A reasonable definition of the hysteresis effect is given, according to which, the reason of the hystereesis effect is not the plastic deformation of the interfaces, but is the elastic creep of materials.

In the light of the fact that elastic creep damage happens to heat resistant steel used as pressure elements like steam pipeline and steam pockets in heat-engine plants at high temperature and under high pressure,this article gives a complete constitutive description of the damage,building up the theory of phenomenology about creep damage.

At the same load,P masoniana was stronger than E urophylla × camaldulensis in resistant to instantaneous elastic deformation,long term viscous creep and delayed elastic creep.

At the same ratio of stress to limit strength,P masoniana has greater resistant to instantaneous elastic deformation than E urophylla × camaldulensis,and was also better than E urophylla × camaldulensis in resistant to long term viscous creep and delayed elastic creep as a whole.

Load-deflection curves were obtained each time, and stiffness values were calculated from the curve. A cyclic compression force was applied as conditioning (500 ?150 N at 1 Hz for 1000 cycles) to remove excess fluid from the disc and return the disc to its predeath height.

The formulas for calculating the prestress losses due to the interaction of shrinkage and creep of concrete and relaxation of steel are presented. The formulas are derived on the base of both the theory of elastic-creep body and the mean value theorem of the integral calculus.

It dwells here upon the constitutive model of tlastic creep damage of heat resistant steel,establishing a corresponding variation principle and finite element discretization form,thus introducing complete numerical variational methods.

The PF resins with a high pH have great potential to develop delayed elastic creep.

It is found that in this case, it is not necessary to introduce any crossover from plastic creep to elastic creep models at the fishtail line.

The goal of this research was to determine the magnitude of mechano-sorptive and visco-elastic creep early in drying and to investigate the relationship of creep to moisture change and load level.

Model fitting for visco-elastic creep of Pinus radiata during kiln drying

Both one- and two-dimensional analytical models were developed with two assumptions: the visco-elastic creep could be neglected, and the diffusion coefficient is constant with moisture changes.

An elastic creep and stress relaxation of 99.96. polycrystalline copper have been inverstigated in the temperature range of 135-380- The activation energy associated with the creep was found to be 25>000-2000 calories per mole. It is much smaller than the activation energy for the volume self-diffution and is close to the activation energy for the grain boundary self-diffusion of copper. The mechanism of anelastic creep of polycrystalline copper at higher temperatures may thus be considered to be similar to...

An elastic creep and stress relaxation of 99.96. polycrystalline copper have been inverstigated in the temperature range of 135-380- The activation energy associated with the creep was found to be 25>000-2000 calories per mole. It is much smaller than the activation energy for the volume self-diffution and is close to the activation energy for the grain boundary self-diffusion of copper. The mechanism of anelastic creep of polycrystalline copper at higher temperatures may thus be considered to be similar to the mechanism of grain boundary self-diffusion.

The formulas for calculating the prestress losses due to the interaction of shrinkage and creep of concrete and relaxation of steel are presented. The formulas are derived on the base of both the theory of elastic-creep body and the mean value theorem of the integral calculus. By analyzing the test results of prestress losses,the calculating method of the intermediate values as well as the practical calculating formulas of prestress losses are given in the paper. The test results of 18 uniformly prestressed...

The formulas for calculating the prestress losses due to the interaction of shrinkage and creep of concrete and relaxation of steel are presented. The formulas are derived on the base of both the theory of elastic-creep body and the mean value theorem of the integral calculus. By analyzing the test results of prestress losses,the calculating method of the intermediate values as well as the practical calculating formulas of prestress losses are given in the paper. The test results of 18 uniformly prestressed ceramsite concrete members which had lasted 500 days were compared with the calculating results and satisfactory agreement was obtained.

Anelastie craep and stress relaxation of 99.92% polycrystalline aluminum are investigated in the temperature range of 125-225℃. The activation energy associated with the creep is found to be 25,000±1,000 calories per mole. It is much smaller than the activation energy for the volume self-diffusion and is close to the activation energy for the grain boundary self-diffusion. Anelastie creep and stress relaxation, of 99.96% polycrystalline nickel are investigated in the temperature range of 330-450℃. The activation...

Anelastie craep and stress relaxation of 99.92% polycrystalline aluminum are investigated in the temperature range of 125-225℃. The activation energy associated with the creep is found to be 25,000±1,000 calories per mole. It is much smaller than the activation energy for the volume self-diffusion and is close to the activation energy for the grain boundary self-diffusion. Anelastie creep and stress relaxation, of 99.96% polycrystalline nickel are investigated in the temperature range of 330-450℃. The activation energy associated with the creep is found to be 34,000±2,000 calories per mole. ; It is much smaller than the activation energy for the volume self-diffusion and is close to the activation energy for the grain boundary self-diffusion of nickel. The mechanism of aaelastic creep of polycrystalline at higher temperatures may thus be considered to bo similar to the mechaniam of grain boundary self-diffusion.