Test Machine Forum Explores Industry Frontiers

On May 16, the second China Test Machine Technology Forum was successfully held at the China International Exhibition Center. The forum focused on the latest technological advancements in testing machines and the most cutting-edge applications of testing machine technology. Specially invited senior users of 3 testing machines and manufacturer representatives made wonderful reports. Experts, users and manufacturer representatives from nearly 40 testing machine industries participated in the report. Meeting.

Prof. Bao Yiwang from China Construction Materials Research Institute Report Title: Evaluation of Mechanical Properties under Ultra-High Temperature Extreme Environment Bao Yiwang, General Research Institute of Building Materials Science and Technology of China, introduced that many material components in the aerospace field work at hypersonic flow and super Under extreme conditions such as high-temperature oxidation and high- and low-temperature corrosion, it is difficult to evaluate the performance of material components under these conditions.

At the same time, Bao Yiwang pointed out that the evaluation of ultra-high temperature mechanical properties is the key to the success or failure of aerospace vehicles. At present, there are two problems in the evaluation of the performance of material components in extreme domestic environments: First, there is no scientific test device, which is manifested in the lack of service. On-line test data, test fixture can not withstand extreme environments, sample support and loading is very difficult; Second, there is no test method standards, specifically to the current technology and standards can not meet the extreme environmental applications, the lack of material component performance evaluation characterization method, the lack of materials / Component failure mechanism evaluation criteria.

Finally, Bao Yiwang concluded that the key to solving the evaluation of mechanical properties under ultra-high temperature extreme conditions is the use of modular modular test equipment, non-contact displacement measurement and translocation loading, and coupling between oxidation, high temperature and corrosion. Protect the fixture in an environment.

Professor Wang Xishu, Professor of Department of Engineering Mechanics, School of Aerospace, Tsinghua University Topic: Test and evaluation of the effect of humidity on the fatigue strength of materials Wang Xishu, professor of engineering mechanics at the School of Aeronautics and Astronautics at Tsinghua University, introduced that the engineering fields of fatigue research are mainly high-speed and urban. Transportation vehicles, ordinary cars, aviation airplanes, microelectronics, large-scale water conservancy, wind power generation, etc. Fatigue tests in these fields have their own characteristics. For example, structural fatigue tests for ordinary cars require control linkage, proportional loading or non-proportional loading according to the situation. , In addition, the loading type must be changed according to different road conditions.

The report also pointed out that the environment with a relative humidity of more than 60% can not ignore the effect of high-cycle (3105) fatigue strength of aluminum alloy materials, while the ceramic coating prepared by micro-arc oxidation + sealing process can effectively enhance the fatigue strength of aluminum alloys. Reduce the effect of humidity on it. In addition, Wang Xishu emphasized that fatigue causes the failure of the engineering structure and the occurrence of fracture accidents. The mechanism of failure of aluminum alloy fatigue strength due to the decrease of relative humidity needs further study. The research team still needs scientific researchers and engineering technicians and testing machine manufacturers to jointly Work hard.

Jiang Shengjie, Technical Director of Dandong Aolong Rays Instrument Group Co., Ltd. Report Title: Development Trend of Industrial X-rays Jiang Shengjie, technical director of Dandong Aolong Ray Instrument Group Co., Ltd., said that currently, conventional X-ray inspection machines mainly include X-ray flaw detectors. Frequency-fixed X-ray diffractometers, X-ray imaging diffraction systems, on-line inspection systems, etc. Among them, portable X-ray flaw detectors are mainly used in the field. In addition, from the perspective of the development of portable X-ray flaw detectors, vertical frequency, horizontal frequency, high frequency fixed, digital imaging portable, industrial CT is the current research hotspot.

Beijing University of Technology School of Mechatronics Shangde Guang Report Title: High-Temperature Multi-Axis Multi-Axis Fatigue Strength Assessment and Life Prediction Research Under Complex Loads Sun Deguang, School of Mechanical and Electrical Engineering, Beijing University of Technology, pointed out that major equipment life-safety service technologies have been included in the national In the long-term science and technology development plan, fatigue testing of major equipment has always been a research hotspot. There will be many fatigue test designs in engineering design, but there are still some deficiencies in some aspects. The current problems to be solved are the structural details anti-fatigue design, the life cycle of major mechanical equipment structures, and the life loss of critical structural components and components under high-temperature service environment. Monitoring and service life extension of major equipment structures.