Moreover,the interfacial shearing strengths between PBO fiber and epoxy resin before and after the treatment were finally measured by the single-fiber pull-out test.

Single fibre pull-out test is one of the important ways to study the properties of fiber-reinforced composites’interface.

In this work,silane coupling agents were used for the surface treatment-of theKevlar-49 fibers,the interfacial strength was studied by means of single fiber pull-out tests.

Through a series of drawing experiments of brass wires, the effects of ultrasonic vibration on drawing force and surface quality of the wires were discussed.

In order to improve the load-bearing capacity and useful life of anchor cable,design new anchor cable anchorage,through static load drawing experiment of anchor cable,simulation the various situations may arise in application,regulation angle between the centerline anchor cable and the anchorage face,loading until destruction.