Two-way stress creep testing machine for mechanical connection

Abstract

The invention discloses a two-way stress creep testing machine for mechanical connection. The two-way stress creep testing machine comprises a supporting vertical frame and a test piece as well as a transverse loading system and an axial loading system both dependent on the supporting vertical frame and the test piece, wherein the test piece comprises an upper base face formed by fixing an upper stainless steel plate and an upper glass base plate, and a lower base face formed by fixing a lower glass base plate and a lower stainless steel plate; the upper glass base plate and the lower glass base plate are directly adhered together by sealing gum; a hanging ring is fixed at the center of the front surface of the lower stainless steel plate, and one end of the lower stainless steel plate is provided with a hole. The two-way stress creep testing machine cannot generate other additional forces influencing movement of the sealing gum when the transverse loading system and the axial loading system bear loads, thus representing the actually existing stress form accurately. Loads are all loaded by virtue of gravity, and within long testing time, loading cannot be affected by external factors, such as power supply and equipment mechanical failure, so that the direction and accuracy of stress can be kept uninterruptedly and lastingly.

Description

technical field [0001] The invention belongs to a test device, in particular to a two-way force creep test machine. Background technique [0002] The structural glue used in the glass curtain wall will bear the wind load perpendicular to the bearing surface while bearing the gravity for a long time (produces long-term shear creep), so it is necessary to provide a creep test device with two-way force, To simulate the actual two-way force state of the sealant. [0003] Using the creep device in the patent CN201653826U, the four corners of the upper and lower pieces of the test piece are fixed by pulling claws, which will generate additional forces other than the specified force, which will affect the correct stress state of the sealant. For example, when there is no load in the vertical direction, the force applied in the horizontal direction will cause the sealant to deform, resulting in the movement of molecular segments to offset the force in the horizontal direction and a...

AI Technical Summary

Problems solved by technology

However, in such a long period of time, there will be various problems in the power consumption system and the equipment itself, such as power failure or equipment shutdown resulting in static phenomena, resulting in unsustainable or inability to change the force. If the load is reapplied, there must be incomplete displacement recovery ( There is a certain permanent deformation), and the phenomenon of repeated stretching again affects the accuracy of creep measurement

Images