With the increase in engine power density, temperature and stress carried by cylinder head during operation also increase. The thermal fatigue life prediction of needs to consider accurate reasonable creep-constitutive models parameters. In view wide range working conditions compacted graphite cast iron (CGI) head, creep test CGI under 450~550 °C 100~300 MPa was out, proposed characterize a mod...

Grain size is an important control on mantle viscosity and permeability, but is difficult or impossible to measure in situ. We construct a two-dimensional, single phase model for the steady state mean grain size beneath a mid-ocean ridge. The mantle rheology is modeled as a composite of diffusion creep, dislocation creep, dislocation accommodated grain boundary sliding, and a plastic stress lim...

Changes in stress applied to mantle rocks, such as those imposed by earthquakes, induce a period of evolution viscosity and microstructure. This transient creep is often modelled based on transfer among slip systems due grain interactions. However, recent experiments have demonstrated that the intragranular accumulation stresses dislocations dominant cause strain hardening olivine at low temper...

Background: The short-time creep behavior for a series of biodegradable nanocomposites which is used as implantable device into body is a crucial factor. In the current paper, we aimed to study the effect of bioactive glass nanoparticles (BGn) on creep and creep-recovery behaviors of PLA/PCL blends at different given load and different applied temperatures. Method: A series of biodegradab...