Failure prediction method and device for multi-row screw joint structure of composite material cylinder

Abstract

The invention provides a failure prediction method and device for a multi-row screw joint structure of a composite material cylinder. The technical problem that an existing simulation technology is poor in pertinence is solved. The method comprises the following steps: establishing a three-dimensional solid model of a composite material cylinder structure; establishing a global finite element model of the three-dimensional solid model to form a global simulation process and a global simulation result; establishing a multi-row bolt connection structure finite element model of the three-dimensional solid model; and limiting a multi-row bolted connection simulation process by utilizing the global simulation result to form a multi-row bolted connection simulation result. The failure predictionaccuracy of the composite material cylinder multi-row bolt connection structure is improved, and a stress/strain fine analysis means is provided for optimization design of the composite material cylinder multi-row bolt connection structure. The overall limit boundary of multi-row bolt connection structure simulation is established through the overall simulation result, the fine grids and the small-particle entity units of multi-row bolt connection simulation are used for forming the fine simulation process, and the simulation efficiency and the high accuracy of the simulation result are effectively balanced.

Description

technical field [0001] The invention relates to the field of simulation technology, in particular to a failure prediction method and device for a multi-row screw connection structure of a composite material cylinder. Background technique [0002] Composite materials are widely used in aerospace field. The multi-row screw connection formed in the tubular structure formed by composite materials is a necessary structural design to meet the requirements of design, process, cost and maintenance. [0003] The loading and failure forms of the multi-row screw joint structure of composite material cylinder are complex, and there are many contact surfaces and large meshes in the simulation modeling process. At present, traditional failure prediction simulation methods have problems such as heavy modeling workload, difficult simulation convergence, and poor calculation accuracy, so they cannot be directly used. Contents of the invention [0004] In view of the above problems, an em...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the embodiment of the present invention provides a failure prediction method and device for a multi-row scr

Images