Data processing method for prediction of multilevel threshold force caused by composite impact

A technology of layered threshold and composite materials, which is applied in the direction of testing the strength of materials using a single impact force, can solve the problems of low prediction accuracy, and achieve the effect of solving the problem of low accuracy.
CN103344512AInactive Publication Date: 2013-10-09JINGDEZHEN CHANGHE AVIATION EQUIPMEMT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JINGDEZHEN CHANGHE AVIATION EQUIPMEMT TECH CO LTD
Publication Date
2013-10-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a data processing method for the prediction of a multilevel threshold force caused by composite impact, which comprises the following steps: 1) carrying out an impact experiment on the composite laminated board serving as a reference experiment component so as to obtain a multilevel threshold force of the composite laminated board, wherein the thickness of the composite laminated board is regarded as an infinite thickness; and 2) calculating multilevel threshold forces of laminated boards which are different in thickness and belongs to a same material system under the action of impact heads with different radiuses by using the obtained multilevel threshold force. Compared with the prior art, according to the invention, the influence of the deflection of plate on the contact radius is considered in data processing, and therefore, the method has an advantage of high prediction precision.
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Description

technical field

[0001] The invention relates to a performance measurement technology of a composite material, in particular to a data processing method for predicting the impact delamination threshold force of a composite material. Background technique

[0002] Composite laminates are widely used in aeronautical structures, but they are very sensitive to impact loads, and are very easy to delaminate and damage, resulting in a sharp drop in the compressive strength of the material, thereby greatly reducing the bearing capacity of the structure. In aeronautical structural engineering, sometimes it is necessary to predict layer threshold force. Davies, etc. [1] The delamination threshold force model was established based on the type II interlaminar strain energy release rate of composite materials. Sutherland et al. [2] and Yang [3] et al. predict the delamination threshold force using the relationship between hoop shear stress and interlaminar shear strength. However, the...

Claims

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