The Analysis of the Current Situation and Development Prospect of Bolt Pretension

摘要

In order to guide the practice better with the study of pretightening force, this paper ansysed the preload theory research situation and application situation. Put forward the problems in the development of the existing pretightening force theory, it also analyzed the application status and development direction of torque wrench, and summarized the development needs and development direction of pretightening force theory. Preload data by using tensile test obtains each specification bolts, curve fitting using MATLAB software, the correlation function to find the bolt preload and specifications.