Instrumented indentation tests are an efficient approach for the characterization of stress–strain curves instead tensile or compression and have recently been applied evaluation mechanical properties at elevated temperatures. In high-temperature tests, rate dependence load appears to be dominant. this study, strain-rate-dependent plasticity in instrumented high temperatures was characterized t...

Molecular dynamics simulations using Tersoff potential were performed in order to study the evolution of atomic packing structures, loading states on atoms, and tensile tests, as well thermal properties Si/Ge core–shell nanowires with different structures ratios at temperatures. Potential energy pair distribution functions indicate structural features these During uniaxial testing along wire ax...

Ultra-high-performance concrete (UHPC) is a kind of building material with ultra-high strength, toughness, and durability. However, under the conditions ordinary molding technology, most fibers cannot play bridging role in direction force. In this study, UHPC specimens different steel fiber contents (0%, 2%, 4%, 6% by volume) directional reinforced were prepared. Based on split-Hopkinson pressu...

Titanium alloys exhibit mechanical and physical properties that fit structural applications demanding light-weight, corrosion resistance and biocompatibility. Ceramic reinforcements can further improve some of these mechanical properties, such as wear resistance, specific stiffness and specific strength. In comparison to continuous reinforced titanium alloys, the particle reinforced alloys (PRT...

Particulate materials loaded under uniaxial compression and tension are studied using the Discrete Element Method (DEM). Self-healing of the damaged samples is activated through sintering, a process that effectively increases the contact adhesion (i.e., the tensile strength) between particles. The initial sample is prepared from spherical particles by applying high (isotropic) pressure, where p...

20Mn5 steel is widely used in the manufacture of heavy hydro-generator shaft forging due to its strength, toughness, and wear resistance. However, the hot deformation and recrystallization behaviors of 20Mn5 steel compressed under a high temperature were not studied. For this article, hot compression experiments under temperatures of 850-1200 °C and strain rates of 0.01 s-1-1 s-1 were conducted...

Abstract Background Internal fixation is recommended for treating Vancouver B1 periprosthetic femoral fractures. Although several procedures have been developed with high stability and union rates, long-term weight-bearing constructs are still lacking. Therefore, the aim of present study was to evaluate a double-plate procedure using reversed contralateral locking compression-distal plates frac...

The deformation behavior of a two phase (y+ a2) lamellar TiAl alloy reinforced with various amounts of AITi~C carbide platelets has been examined by determining Vickers hardness at room temperature and in the temperature range 900-1300 °C. The compression flow behavior of these materials has also been examined in the semi-solid state. The hardness values for all materials dropped from about 4 G...

Nanoscale time-dependent mechanical-electrical coupled behavior of single crystal ZnO nanorods was systematically explored, which is essential for accessing the long-term reliability of the ZnO nanorod-based flexible devices. A series of compression creep tests combined with in-situ electrical measurement was performed on vertically-grown single crystal ZnO nanorods. Continuous measurement of t...

Partial forced expiratory flow-volume curves obtained by the rapid chest compression technique are being widely used to assess pulmonary function in infants and young children. The aim of this study is to assess whether in this age group flow limitation is achieved with the partial forced expiratory flow-volume curve with rapid chest compression. In eight infants and young children sedated with...