Disclosed is a device for analyzing dynamic characteristics of a carbon composite material based on a test temperature, an orientation of a carbon material, and an external loading pattern applied thereto. The device includes a sensitivity analyzer configured to calculate a frequency response function of the carbon composite material based on a physical force signal and a vibration signal; and calculate a sensitivity of the carbon composite material to each of variations in the test temperature, an orientation of a carbon material contained in the carbon composite material, and the external loading pattern applied thereto, based on the calculated frequency response function.

A method for acoustically measuring material properties of a test piece at high temperatures, includes the steps of: heating the test piece to within a testing temperature range; performing a background measurement within said testing temperature range by capturing a vibrational signal from the test piece within a calibration period, thereby obtaining a noise signal; performing an acoustic measurement on said test piece within said testing temperature range and within a testing period by: imparting a vibrational excitation onto the test piece; capturing a vibrational signal of the test piece within the testing period, thereby obtaining a vibrational response signal to said vibrational excitation, and obtaining the material properties of the test piece by analyzing the vibrational response signal, thereby taking into account the noise signal. A system is provided for acoustically measuring material properties of a test piece at high temperatures.

Disclosed is a device for analyzing dynamic characteristics of a carbon composite material based on a test temperature, an orientation of a carbon material, and an external loading pattern applied thereto. The device includes a sensitivity analyzer configured to calculate a frequency response function of the carbon composite material based on a physical force signal and a vibration signal; and calculate a sensitivity of the carbon composite material to each of variations in the test temperature, an orientation of a carbon material contained in the carbon composite material, and the external loading pattern applied thereto, based on the calculated frequency response function.

A system includes a load actuator, a strain measurement device, and a computing device. The computing device is configured to receive an unconditioned displacement signal from the strain measurement device. The unconditioned displacement signal represents displacement of a specimen under load from the load actuator. The computing device is further configured to split the unconditioned displacement signal into a measurement signal and a control signal. The computing device is further configured to filter the control signal to generate a filtered control signal and control the load actuator based on the filtered control signal. The computing device is further configured to determine a strain on the specimen based on the measurement signal.

A torque or force calibration device is for a unit intended to measure or to apply a torque or a force respectively. The device includes a first part, a second part, and at least one flexible element linking the first part to the second part. The second part is mounted to be mobile in rotation or in translation relative to the fixed first part. The device includes an abutment which limits the displacement of the second part and thereby sets the maximum torque or the maximum force of the calibration device.

An apparatus includes a holder to support an indenter relative to a sample, a depth sensor, and a controller. The operations include applying a first force on the sample with the indenter and determining a first depth of the indenter based on data generated by the sensor, moving the indenter from the first depth to a greater predetermined depth, then applying the first force on the sample with the indenter and determining a second depth of the indenter based on second data generated by the sensor, and determining a value indicative of hardness of the sample based on a difference between the first depth and the second depth. The apparatuses described can use a single scale for hardness that enables hardness values for different materials to be compared to one another.

A breakage point is detected as a change point from raw data and the data is divided before and after the breakage point to obtain divided data D1 and D2. When the low-pass filtering is performed on each of the divided data D1 and D2 (step S13) and the filtering for all divided data ends, time-series data whose natural frequency is removed is reconstructed before and after the breakage point. When the reconstruction data are connected at the breakage point, it is possible to restore the time-series data of the test force to the time-series data whose natural vibration of the test machine body is removed while taking advantage of a change in test force at the breakage point.

A method for calibrating a load testing machine includes a computational unit that is operable to carry out, in a fully automatic manner, an operation of calibration of the load testing machine in order to help reduce the cost of the operation of calibration of the load testing machine and to improve creditability thereof. The load testing machine, as well as a master load cell and a load reader thereof, is set in connection with a computational unit so that the computational unit is operable to directly output an instruction for an operation of the load testing machine and the computational unit is operable to directly record the load obtained with the load testing machine in the calibration and a corresponding calibration values from the force sensor of the testing machine. A set calibration parameters can be calculated and obtained for completing the calibration of the load testing machine.

A high-speed tensile testing machine conducts a tensile test on a test piece by applying a test force to the test piece. The high-speed tensile testing machine includes a detection unit configured to detect a test period indicating a time from when the test piece starts to deform under action of the test force to when the test piece breaks, and a determination unit configured to determine validity of a test result of the tensile test, on the basis of the test period and natural vibration of the high-speed tensile testing machine. Specifically, in the case where the test period is a predetermined multiple or more of a specific cycle indicating a cycle of the natural vibration of the high-speed tensile testing machine, the determination unit determines that the test result of the tensile test is valid.

A method for calibrating a load testing machine includes a computational unit that is operable to carry out, in a fully automatic manner, an operation of calibration of the load testing machine in order to help reduce the cost of the operation of calibration of the load testing machine and to improve creditability thereof. The load testing machine, as well as a master load cell and a load reader thereof, is set in connection with a computational unit so that the computational unit is operable to directly output an instruction for an operation of the load testing machine and the computational unit is operable to directly record the load obtained with the load testing machine in the calibration and a corresponding calibration values from the force sensor of the testing machine. A set calibration parameters can be calculated and obtained for completing the calibration of the load testing machine.