CABR Foundation Engineering Develops Low-Carbon Material Stress Relaxation Testing Equipment

In the past two years, relying on a self-funded research project of CABR Foundation Engineering Co., Ltd., the Foundation Laboratory of the State Key Laboratory of Building Safety and Environment has completed the development of the relevant testing equipment, the "Low-Carbon Material Stress Relaxation Testing Machine."

The project needed to study the issue of "stress relaxation of bamboo under longitudinal tensile loading." Given that there is currently no testing machine in China for studying the stress relaxation characteristics of bamboo, the research group's graduate student Guo Jingyi, relying on the research conditions of the Foundation Laboratory and under the guidance of the supervisor and with the cooperation of laboratory staff, independently developed, designed, and manufactured a "stress relaxation testing machine." The machine has a support system in the middle, with a power module and a communication module at the two ends. The measurement and control program was written in Python 3, and communication between the host computer and the various sensors and controllers is achieved in the form of the "RS485 serial communication standard + Modbus message transmission protocol."

At the current stage, the testing machine is mainly used to determine the isothermal stress relaxation performance of bamboo. It can also be used to study the stress relaxation of fiber-reinforced polymer (FRP) bars, and its functions can be flexibly expanded according to research needs.

At present, the testing machine has passed all tests and will soon be put into use for the project research work.