The invention relates to a test arrangement for testing breakage and mechanical properties of rock particles. Test arrangement comprises: a support (1, 2); two counter-rotatable crushing wheels (3, 3′) supported on the sup-port (1, 2); and a drive arrangement (M1, M2) for rotating the crushing wheels (3, 3′), said crushing wheels (3, 3′) facing each other and defining therebetween an in-put gap (G) for the rock particles, said wheels being arranged to break the rock particles (RP) to smaller daughter particles (DP), wherein the test arrangement is arranged to receive only one rock particle at a time to be inputted to the input gap for breakage testing, an energy measurement arrangement (5, 5′) arranged to measure in-formation relating to energy absorbed by the rock particles (RP) during the breakage, a processor (PR) coupled to the energy measurement arrangement and arranged to receive, as inputs, at least one degree of breakage of the rock particles as a result of the breakage and the corresponding breakage energies absorbed by the rock particles (RP) during the breakage, to determine a correlation between the degree of breakage and the breakage energies, and to output the correlation.

The invention relates to a test arrangement for testing breakage and mechanical properties of rock particles. Test arrangement comprises a support (1, 2) and two counter-rotatable crushing rolls (3, 3′) supported on the support (1, 2) and a drive arrangement (M1, M2) for rotating the crushing rolls (3, 3′). Crushing rolls (3, 3) are facing each other and defining therebetween an input gap (G) for the rock particles, said rolls being arranged to crush rock particles (RP) to smaller daughter particles (DP). Test arrangement comprises a force measurement arrangement (7, 7) for determining the compressive strength of rock particles (RP). Force measurement arrangement (7, 7′) being coupled to a processor (PR) comprised by the test arrangement. The processor (PR) being arranged to calculate the breakage force applied to each rock particle (RP) over time. The test arrangement (TA) further comprises an energy measurement arrangement (5, 5′) for measuring information relating to energy applied to each rock particle (RP), said energy measurement arrangement (5, 5′) being coupled to said processor (PR), said processor (PR) being arranged to calculate energy applied to each rock particle (PR).

It discloses a hypergravity experimental apparatus and experimental method for interaction between brittle deformation and ductile deformation. The experimental apparatus comprises an experiment module, a control device and a drive device; the drive device comprises a centrifuge for generating a hypergravity environment and a hydraulic press for generating extensional/compressional force in an experiment box; the control device comprises a control terminal, a control cabinet and a hydraulic control station for controlling the operation of the drive device; the experiment module is provided with an experiment box and a transmission device therein, and the transmission device converts a vertical lifting force generated by a hydraulic cylinder controlled by the hydraulic press in the drive device into a horizontal pushing-pulling force.

A hardness tester includes an image acquirer (controller) acquiring an image of a surface (surface image) of a sample captured by an image capturer, an identifier (controller) identifying, based on the surface image of the sample, a non-conformity region inside the image that is unsuitable for the hardness test using predetermined conditions, and a test position definer (controller) defining a test position in an area outside the non-conformity region identified by the identifier.

Ice test devices include an ice adhesion test device. The ice adhesion test device comprises an ice adhesion test target in the form of a well in which, in use, a layer of accreted ice is built up. The target comprises a sample plate at the bottom of the well and an ice-engagement element positioned circumferentially around the sample plate and providing a side wall of the well, and wherein the sample plate is rotatable relative to the ice-engagement element. The ice adhesion test device also comprises torque means for applying a rotational torque between the sample plate and the ice-engagement element. The ice adhesion test device also comprises transducer means for, at least at a point at which the layer of accreted ice separates from the sample plate, measuring the rotational torque and/or the stress on the ice.

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.

A centrifuge rotor for measuring a characteristic of a sample subjected to centrifugation, the centrifuge rotor including: a rotor body; at least one sample holder for holding a sample; at least one on-board measurement device for measuring a characteristic of the sample held in the at least one sample holder during rotation of the rotor.

A box for transporting various products comprises a prismatic body and a closing cover formed by a multilayered material (10) including an intermediate thermal insulation board (11) with an inner face and an outer face provided with an inner coating (12) and an outer coating (13). The inner coating (12) comprises a paper sheet (121) attached to the inner face of the intermediate board (11) and a stiffening and waterproof sheet (122) that forms the inner surface of the body and the cover. The outer coating (13) comprises a first layer (131) made of strong printed paper or strong paper suitable for printing; a second paper layer (132); and a flexible and waterproof sheet (133) made of recyclable polymer and arranged between the first and the second paper layers.

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.

A bending test device to bend a product as a test includes a base, a driving mechanism, and a bending mechanism. The driving mechanism and the bending mechanism are set on the base. The bending mechanism includes a supporting member, a rotating plate, a first holding part, and a second holding part. The supporting member is set on the base. The rotating plate is rotatably set on the supporting member. The rotating plate connects to the driving mechanism. The first holding part and the second holding part are set on the rotating plate. The first holding part clamps a first part of a workpiece, the second holding part clamps a second part of the workpiece. The driving mechanism rotates the rotating plate and thus drives the second holding part to rotate and bend the workpiece.