Current：It is difficult to control the variables in analyzing and researching the threaded joint structure by experimental means, which inevitably results in dispersed and poorly repeatable test results
Due to the thread processing accuracy and surface roughness are difficult to control and other reasons, it is difficult to control the variables in analyzing and researching the threaded joint structure by experimental means, which inevitably results in dispersed and poorly repeatable test results, and it is difficult to reproduce the complex service scenarios. With the development of computer technology and calculation methods, scholars at home and abroad use precision finite element model to study the performance of threaded structure. The finite element method avoids the problems of difficult to control variables in the test and difficult to reproduce the service scene, which can clearly show the stress distribution of the threaded connection structure in the simulated working conditions, the evolution of the contact state of the complex interface, the attenuation of the fastening performance, and the weak points, which can strongly support the realization of intelligent design and intelligent manufacturing of the threaded fasteners.
Schematic diagram of precision finite element mesh for common metric bolt
A good finite element mesh of threaded parts should have the following characteristics: (1) the cell shape is simple and the cell characteristic equations are easy to solve; (2) the mesh model should be as accurate as possible with the same original definition domain; under the premise of guaranteeing the accuracy, the number of cells should be reduced as much as possible in order to ensure the solving efficiency. At present, although many scholars at home and abroad have solved the problem of difficulty in meshing of finite element model of threaded parts, they are unable to solve the problem of automation, and the research on the reduction of meshing workload is of great significance in the field of engineering.
Services
☆ Accurate finite element modeling of various bolts
☆ Accurate Finite Element Simulation of Various Connection Structures
☆ Finite element calculation of threaded joints with different fit accuracy
☆ Validation analysis of novel connection designs
☆ New Thread Profile Design (Research Project)
Service Advantages
The company has the only commercially available parametric generation software for accurate models of threaded components, which can efficiently obtain precision analysis models to assist engineers and technicians in the design and calibration of bolted joints. The researchers in the team have been focusing on accurate finite element simulation and analysis of bolts for many years, and have rich experience and knowledge in pre-processing of models and post-processing of calculation results. They have been engaged in scientific research activities for many years and have a high degree of fitness for research-oriented projects such as new thread development. New designs can be fully validated in the areas of fatigue, micro-motion wear, etc.
For the first time, the team has proposed a parametric accurate modeling method that can generate various new types of contours with the availability of contour parameters. Based on the summarization and condensation of all existing five-stage threads, such as metric threads, imperial threads, aerospace threads, pipe threads, etc., the three-dimensional contours of the threads are described using multiple parameters. By varying the parameters, an optimized design of the thread profile can be achieved.
Model Acquisition: For finite element practitioners, the biggest difficulty is how to quickly and easily obtain a precision finite element model for threaded parts. The boundary conditions of the precise model and how to process and analyze the calculation results are also one of the difficulties.
Contour design: Intelligent design is realized in the design of bolt structure, and "function-guided design" is realized. That is, in the high-precision industry, extreme working conditions, fastening, transmission, sealing threads can choose the most suitable, highest performance profile, greatly improving the performance of the upper limit of threaded fasteners. According to the working conditions, materials, surface treatment process, and not confined to the design manual stipulated 60 ° tooth angle thread, the choice of new thread profile bolts, to achieve agile manufacturing, flexible manufacturing.
