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Showing 1 to 20 of 29 for “"Creep Rupture"”.
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Creep Rupture Properties of Tin Tested at Constant Stress
This investigation was initiated to study the creep characteristics of a simple, relatively pure, material at constant stress as compared to that tested at constant load. Tin was selected for the investigation. A series of creep tests were run to rupture at constant stress and constant load. The …
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Creep rupture mechanisms in notched specimens of Rene 95
Thesis (Sc D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1987.
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Modeling and simulation of creep rupture in high-temperature alloys
… well established that one of the main causes of rupture in high-temperature alloys is intergranular cavitation: the nucleation, growth, and coalescence of voids along grain boundaries. It is also well known that intergranular voids grow under the influence of several physical processes, including …
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The creep rupture behavior of notched bars of IN-X750
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1986.
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The creep and creep rupture of SMC-R50 under different thermomechanical conditions
The creep and creep recovery behavior of a random fiber composite (SMC-R50) at elevated temperature and constant humidity were investigated experimentally and theoretically. The short time creep response for four constant stress levels at each of four selected temperature levels was experimentally …
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Effect of Porosity on the Creep Rupture Behavior of Low Alloy Steel Weldments.
… the effects of porosity on the high temperature creep characteristics of low-alloy steel weldments. The material selected for investigation was ASTM A387-D, a 2-1/4% Chromium - 1% 15 Molybdenum low-alloy steel. This material is used in the fabrication of nuclear and petro-chemical reactor …
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Simulation of Fatigue Performance & Creep Rupture of Glass-Reinforced Polymeric Composites for Infrastructure Applications
… Model has been developed. The model simulates creep rupture by imposing a fixed load of constant stress on the composite over the simulation duration. Simulation of the fatigue of glass fiber-reinforced composites is achieved by replacing the constant stress parameter in the model with a …
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The effect of the interphase/interface region on creep and creep rupture of thermoplastic composites
… region on the static mechanical properties, creep and creep rupture behavior of thermoplastic (J2) composites was investigated. The mechanical properties of the J2 composites were altered by systematic changes in fiber surface chemistry. Four fiber systems were used including the AU4, AS4(1) …
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Compression Creep Rupture of an E-glass/Vinyl Ester Composite Subjected to Combined Mechanical and Fire Loading Conditions
Polymer matrix composites are seeing increasing use in structural systems (e.g. ships, bridges) and require a quantitative basis for describing their performance under combined mechanical load and fire. Although much work has been performed to characterize the flammability, fire resistance and …
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Creep, fatigue, and environmental response of Alloy 800H tested at 900 degrees C
Creep and creep rupture studies have been carried out at 900$\sp\circ$C in lab air and in vacuum on Alloy 800H. Three different notch acuities were chosen so that the effect of stress intensity on the rupture lifetimes could be examined. The effect of oxidation on the creep rupture lifetimes has …
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Characterization and Lifetime Performance Modeling of Acrylic Foam Tape for Structural Glazing Applications
… glazing tape in both shear and tension. Creep rupture testing results provided the failure time at a given static load and temperature, and ramp-to-fail testing results provided the ultimate load resistance at a given rate of strain and temperature. Parallel testing was conducted on three …
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Burnthrough Modeling of Marine Grade Aluminum Alloy Structural Plates Exposed to Fire
… new burnthrough model based on the near melting creep rupture properties of the material. Fire experiments to induce burnthrough on aluminum plates were conducted using localized exposure from a propane jet burner and broader exposure from a propane sand burner. A material melting mechanism was …
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The nonlinear viscoelastic behavior of adhesives and chopped fiber composites
… adhesive (Metlbond 1113-2) as determined by creep and creep recovery tests is presented. A nonlinear viscoelastic characterization method of Schapery is presented and applied to the data for both materials. The nonlinear constitutive equation so obtained is used together with a delayed …
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Lifetime Estimation for Ductile Failure in Semicrystalline Polymer Pipes
… in axial tension and compression. Subsequently, creep rupture failure of the pipes under hydrostatic pressure is predicted using the model. The model predictions are validated using the experimental creep rupture failure data collected from internal pressurization of pipes using a …
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The accelerated characterization of viscoelastic composite materials
… temperature and strength is discussed. Creep rupture results are provided for a variety of geometries and temperatures for T300/934 graphite/epoxy. The results are found to compare reasonably with a modified kinetic rate theory.
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High temperature cracking of nickel chromium austenitic steels.
… in the solid state and they are synonymous with creep rupture. This form of cracking is referred to as ductility dip cracking because it is believed to be associated with a ductility minimum which occurs in some alloys. In order to study high temperature weld cracking in detail, a reliable and …
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Debonding failure of CFRP reinforced concrete beams and in-situ monitoring schemes
… methods, such as debonding, delamination, and creep rupture have led to the development of code limitations on the strength that an FRP system can be considered to provide. The uncertainty brought on by the failure methods mentioned above has become the topic of much research. Researchers have …
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Creep predictions for turbomachinery components
Several theories of creep and creep rupture are reviewed. Specific attention is devoted to the brittle damage theory proposed by Kachanov. Creep, damage and life predictions for rectangular or circular cross section beams under bending and tensile loads are presented. Comparison with data for a Ni …
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High temperature creep behavior of Inconel 617 and Haynes 230
… on the biaxial, long term, high temperature creep behavior for Alloy 617 and Alloy 230. The creep mechanisms, including dislocation creep and grain boundary sliding, were found for the stress range of 10 to 55 MPa at 850oC, 900oC and 950oC for Alloy 617. In the contrast, only dislocation …
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