Macroscopic superplastic behaviour of metallic or non metallic materials is usually represented by the strain rate sensitivity, and it can be determined by tensile tests at elevated temperature. However, a uniaixal stress state occurs in the test whilst a multiaixal stress state is induced in actual superplastic forming processes. The difference of the stress state might affect the reliability ...

During deep inspirations (DI), a distending force is applied to airway smooth muscle (ASM; i.e., stress) and the muscle is lengthened (i.e., strain), which produces a transient reversal of bronchoconstriction (i.e., bronchodilation). The aim of the present study was to determine whether an increase in ASM stress or the accompanying increase in strain mediates the bronchodilatory response to DI....

The strain aging and hydrogen embrittlement behavior of two bake hardening (BH) steels with different microstructures were investigated in this study. single-phase BH steel was composed fully ferrite, while the dual-phase consisted ferrite 3 % martensite. index (AI) measured to compare effect microstructure on behavior. As a small amount martensite is present steel, value higher than that AI sh...

Coal and rock dynamic disasters occur frequently in deep coal mining. The loading rate affects the mechanical properties behaviors. Uniaxial compression acoustic emission (AE) tests of bump-prone under various rates were carried out, properties, AE spatiotemporal evolution, spatial fractal characteristics analyzed. experimental results indicate that uniaxial compressive strength is positively r...