Dynamic recrystallization, DRX, behaviour of a precipitation hardened, PH, stainless steel was studied in connection with microstructural developments in a compression test. The experimental results showed that the dominant mechanism of softening is DRX, but at high strain rates and low temperatures, ie, high Zener-Holman parameter, Z, work hardening and dynamic recovery, DRV, produced a pancke...

An adaptable algorithm is proposed in this study, which can predict the complete load-shortening curve of a stiffened panel subjected to uniaxial longitudinal compression. The provides an extension existing empirical formulae initially derived for predicting ultimate compressive strength panels. Based on observations from series nonlinear finite element analyses, behaviour panels idealised with...

Compressive and tensile properties of a carbon nanotube (CNT) reinforced 2024Al composite are investigated under quasi-static dynamic compression as well tension, along three different directions (extrusion, normal transverse directions). Upon compression, yield fracture strengths the show negligible strain rate effect mechanical anisotropy manifested in compressive stress–strain curves. Fracto...

Hot deformation behavior of a medium Cr/Mn Al6061 aluminum alloy was studied by isothermal compression test at temperatures range of 320 to 480 °C and strain rates range of 0.001 to 0.1 s −1. The true stresstrue strain curves were analyzed to characterize the flow stress of Al6061. Plastic behavior, as a function of both temperature and strain rate for Al6061, was also modeled using a hyperboli...

Abstract Background The cylindrical profile model (CPM) is commonly used to convert the load–displacement measurement from axis-symmetric compression test (ACT) flow curve. ignores barrelling of sample which results in serious curve distortion and underestimation effective stress strain. To minimize these, a new solution ACT with heterogeneous deformation proposed this work as an alternative CP...

STUDY DESIGN Retrospective study. PURPOSE To investigate whether intersegmental compression can affect the results of threedimensional correction for idiopathic scoliosis. OVERVIEW OF LITERATURE Intersegmental compression is usually performed to increase the correction rate and enhance kyphosis restoration. However, it is presumed that the risk of decompensation is increased. METHODS Twen...

Recently, a theory, developed by DeVore, Jawerth, and Popov, of nonlinear approximation by both orthogonal and nonorthogonal wavelets has been applied to problems in surface and image compression by DeVore, Jawerth, and Lucier. This theory relates precisely the norms in which the error is measured, the rate of decay in that error as the compression decreases, and the smoothness of the data. In ...

We propose an adaptive geometry compression method based on 4-point interpolatory subdivision schemes. It can work on digital curves of arbitrary dimensions. With the geometry compression method, a digital curve is adaptively compressed into several segments with different compression levels. Each segment is a 4-point subdivision curve with a subdivision step. In the meantime, we provide high-s...

The thermal expansivities (a) of MgO and highpressure phases of CaO, CaMgSi2Ot, and Fe at ultrahigh pressure are obtained by comparing existing shock compression and temperature measurements to 300 K compression curves constructed from ultrasonic elasticity and static compression data. For gO, erepesend = where 7' is the Grtineisen parameter, Cv is the constant volume specific heat, Kr is the i...