Answer to: Determine the creep compliance J(t) of a material that responds like: an elastic spring with Young's modulus E. By signing up, you'll...
On the determination of material creep constants using miniature creep test specimens[J]. ASME, Journal of Engineering Materials and Technology, 2014, 136(2): 021006.T.H. Hyde, B.S.M. Ali, W. Sun, On the determination of material creep constants using miniature creep test specimens, J. ...
constants K, Q c , and n describe the creep of a given material and if they are known, you can calculate the steady state creep rate at any temperature and stress using equation 2. However, these parameters vary from material to material, and have to be determined experimentally. Test Pro...
A method for determining the power law creep constants using the small punch (SP) creep test is studied. We performed elastic-plastic-secondary creep finite-element (FE) analysis of Gr91 (ASTM A387 GR91 CL2) steel using the properties at 565 °C to investigate the evolution of stress and...
where ε˙0(s−1), σ0(N/m2) and n are creep constants. The behavior of creeping components is summarized in Figure 6.8 which gives the deflection rate of a beam, the displacement rate of an indenter and the change in relative density of cylindrical and spherical pressure vessels in ter...
of the creep test for soft hot worked materials. The density reaches a stationary value in the secondary stage. There are many possible alternative scenarios for example with a hard cold worked material or continuous precipitation in the primary stage. However, we will only consider the main one...
1 Creep of Metal-matrix Composites Creep is the time-dependent plastic deformation of materials, which is important at temperatures above half of the melting point of a metallic material in kelvin (Riedel 1987). Creep strongly depends on microstructure, stress, and temperature. During tensile creep...
A method has been developed that allows the material constants of complex creep constitutive equations to be determined from the knowledge of the constitutive equations of a base material, and a set of normalized material property ratios. These ratios are based on the global features of creep behav...
Figure 1.Typical creep behavior of a material, and the corresponding Burgers model. The creep behavior, from instantaneous elastic strain to steady-state creep after loading, can be described by the Burgers model, given in Equation (1). The constants of this model allow a quantitative understandi...
where C(= A· B), A and B are constants; d and δ are grain diameter and grain boundary thickness, respectively. This model may explain the second power relationship of the creep rate vs. stress in the current experiments at room temperature. Another issue to be addressed is that the no...