UNLABELLED We quantified the impact of 60-day head-down bed rest (HDBR) with countermeasures on arterial and venous response to tilt. METHODS Twenty-one males: 7 control (Con), 7 resistive vibration exercise (RVE) and 7 Chinese herb (Herb) were assessed. Subjects were identified as finisher (F) or non-finishers (NF) at the post-HDBR 20-min tilt test. The cerebral (MCA), femoral (FEM) arterial...

Computationally solving the equations of elasticity is a key component in many materials science and mechanics simulations. Phenomena such as deformation-induced microstructure evolution, microfracture, microvoid nucleation are examples applications for which accurate stress strain fields required. A characteristic feature these simulations that problem domain simple (typically rectilinear repr...

There is an increased demand for cement nanocomposites in the twenty-first century due to their composition, higher strength, high efficiency, and multiscale nature. As carbon nanotubes (CNTs) possess extremely resilience, stiffness, inclusion of small quantities concrete mix makes them a multifunctional material. A molecular level understanding significant capacitate macrolevel properties thes...

Abstract Intermittent mechanical loads combined with high temperatures appear during the operation of turbines in jet engines or power plants, which can lead to high-temperature fatigue thermomechanical fatigue. Since assessment properties is a complex and time-consuming process, it essential develop validated material models that are capable predicting behavior, thus allowing extrapolation exp...

A synergistic stiffening effect observed in the elastic mechanical properties of LBL assembled polymer/ clay nanocomposites is studied via two continuum mechanics approaches. The nanostructure of the representative volume element (RVE) includes an effective interphase layer that is assumed to be perfectly bonded to the particle and matrix phases. An inverse method to determine the effective thi...

Carbon nanotubes (CNTs) demonstrate unusually high stiffness, strength and resilience, and are therefore an ideal reinforcing material for nanocomposites. However, much work has to be done before the potentials of CNT-based composites can be fully realized.  Evaluating the effective material properties of such nanoscale materials is a very difficult tasks.  Simulations using molecular dynamics ...