Simulation method of delamination defects by edge pulse reflection method for composite material laminate machine

Abstract

The invention relates to the material field, and provides a method for hierarchically simulating defects of a machined hole edge of a composite laminated board through an impulse reflection process. The method comprises steps of selecting a material, a form and a cured technological parameter molded composite laminated board similar to the piece to be detected as a reference block, machining through holes of various bore diameters on the reference block, respectively drilling stepped holes requiring to detect layering sizes on the upper, middle and lower through holes of different depths, and detecting an ultrasonic hole edge layering detection instrument with the reference block with the stepped holes. The hole edge of the reference block prepared by the method has accurate layering size, and the method is simple to operate, has strong operability, can provide standard for sensitivity adjustment of the ultrasonic hole edge layering detection, provides possibility for quantitative analysis of layering size, and also provides material conditions for verifying the detectability of the hole edge layering size and selecting detection methods.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for simulating delamination defects by a composite material laminate machine plus hole edge pulse reflection method. Background technique [0002] At present, when the edge of the hole added to the composite material laminate machine is required to be inspected for delamination defects, the inspectors usually can only use conventional visual observation methods, sometimes with a magnifying glass or a flashlight to visually observe to determine whether there is a white area or whether there is a white area on the edge of the hole. The burrs are used as the basis for judging, and it is impossible to judge whether the size of the edge delamination of the machined holes exceeds the design requirements. Ultrasonic is an effective technical means to detect delamination defects in composite laminates, but there is currently no good simulation method for delamination defects at the edge...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose a composite material laminate machine plus hole edge pulse reflection method delamination defect simulation method to accurately control the boundary size of the hole edge delamination, so as to solve the problem that there is no hole edge delamination comparison in the current ultrasonic testing Status of test block

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