The long-term service life of polymers can be estimated with much shorter experiments by applying the time temperature superposition principle (TTS). In this approach, data is obtained at different temperatures, usually through a stepped isothermal method (SIM) on same sample. Dynamic mechanical analysis (DMA) instruments offer two measurement methods to obtain SIM data: (i) static creep tests ...

Original scientific paper The nonlinear creep characteristics of typical clays in the coastal area of Tianjin were studied by consolidated-undrained triaxial creep tests. The tests were performed via the stepwise loading method, and the creep curves of the soft clays under different stress states were obtained from the raw data processed by Chen and Kang’s method. The experiments showed that th...

ABSTRACT: The authors have proposed and discussed temporary storage of heated water in openings excavated in rock mountain from the viewpoints of multiple-utilization of land, environmental safeguards, energy conservation, etc. When used for heated-water storage, the rock mass around the openings will receive the effects of the heated water. In this study, a uniaxial compression creep test at h...

One of the yet unresolved engineering problems is forecasting the creep lives of weldment in a pragmatic way with sufficient accuracy. There are number of obstacles to circumvent including: complex material behavior, lack of accurate knowledge about the creep material behavior specially about the heat affected zones (HAZ),accurate and multi-axial creep damage models, etc. In general, creep life...

The effects of water and iron content on the relative creep strengths of garnet and olivine were investigated by shear deformation experiments. arnet and olivine samples were sandwiched together between alumina pistons in a simple shear geometry and were deformed at P= 1–2 GPa, = 1473 K and strain rates ranging from 10−5 to 10−3 s−1 using a Griggs-type solid-medium apparatus. The stressand stra...

Creep damage is one of the serious problems for the high temperature industries and computational approach (such as continuum damage mechanics) has been developed and used, complementary to the experimental approach, to assist safe operation. However, there are no ready creep damage constitutive equations to be used for predicting the lifetime for this type of alloy, particularly for low stress...

S OF PAPERS 235 90 Creep compliance of chicken nuggets at different frying temperatures. T. Yalamanchili*1, P. Takhar2, and C. Z. Alvarado1, 1Texas A&M University, College Station, 2Texas Tech University, Lubbock. The texture of chicken nuggets is a very important attribute to consumers. However, there is little data indicating textural properties of chicken nuggets during frying utilizing cree...

The wheel tracking test (WTT) has been extensively used for laboratory characterization of permanent deformation hot mix asphalt (HMA). However, the fully-confined setup device is unable to capture tertiary zone where shear takes place. This makes resistance characteristics HMA difficult analyze. Hence, a modified tracker (MWT), with unconfined lateral sides along direction was utilized in this...

Strain is generated in concrete subjected to elevated temperatures owing to the influence of factors such as thermal expansion and design load. Such strains resulting from elevated temperatures and load can significantly influence the stability of a structure during and after a fire. In addition, the lower the water-to-binder (W-B) ratio and the smaller the quantity of aggregates in high-streng...