A hose to be evaluated is installed on a fixing frame in a preset shape, and a strain gauge and markers are attached to a surface of the hose. During a course of application of predetermined internal pressure to the hose, strain data is acquired using the strain gauge and an image of an external shape of the hose is captured using a camera device to acquire image data. Based on the strain data and the image data acquired, a change in the shape of the hose between a plurality of time points at identical internal pressure is determined. Such hose fatigue resistance evaluation method can determine changes in the degree of deformation of a hose over time due to repeated application of internal pressure.

The present disclosure provides a stress gradient loading test apparatus and a method of accurately determining loading energy, relating to the technical field of a rock mechanical test. The apparatus includes an upper pressure-bearing plate, a specimen fixing device, a stress transfer device, and a simulation specimen. A computer processes stress and strain monitoring data. The stress transfer device includes a plurality of plate-like high strength materials in combination. A simulation roadway is opened in the simulation specimen, and a strain gauge and a stress sensor are disposed on the simulation specimen. In a test using the apparatus, stress gradient loading is realized and elastic strain energy is calculated by the plate-like high strength materials with different stiffnesses of the stress transfer device, and loading energy acting on the simulation specimen is calculated in combination with energy applied by a tester.

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.

A system and method for performing a tear test are described herein. The system may include a fixed clamping station configured to hold a first portion of a film specimen and a movable clamp coupled to an actuator, the movable clamp may be configured to hold a second portion of the film specimen. The movable clamp may be configured to move in a direction away from the fixed clamping station to tear the film specimen. The system may include a slitter blade configured to cut the film specimen at a location between the fixed clamping station and the movable clamp. The system may include a load cell coupled to one of the fixed clamping station and the movable clamp. The load cell may be configured to measure a force associated with tearing of the film specimen. The actuator may be configured to manipulate the movable clamp along a trajectory.

The invention relates to a test apparatus and a method for testing a load change of a compressed-gas accumulator, said method comprising the steps of: i. arranging the compressed-gas accumulator to be tested inside a test container; ii. increasing the pressure of a compressed gas in the compressed-gas accumulator to a test pressure; iii. measuring the elastic deformation of the compressed-gas accumulator, which is caused by the test pressure of the compressed gas; iv. Increasing the pressure of a pressure medium in the test container such that the elastic deformation of the compressed-gas accumulator is reduced by the pressure of the pressure medium on the compressed-gas accumulator; v. lowering the pressure of the pressure medium in the test container; and vi. repeating steps iii. to v.

The present disclosure discloses a flexible display auxiliary device and a foldable mobile terminal. The flexible display auxiliary device includes a platform, a first stage, a second stage, a sliding mechanism and an enabling mechanism. The first stage is used for fixing the first end of the flexible display screen, the second stage is used for fixing the second end of the flexible display screen opposite to the first end. The second stage is fixedly arranged on the sliding mechanism, the sliding mechanism is arranged on the platform, the enabling mechanism is connected to the sliding mechanism to control the sliding mechanism to move on the platform so as to change the relative distance between the first stage and the second stage and change the tension on the flexible display screen. In the above manner, the present disclosure enables the flexible display to always be in a flat state.

An example flexible substrate testing system includes: a first substrate support structure configured to hold stationary a first portion of a flexible substrate under test; a second substrate support structure configured to hold a second portion of the flexible substrate; an actuator configured to move the second substrate support structure to fold the flexible substrate and to unfold the flexible substrate; and a load cell configured to measure a load on the flexible substrate.

Disclosed herein are systems, devices and methods for creep testing selected materials within a high-temperature molten salt environment. Exemplary creep testing systems include a load train for holding a test specimen under a load within a heated inert gas vessel. An extensometry system can be included to measure elongation of the test specimen while under load. The extensometry system can include fixed members and axially translating member that move along with the elongation of the test specimen, and the system can include a sensor to measure the relative axial motion between such components to measure elongation of the test specimen over time. The test specimen can include a cylindrical gage portion having an internal void filled with a molten salt during creep testing to simulate the corrosive effect of the molten salt on the specimen material during testing.

There is provided a material testing machine that a control device of the material testing machine includes a detection circuit which extracts a resistance component caused by the physical quantity and a capacitive component caused by an electrostatic capacitance of the cable from a measurement signal from the detector, a memory element which stores a normal capacitive component extracted by the detection circuit, and a comparator which compares the current capacitive component extracted by the detection circuit with the normal capacitive component, and when a comparison result from the comparator indicates that a value of the current capacitive component varies beyond a predetermined allowable range with respect to the normal capacitive component, it is treated that the cable is disconnected, and a disconnection warning is provided.

An example flexible substrate testing system includes: a first substrate support structure configured to hold a first portion of a flexible substrate under test; a second substrate support structure configured to hold a second portion of the flexible substrate; one or more actuators configured to move the first and second substrate support structures at respective angles to fold the flexible substrate; and load cells configured to measure loads on the first substrate support structure and the second substrate support structure while the actuator moves the first substrate support structure and the second substrate support structure.