The present invention relates to a device for measuring residual stress and hardness. Residual stress remaining in a metallic material due to deformation, thermal stress, or the like is a cause of various problems including degradation of mechanical properties such as fatigue strength and fracture properties and difficulty in post-processing. It is very difficult to derive a calibration curve when measuring stress by an existing non-destructive Barkhausen noise measurement method. When cross points of Barkhausen noise measurements for three or more stresses are not at one position, calibrated curves can be easily found by scaling the Barkhausen noise measurements by using calibration equations of the present invention to collect the cross points at a unique position, thereby providing a practical method of easily measuring stress of a metal by a Barkhausen noise measurement method. Therefore, according to the present invention, it is found that the internal microstructure and surface residual stress of a metal cause crossing points not to be at a unique position in a conventional Barkhausen noise measurement experiment. In addition, basic physical properties and surface residual stress of a metallic material may be measured using the above-mentioned physical feature.

For improving the signal quality while simultaneously improving the function of test objects, a load measuring arrangement includes a test object and a load measuring device for measuring a load applied between a first and a second region of the test object. The test object has a transmission region receiving a major part of the load between the first and the second region. A secondary transmission element is connected to the first and second regions of the test object so as to receive a smaller portion of the load between the first and second regions in parallel with the transmission region. The load measuring device includes a magnetic field generating device for generating a magnetic field at the secondary transmission element, and a magnetic field detection device for detecting a magnetic field parameter changing due to the load at the secondary transmission element.

A sensor arrangement for measuring a mechanical loading, comprising a first member to be mechanically loaded; a first sensor component arranged on the first member; a printed circuit board (PCB); a second sensor component arranged on the PCB and spaced from the first sensor component, wherein an output signal of the second sensor component is indicative of the distance between the first and second sensor components; and an electronic component arranged on the PCB and configured to receive the output signal of the second sensor component, wherein the sensor arrangement is configured such that the distance between the first and second sensor components depends on the mechanical loading applied to the first member.

A tensile testing machine comprising a test specimen whose elongation is to be measured along a tensile axis, slide plates, an intermediate plate, and first and second parallel guide rods, which freely guide the slide plates axially past them.

A material testing machine is provided. The material testing machine includes a force detector that detects the testing force that acts on the target to be tested; a displacement detector that detects displacement generated in the target to be tested; and a controller that controls the load mechanism. The controller includes: a differential displacement calculator that obtains a differential displacement value from a value of the displacement detected by the displacement detector and a target displacement value that has been set in advance as a test condition; and a display controller that displays, on a display device, a differential displacement graph indicating, in a form of a graph, time-series data of the differential displacement value calculated by the differential displacement calculator.

An apparatus for testing paving samples includes a base that includes a paving sample tray about the cabinet and configured for translation relative to the cabinet. A roller is configured for imparting compressive forces to a sample carried by the sample tray. An arm is configured for moving the roller from a stowed position to an in-use position where the roller contacts the sample. A cylinder assembly having a piston therein supplies pressure forces to the arm to move the arm from the stowed position to the in-use position, wherein a depth of travel of the arm is limited by the sample. As the sample is compressed, the depth of travel increases. A measurement device is in communication with the cylinder for determining an amount of travel of the arm to thus determine an amount of compression of the sample.

Disclosed herein is a concrete material comprising between 0.5% and 10% ferromagnetic fibres. Also disclosed herein is a method for measuring the strain state of a concrete material, the method comprising forming solid concrete containing between 0.5% and 10% ferromagnetic fibres in a random distribution throughout the concrete, applying an oscillating EM current to the concrete, and detecting the associated EM fields within the concrete. Also disclosed herein is the use of an oscillating EM current field to measure the strain state within a concrete material comprising between 0.5% and 10% ferromagnetic fibres.

The present invention relates to a nano-ligand for promoting cell adhesion and differentiation of stem cells and a method of promoting cell adhesion and differentiation of stem cells by using the nano-ligand, and the method of promoting cell adhesion and differentiation of stem cells according to the present invention may temporally and spatially, and reversibly control nano-ligand sliding by applying a magnetic field to a substrate including the nano-ligands, and efficiently control stem cell adhesion and differentiation ex vivo or in vivo through the magnetic-field based on spatiotemporal control.

The present invention relates to a nano-ligand for promoting cell adhesion and differentiation of stem cells and a method of promoting cell adhesion and differentiation of stem cells by using the nano-ligand, and the method of promoting cell adhesion and differentiation of stem cells according to the present invention may temporally and spatially, and reversibly control nano-ligand sliding by applying a magnetic field to a substrate including the nano-ligands, and efficiently control stem cell adhesion and differentiation ex vivo or in vivo through the magnetic-field based on spatiotemporal control.

An apparatus for testing paving samples includes a base that includes a paving sample tray about the cabinet and configured for translation relative to the cabinet. A roller is configured for imparting compressive forces to a sample carried by the sample tray. An arm is configured for moving the roller from a stowed position to an in-use position where the roller contacts the sample. A cylinder assembly having a piston therein supplies pressure forces to the arm to move the arm from the stowed position to the in-use position, wherein a depth of travel of the arm is limited by the sample. As the sample is compressed, the depth of travel increases. A measurement device is in communication with the cylinder for determining an amount of travel of the arm to thus determine an amount of compression of the sample.