Xu Hao

Xu Hao

Xu Hao, born in Jiangyin, Jiangsu Province in March 1919, graduated from the Mechanical Department of southwest United University in 1943 and joined the Communist Party of China in 1979. He once served as director of mechanical department, director of Mechanical Engineering Research Institute and director of mechanical strength Research Office of Northeast Institute of technology.

Character experience

Professor Xu Hao's social part-time jobs include: member of the first and second engineering appraisal group of the academic degree committee of the State Council, vice chairman of the design branch of China Society of mechanical engineering, chairman of Liaoning society of mechanical engineering, director of the editorial board of mechanical design magazine, deputy editor in chief of mechanical strength magazine, honorary director of mechanical design and manufacturing magazine, Encyclopedia of China He is also the editor in chief of the basic theory of mechanical engineering.

Main contributions

Since the early 1950s, Professor Xu Hao has been devoting himself to changing from static strength design to dynamic strength design fatigue strength design. In 1956, it published the calculation of allowable stress in mechanical manufacturing, and in 1981, it published the safety factor and allowable stress, which solved the difficulties for conventional design. In the 1970s, in view of the shortcomings of conventional fatigue design abroad, the main parts of large hydraulic press, horizontal extrusion press and rolling mill in China were studied and analyzed, and the limiting conditions and reasonable design parameters in conventional fatigue design were put forward; the treatment method of surface coefficient under complex conditions; how to determine the asymmetric cyclicity coefficient and its variation law with stress concentration coefficient were put forward The first monograph of fatigue design in China, fatigue strength design, was published. In the early 1980s, his research direction changed from infinite life design to finite life design. The main achievements are as follows: the fatigue damage model and life calculation formula are proposed, which can reflect not only the effect of load sequence but also the influence of material cycle characteristics. This model is superior to the damage model commonly used in the world. The energy model of fatigue loss and the energy theory of fatigue life estimation have been established, which have been highly valued by scholars at home and abroad. A set of experimental device which can continuously measure the pH value of solution and metal electrode potential in the expanding crack has been developed, and a new corrosion fatigue crack growth formula has been put forward World leading level. In addition, the fatigue strength of welded structure, the mechanism of laser surface strengthening, the compiling criterion of load spectrum and the formation mechanism of Engineering short crack are also studied. Professor Xu Hao's scientific research achievements include: the research on the working load, stress and other parameters acquisition technology of large turbine blades in the national "sixth five year" scientific and technological research project, which passed the ministerial appraisal in December 1985, and the research on the basic problems of fatigue design in the national "Sixth five year" scientific and technological research project, which passed the ministerial appraisal in September 1985. The stress strength interference model often used in reliability design can not solve the problem Reliability design of airborne payload. In 1993, he put forward the concept of "miner's theorem interference model synthesis method" and the concept of "probability relative miner's theorem" for the first time, which solved the problem of reliability design under random load that has not been solved at home and abroad. In 1994, he published his monograph "probabilistic fatigue", and proposed a design system based on miner theorem interference model synthesis method. after more than 40 years of efforts, Professor Xu Hao has systematically studied an interdisciplinary subject of mechanics, materials science and mechanics, which has wide application value——

Fatigue strength

. His monographs "fatigue strength design", "fatigue strength" and "probabilistic fatigue" clarify the theory, engineering application and method of fatigue strength. A whole set of fatigue design theories and methods for fatigue finite life design and fatigue reliability design are put forward. the mechanical design manual (17 million words, written by 200 people) edited by him is a great work which runs through the whole field of mechanical design, mainly writing common contents of mechanical design, with modern design level and strong practicability, and is used by mechanical designers. The book was published in 1991 and has sold 100000 sets. It has a great influence in the mechanical industry and has made a contribution to promoting the modern design of mechanical engineering. In the field of mechanical design, Professor Xu Hao compiled 5 textbooks and 10 monographs for colleges and universities. He was awarded the title of excellent teacher by Liaoning Provincial People's Government in 1986, excellent scientific and technological worker by Liaoning Provincial People's Government in 1989, and the honorary certificate of "outstanding achievements in 40 years of scientific and technological work in Higher Education" issued by the State Education Commission in 1990. Since 1991, he has enjoyed the special allowance of the government for 199 years He became an honorary member of China Society of metals in one year.

Award winning record

Fatigue strength was published in 1988. The book was awarded the second prize of the fifth national excellent science and technology book in October 1990. In 1986, he won the second prize of science and technology progress award of China Machinery Committee. In 1985, he won the third prize of national science and technology progress award, and the second prize of science and technology progress award of machinery committee in the same year. "Research on design code for conventional fatigue strength of Francis Turbine Runner" was completed in December 1988 and won the first prize of science and technology progress award of China Machinery Committee in 1989.

Chinese PinYin : Xu Hao