A method of offset load testing a tubular composite specimen with two pairs of aligned holes and having at least one defect, the method comprising: providing a testing apparatus having a pair of arms including a fixed arm and a mobile arm; securing the pair of arms using a fastener assembly in each of the two pairs of aligned holes; and moving the mobile arm to impart an offset load force to the tubular specimen. One aspect includes a method of offset load testing comprising: providing a testing apparatus having a pair of arms including a fixed arm and a mobile arm; providing a tubular composite specimen with a top portion and a bottom portion; securing the pair of arms to the top and bottom portions of the tubular composite specimen; and moving the mobile arm to impart an offset load force to the tubular composite specimen.

A method of offset load testing a tubular composite specimen with two pairs of aligned holes and having at least one defect, the method comprising: providing a testing apparatus having a pair of arms including a fixed arm and a mobile arm; securing the pair of arms using a fastener assembly in each of the two pairs of aligned holes; and moving the mobile arm to impart an offset load force to the tubular specimen. One aspect includes a method of offset load testing comprising: providing a testing apparatus having a pair of arms including a fixed arm and a mobile arm; providing a tubular composite specimen with a top portion and a bottom portion; securing the pair of arms to the top and bottom portions of the tubular composite specimen; and moving the mobile arm to impart an offset load force to the tubular composite specimen.

A weld coupon destructive test device includes a support base. A plunger connected to the support base and movable between a first position and a second position along a length of the support base. A handle to operate the plunger between the first position and the second position. A header on the support base, the header configured to press a weld coupon between the header and the plunger, the header having a first support end and a second support end, the header having a depression formed between the first support end and the second support end. The weld coupon rests between the first support end and the second support end of the header, and the weld coupon is pressed into the depression formed between the first support end and the second support end of the header.

A weld coupon destructive test device includes a support base. A plunger connected to the support base and movable between a first position and a second position along a length of the support base. A handle to operate the plunger between the first position and the second position. A header on the support base, the header configured to press a weld coupon between the header and the plunger, the header having a first support end and a second support end, the header having a depression formed between the first support end and the second support end. The weld coupon rests between the first support end and the second support end of the header, and the weld coupon is pressed into the depression formed between the first support end and the second support end of the header.

A device is for detecting compaction and shear strength characteristics of an asphalt mixture during construction compaction. The device includes a fixed frame and a detection system. The detection system includes a display, a control panel, a test claw, an electric motor, a lift switch, a torque sensor and a temperature sensor. The control panel includes a power switch for controlling the electric motor and a speed regulator for controlling a rotation speed of the test claw. An output end of the electric motor is connected to an input end of the torque sensor, and an output end of the torque sensor is connected to an input end of the test claw. An output end of the test claw is provided with a claw-shaped blade. The claw-shaped blade is provided therein with the temperature sensor.

A performance evaluation method for elastic material including rubber or elastomer, the method includes a step of applying a strain to a test piece made of the elastic material to form at least one void inside the test piece, a step of obtaining projected images of the test piece by irradiating the test piece with X-rays at a plurality of times after the at least one void is formed, and a step of obtaining a volume change of the at least one void between the plurality of times based on the projected images, as one of indexes of performance.

Safety systems and material testing systems including safety systems are disclosed. An example material testing system includes: an actuator configured to control an operator-accessible component of the material testing system; an actuator disabling circuit configured to disable the actuator; and one or more processors configured to: control the actuator based on a material testing process; monitor a plurality of inputs associated with operation of the material testing system; determine, based on the plurality of inputs and the material testing process, a state of the material testing system from a plurality of predetermined states, the predetermined states comprising one or more unrestricted states and one or more restricted states; and control the actuator disabling circuit based on the determined state.

In a device for evaluating torsional structural performance of girder according to an embodiment of the present disclosure, a guide unit of a support member formed in a shape of an arc having its center that matches a shear center of the girder rotatably supports a rotating member, so that the shear center of the girder matches a center of torsion during clockwise or counterclockwise rotation of the rotating member, thereby measuring an accurate angle of twist and preventing an incident in which the rotating member escapes due to separation of a component by a rotational force.

Provided is a repeated moment generation device that includes: a principal shaft; principal bearing members; lever members; principal eccentric weight rotors; auxiliary eccentric weight rotors; and drive means (such as a motor) for causing the principal eccentric weight rotors and the auxiliary eccentric weight rotors to synchronously rotate. Eccentricity directions of the principal eccentric weight rotors are different from each other by 180 degrees around shaft centers of shaft bodies thereof, eccentricity directions of the auxiliary eccentric weight rotors are different from each other by 180 degrees around shaft centers of shaft bodies thereof, and the eccentricity direction of the principal eccentric weight rotor and the eccentricity direction of the auxiliary weight rotor located on the same side as the principal eccentric weight rotor with respect to the principal shaft 1 are different from each other by 180 degrees around the shaft centers of the shaft bodies thereof.

Provided is a repetitive moment generating device that can be used for a fatigue testing machine and allows for a change in an amplitude of a repetitive moment to be imparted on a test piece even during rotation of an eccentric weight. A repetitive moment generating device includes: eccentric weight members provided at shaft bodies in a state where the eccentric weight members intersect the rotatably held shaft bodies and in a state where the eccentric weight members are slidable in a direction that intersects the shaft bodies; sliders that are attached to the shaft bodies in a state where the sliders are slidable in a direction of shaft centers of the shaft bodies and in a state where the shaft bodies are able to idle; link mechanisms that convert sliding motion of the sliders in the directions of the shaft centers into sliding motion in a direction that intersects the shaft bodies and transmit the sliding motion to the eccentric weight members; handle that are operation means for causing the sliders to slide in the directions of the shaft centers of the shaft bodies; and the like.