cracks. The Resistance Curve method, or R-Curve, is …
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Fracture resistance of molars restored with different types of ceramic partial coverage restorations : an in-vitro study
In this study, the survival rate and fracture strength of ceramic inlays, different types of onlays and unprepared teeth were compared, after exposure to the artificial mouth. <br>Ninety-six caries-free human upper first molars were used for the experiment. The teeth were randomly divided into five …
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Development of a phenomenological constitutive model for fracture resistance degradation of asphalt concrete with damage growth due to repeated loading
… the AC materials which become less resistant to fracture. Even a small load can result in fracture failure of AC pavements when the loss of strength in AC pavements progresses significantly through repeated loading. The current approach to determine the critical properties of AC materials is to …
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Assessment of Fracture Resistance of Asphalt Overlays through Heavy Vehicle Simulator and Laboratory Testing: Synthetic Fiber and Rubber Modified SMA Mixes
… showed that the fiber-modified mix had a higher resistance to fracture, which increases the pavement life by approximately 50%. The second experiment compared the cracking resistance of the same control and modified mixes in the laboratory. Four cracking resistance tests were performed on each …
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An In-Vitro Study Evaluating the Fracture Resistance and Insertion Torque of Self-Drilling Mini-Implants Upon Insertion Into Synthetic High Density Mandibular Bone.
… but there is little information regarding their fracture resistance in areas of high density bone without pre-drilling. Purpose: To determine the peak fracture torques of six commonly used self-drilling mini-implants, and to examine how each performs in extreme conditions without pre-drilling. …
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Mechanical Behavior of Posterior Implant Supported Restorations
… study was designed to evaluate the fatigue and fracture resistance of different CAD/CAM customized implant-supported restorations using two materials, monolithic zirconia and monolithic lithium disilicate and using two crown designs, hybrid-abutment-crowns and hybrid-abutments with separate …
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Fracture mechanics in the semigrand canonical ensemble
… simulation method to assess the quasi-static fracture resistance of materials. Set within a semigrand canonical Monte Carlo (SGCMC) simulation environment, an auxiliary field –the bond rupture potential– is introduced to generate a sufficiently large number of possible microstates in the …
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Effects of Surface Microstructure on the Strength of Adhesively Bonded Structures
… on the influence of surface roughness on the fracture resistance of an aluminum-epoxy interface. A layered double cantilever beam (LDCB) specimen was chosen for this experiment. The LDCB specimen was debonded by peeling off the epoxy layer from the aluminum substrate using a steel wedge. …
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Characterizing the Durability of PF and pMDI Adhesive Wood Composites Through Fracture Testing
… using the double-cantilever beam (DCB) method of fracture testing. The relative durability of phenol-formaldehyde (PF) and isocyanate (pMDI) adhesives was compared using a 2-hour boil test and an environmental test. The feasibility of using oriented strandboard (OSB), oriented strand lumber (OSL) …
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Molecular Dynamics Investigation on the Fracture Behavior of Nanocrystalline Fe
… a combination of intragranular and intergranular fracture is observed. Mechanisms such as grain boundary accommodation, grain boundary triple junction, grain nucleation and grain rotation are observed to dictate the plastic deformation energy release. Intergranular fracture is shown to proceed by …
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Effects of microstructure and strain ageing on toughness of nuclear PWR reactor weld metals
… on ductile-to-brittle transition temperature, fracture toughness and cleavage fracture resistance of a multi-pass low-alloy ferritic steel weld metal have been investigated. The weld metal simulated submerged arc welds used in the fabrication of Sizewell B power station reactor pressure vessel. …
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Fracture and Friction Characterization of Polymer Interfaces
… This thesis attempts to characterize the fracture resistance of AM materials produced by the PolyJet process. Test standards established for mode I fracture testing of adhesive joints are adapted to evaluate the fracture resistance and interface between two printed acrylic-based …
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Synthesis and characterization of in situ whisker-reinforced glass-ceramics
… strength is improved from 72 to 134 MPa. Fracture toughness, K<sub>Ic</sub>, is increased from the 1.1 to 1.6 MPa·m<sup>1/2</sup> due to crack deflection by the Ti0₂ whiskers. In situ Ti0₂ whisker-reinforced glass-ceramic exhibits rising fracture resistance, K<sub>R</sub>, with increasing …
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Atomistic simulations of deformation in Metallic Nanolayered Composites
… to changes in h.</p><p>The study of the fracture behavior of MNCs shows that cracks in Cu and Nb layers may exhibit different propagation paths and distances under the same external loading. Interfaces can improve the fracture resistance of the Nb layer in Cu/Nb MNCs by providing mobile …
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Performance evaluation of warm mix asphalt mixtures incorporating reclaimed asphalt pavement
… with sufficient stiffness and moisture and fracture resistance. This study evaluates the potential of WMA technologies and their integration with RAP. Initially, an extensive literature review was completed to understand the advantages, disadvantages, and past field and lab performance of …
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MECHANISTIC STUDY OF CRACK INITIATION AND PROPAGATION IN CROSSLINKED ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENES (UHMWPE) SUBJECTED TO STATIC AND CYCLIC LOADING
… vivo mechanical loads. Reports suggest that the fracture resistance of UHMWPE could be improved which can help the longevity of the components in vivo. Fatigue crack propagation behavior of two crosslinked UHMWPE formulations was investigated to estimate the mechanical governing factor for stable …
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