A bending applying device includes three mandrels and applies bending to an optical fiber by winding the optical fiber onto the mandrels. The mandrels are alternately arranged at predetermined intervals such that outer circumferences of adjacent mandrels in a longitudinal direction of the optical fiber face each other in a non-contact manner. A diameter of the optical fiber is D, a radius of the mandrel is r, an interval between the adjacent mandrels in the first direction is 2r + d, a direction orthogonal to the first direction is a second direction, an interval between the adjacent mandrels in the second direction is s, and an angle θ between the second direction and a common internal tangent of the adjacent mandrels is 0 degrees or more and 45 degrees or less, and the formed angle θ satisfies following formula.

[00001]$\sqrt{\left(d+D+4r\right)\left(d-D\right)+s^2}=2\left(r+\frac{D}{2}\right)\tan \theta +\frac{s}{\cos \theta }$

Disclosed is a test rig and a method for mechanical load testing of a specimen extending along a longitudinal axis from a first specimen end to a second specimen end and comprising a composite material extending along the longitudinal axis from a first composite end to a second composite end and a primary elongate component extending along the longitudinal axis from a first primary component end to a second primary component end, the first primary component end being the first specimen end, and wherein the composite material encapsulates the primary elongate component along a first interface region extending along the longitudinal axis from the second primary component end to the first composite end. The method comprises applying a load to the specimen resulting in an axial load component and a bending moment being imposed to the specimen.

Disclosed is an electro-magneto-thermo-mechanical dynamic and synchronous loading device based on a wedge-shaped rotating body. The device comprises a carrier, a wedge-shaped rotating body and a pulse power supply, wherein the wedge-shaped rotating body is positioned above the carrier, the pulse power supply is connected to the carrier and the wedge-shaped rotating body through conductors, a test object is fixed on the carrier, the top of the wedge-shaped rotating body is connected to the output end of a driving shaft through a transmission shaft, the driving shaft drives the wedge-shaped rotating body to rotate and can apply downward pressure, and the wedge-shaped rotating body can be pressed against the test object and rotate on the surface of the test object.

A method and apparatus for rotating a test specimen and simultaneously applying a torque, bending moment, and an axial load without the applied forces interfering with each other.

Proposed is an auto-flattening control method that is an auto-flattening control method for determining a minimum driving value of tension that is applied to a sample coupled at both sides to a moving unit and a winding unit, respectively. The auto-flattening control method includes a sample rotation step of rotating the winding unit at a preset reference angle, a setup value checking step of monitoring a rotation load that is applied to a sample by rotation of the winding unit, and a setting comparison step of comparing variations between an N-th (a natural number larger than 0) rotation load and an N-1-th rotation load for the rotation load that is monitored through the setup value checking step.

A testing tool for testing a flexible display includes a platform, a first mechanical component and a second mechanical component. The platform includes a plane. The first mechanical component is disposed on the plane to drive the flexible display to move, wherein the first mechanical component includes a first clamping unit connected to a first end of the flexible display. The second mechanical component is disposed on the plane opposite to the first mechanical component, wherein the second mechanical component includes a second clamping unit connected to a second end of the flexible display.

The fatigue cracking machine for circumferential notched tensile (CNT) specimens is a device for pre-cracking a CNT specimen prior to SCC testing. The machine uses a specimen holding cylinder attached to the shaft of a motor by a coupling, the holding cylinder being rotatably mounted in a bearing mounted in a bearing support fixed to a platform. The machine also uses a load cylinder rotatably mounted in a load bearing supported in a load fork, the load fork having a shaft adjustably mounted in a bearing support block. A dial indicator is fixed to a post rigidly mounted on the platform with the indicator's plunger bearing against the load bearing. An adjustment bolt bears against the end of the load fork shaft to displace the load bearing, applying a bending force to the specimen while it rotates, the displacement being measured by the dial indicator.

A method and apparatus for testing a specimen with pressure, applying a torque using one or more plates coupled to the test specimen, applying a bending moment, and/or applying an axial load, either separately or simultaneously, with or without rotating the specimen, and without the applied forces interfering with each other.

A method and apparatus for testing a specimen with pressure, applying a torque using one or more plates coupled to the test specimen, applying a bending moment, and/or applying an axial load, either separately or simultaneously, with or without rotating the specimen, and without the applied forces interfering with each other.

A method and apparatus for rotating a test specimen and simultaneously applying a torque, bending moment, and an axial load without the applied forces interfering with each other.