A dropping test device includes a base, a lifting assembly formed on the base, a resetting component, and a transmission assembly. A to-be-detected component is formed on the base. The lifting assembly includes at least one cantilever, at least one cam, and a rotating shaft. The cantilever and the cam are fixed on the rotating shaft. The rotating shaft drives the cantilever and the cam rotates. The cantilever lifts one end of the to-be-detected component during rotating. The resetting component abuts on the cam. The cam drives the resetting component towards the to-be-detected component as the cam is rotating. The resetting component drives the to-be-detected component to return to an original position. The transmission assembly is connected to the rotating shaft and drives the rotating shaft to rotate.

A system for simulating in situ drilling and treatment conditions on a core sample from a subterranean formation. The system re-creates various subterranean loads and temperatures on a test sample representative of actual in situ conditions from the particular formation while a test structure within the system performs drilling activities on the core sample using drilling and treating under evaluation for use in the particular subterranean formation. Thus, the impact on selected drilling and treating fluids can be evaluated as well as the impact those fluids had on a sample from the subterranean formation under in situ conditions.

A method for testing a helmet for effectiveness of user protection includes moving a load along a predetermined path, supporting a target body at an impact location in the predetermined path, the target body including a head model and a helmet disposed on the head model, and impacting the target body with a force generated by the moving of the load. The impacting of the target body entails contacting the target body with an impactor free to move perpendicularly and tangentially relative to a surface of the target body. The supporting of the target body is at least reduced, if not eliminated, before or during the impact of the impactor with the target body at the location. Forces generated are automatically measured or sensed during the impact of the impactor with the target body at the location.

The invention relates to a device for carrying out bending tests on panel-shaped or beam-shaped samples (1), in which two rotary drives are arranged at a distance from one another and a flange (3) is fastened to each of the drive shafts of the rotary drives, said drive shafts being oriented parallel to one another. At least two bar-shaped bending elements (2) oriented parallel to the axis of rotation of the drive shafts and arranged at a distance from the axis of rotation and at a distance from one another are provided on each of the flanges (3). A panel-shaped or beam-shaped sample (1) can be introduced between the two bar-shaped bending elements (2) on the two flanges (3). In the event of rotation of the rotary drives in opposite directions of rotation, bending forces are exerted on the sample (1) and each of the two rotary drives can be controlled individually and connected to an electronic open-loop or closed-loop control unit.

A device for testing a rotor blade of an aircraft. The device is configured to receive and secure a shaft of the rotor blade. Once secured, the device is configured to allow for inputting combined loads and bending moments into the rotor blade to simulate the rotor blade behavior in flight. A testing assembly is also disclosed that includes the device and the rotor blade and methods of use that provide for testing the rotor blade.

A mechanical material property test fixture for testing a material, the fixture includes a plurality of beams disposed on one geometrical plane, a plurality of linear bearings, a plurality of hinged linkage bars, and an apparatus that applies force on the plurality of linear bearings such that the material being tested has a uniform force applied on it by the fixture. Each beam has substantially equal angles between adjacent beams, while each linear bearing is disposed on a corresponding beam. The linear bearings are attachable to the material being tested. Each linkage bar communicates with two adjacent linear bearings such that the linear bearings can freely slide along the corresponding beam. The linkage bars are substantially the same length such that a symmetric multi-axial movement in the linear bearings is created, and allows for equal force to be applied to the material.

An experiment device for aiding in measuring abrasion of a conveyer, and a method for detecting abrasion of a conveyer, are provided. The device includes a rack, a reciprocation sliding mechanism, a speed adjusting mechanism and a crankshaft. The reciprocation sliding mechanism can include scrapers and scraper chains, and the scraper chains can be arranged between an upper-layer scraper and a lower-layer scraper. The speed adjusting mechanism can include a motor, a friction driving wheel and a friction driven wheel, and the motor is connected with the friction driving wheel through a motor shaft. The friction driving wheel slides on a shaft in an axial direction, and speed adjustment can be achieved by changing the distance between the centers of the friction driving wheel and the friction driven wheel.

The present invention proposes a ground compactor with a ground compaction drum rotating about a rotation axis during compaction of a substrate, wherein the ground compaction drum includes a deformation sensor for detection of an elastic deformation of the ground compaction drum in order to determine a degree of stiffness of the substrate.

An apparatus for measuring a degree of cure and a specific volume of a packaging material is provided, including: an upper load module configured for driving the rotation of an upper ball screw via an upper servo motor such that a force plate coupled to the upper ball screw moves downward and is thus positioned; a lower load module having a lower ball screw operating and moving via a lower servo motor such that a load joint group connected to the lower ball screw generates a corresponding displacement; an upper film cavity module connected to the upper load module; and a lower film cavity module disposed on the lower load module. The displacement of the load joint group enables a push rod to move upward. A heating pipe keeps constant the temperature of a subject to be measured in a cavity of the lower film cavity module.

The present application provides a testing device. The testing device includes: a box, a pressing mechanism, a sliding mechanism, a transmission mechanism, and first clamping mechanisms. The pressing mechanism is located inside the box. A gap between the pressing mechanism and the first side of the box is used to place substrates to be tested. The pressing mechanism is slidably connected to the sliding mechanism. The transmission mechanism is connected to the pressing mechanism to drive the pressing mechanism to move. Each first clamping mechanism is used to hold one of the substrates to be tested.