نتایج جستجو برای: short term creep
تعداد نتایج: 897485 فیلتر نتایج به سال:
D. A. Skobir Balantič, B. Žužek, F. Vodopivec, Institute of Metals and Technology, Ljubljana, Slovenia Specimens of high chromium creep resistant steel were tempered at 800 °C for different times and examined in SEM. After short tempering stringers of cementite particles are formed at ferrite grain boundaries. By longer tempering, the content of chromium and molybdenum increase up to Cr18Fe3Mo2...
A silicon load cell (force sensor) is presented which is based on a new operating principle. The force is measured by compressing a meander like strain gage. A second strain gage which is not loaded, is used for temperature compensation and for compensation of bending and stretching stresses in the chip. Also, same changes in zero load resistor values are eliminated. It is shown that the output...
The mechanical and neurological properties of ligaments are reviewed and updated with recent development from the perspective which evaluates their role as a source of neuromusculoskeletal disorders resulting from exposure to occupational activities. Creep, tension-relaxation, hysteresis, sensitivity to strain rate and strain/load frequency were shown to result not only in mechanical functional...
De Zee, M., F. Bojsen-Møller, and M. Voigt. Dynamic viscoelastic behavior of lower extremity tendons during simulated running. J Appl Physiol 89: 1352–1359, 2000.—The aim of this project was to see whether the tendon would show creep during long-term dynamic loading (here referred to as dynamic creep). Pig tendons were loaded by a materialtesting machine with a human Achilles tendon force profi...
Superior creep strength of a heat resistant AX52 magnesium alloy is ascribed to the grain boundary eutectic Al2Ca phase covering the primary -Mg grains. The eutectic phase is stable in morphology at temperatures below 473K, while it collapses during long term exposure at temperatures higher than 473K. The microstructural change of the alloy during high temperature exposure is characterized by t...
A high temperature measurement system for creep deformation based on the digital image correlation (DIC) technique is described. The new system is applied to study the behaviour of a multi-pass welded joint in a high temperature tensile test and a load controlled creep test at 545°C. Spatially resolved tensile properties and time dependent creep deformation properties across a thick section typ...
A high temperature measurement system for creep deformation based on the digital image correlation (DIC) technique is described. The new system is applied to study the behaviour of a multi-pass welded joint in a high temperature tensile test and a load controlled creep test at 545°C. Spatially resolved tensile properties and time dependent creep deformation properties across a thick section typ...
The long-term consolidation settlement of soft soils under infrastructures is seriously concerned in coastal areas. In practice, soil ground usually composed multiple layers with different properties, and the effect creep nonnegligible. However, conventional analysis, seldom included during “primary” consolidation. With model, strain will reach infinity time, which unreasonable view. this study...
The creep response in the air of commercially pure titanium was investigated at 550, 600, and 650 °C to assess effect oxidation on mechanical response. Experiments demonstrated that prolonged exposures high temperatures produced a marked reduction minimum rate under given applied stress. Microhardness measurements showed hardened zone formed proximity surface due oxygen penetration into metal. ...
The superheater and re-heater piping components in supercritical thermal power units are prone to creep fatigue failure fracture after extensive use due the high pressure temperature environment. Therefore, safety assessment for superheaters re-heaters such an environment is critical. However, actual service operation data frequently insufficient, resulting low accuracy of assessment. Based on ...
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