In order to study the dynamic mechanical properties of surrounding rock roadway in deep mines with burst, cyclic impact compression tests sandstone under different velocities were carried out by using split Hopkinson pressure bar (SHPB) test system, and stress-strain curves samples loads relationship between energy dissipation numbers analyzed. The results show that, as loading times increase, ...

In this paper, accumulation of plastic deformation of AISI 1045 steel plates with circular cutouts under cyclic axial loading is studied. Loading was applied under force-control conditions. Experimental tests were performed using a Zwick/Roell servo hydraulic machine. Under force-control loading with nonzero mean force, plastic strain was accumulated in continuous cycles called ratcheting. Nume...

The effect of crack angle on energy evolution during sandstone failure subjected to true triaxial cyclic loading and unloading is great concern. However, the consumed in initiation compaction process generally referred dissipated energy, which inaccurate. To reveal law breaking sandstone, a complex test carried out precast angled samples by employing system. area integral methodology exploited ...

A complete database of the mechanical properties of an epoxy polymer reinforced with uni-weave carbon fibre non-crimp fabric (NCF) is established. In-plane and through-the-thickness tests were performed on unidirectional laminates under normal loading and shear loading. The response under cyclic shear loading was also measured. The material has been characterised in terms of stiffness, strength...

Cyclic compressive loading tests were carried out on bovine femoral bones at body temperature (37 °C), with varying mean stresses (-55 to -80 MPa) and loading frequencies (0.5-5 Hz). At various times, the cyclic loading was interrupted to carry out high-energy X-ray scattering measurements of the internal strains developing in the hydroxyapatite (HAP) platelets and the collagen fibrils. The res...

This paper is concerned with analysis for the strengthening effect of carbon fiber-reinforced polymer (CFRP) on steel columns under cyclic lateral loading in thermal environment. Based on the finite element theory of thermo-elastic problem and steel structure stability theory, the hysteretic behavior of axial compression steel columns was studied by using Ansys software. The main variables inve...

On the basis of plastic bounding surface model, the damage theory for structured soils and unsaturated soil mechanics, an elastoplastic model for unsaturated loessic soils under cyclic loading has been elaborated. Firstly, the description of bond degradation in a damage framework is given, linking the damage of soil’s structure to the accumulated strain. The Barcelona Basic Model (BBM) was cons...

Background With more than half a billion adults world-wide being obese, obesity has reached pandemic dimensions. Thus, regulation of fat cell differentiation and function is of great interest for pharmacological research. The cyclic GMP (cGMP) signaling cascade plays an outstanding role in the cardiovascular system. Several studies demonstrate that cGMP signaling plays also an important role in...