Anti-destabilization universal clamp used for compression performance test of edge/central notch composite material laminated plate

Abstract

The invention discloses an anti-destabilization universal clamp used for compression performance test of an edge / central notch composite material laminated plate. The anti-destabilization universal clamp consists of a dog bone shaped metal clamping plate, PA6 nylon sandwiches, butterfly nuts and bolts, an opening reinforcing accessory and the like, wherein the dog bone shaped metal clamping plate comprises an edge opening and a central opening, wherein a connecting relationship is as follows: the PA6 nylon sandwiches are arranged on the upper and lower surfaces of the laminated plate, the dog bone shaped clamping plate is arranged on the surface of the upper nylon sandwich and the surface of the lower nylon sandwich; 8 pairs of butterfly nuts and bolts are used for fastening the dog bone shaped clamping plate; the nylon sandwiches and the laminated plate are clamped; and a semi-cylindrical convex table of the opening reinforcing accessory is inserted into an opening of the clamping plate, and is fixedly arranged on the metal clamping plate through a butterfly bolt and a threaded hole. According to the anti-destabilization universal clamp disclosed by the invention, sub parts are exquisitely matched and connected, so that the anti-destabilization universal clamp is simple, convenient, practical and delicate, effectively prevents an edge / central notch composite material from generating bending and destabilization as well as friction between the clamp and a test sample, can test crack initiation and expansion at an edge / central notch in real time, and provides technical means for testing compression performance of the laminated plate.

Description

Technical field [0001] The invention provides an anti-instability universal fixture for the compression performance test of an edge / center gap composite material laminate, which belongs to the technical field of test and test. Background technique [0002] In the compression performance test of the composite material laminate, the laminate often suffers from bending instability, which affects the normal progress of the test and causes the test results to be distorted. Therefore, in order to prevent the composite material laminate from instability during the compression performance test, it is necessary to install an anti-instability fixture experimenting. At present, the anti-instability fixtures for composite laminates at home and abroad are only used for a single notched specimen. Different notched specimens often require different fixtures. Poor fixture versatility leads to excessive test fixtures and waste, and low utilization. For this reason, Invented a general-purpose fix...

AI Technical Summary

Problems solved by technology

[0002] In the compression performance test of composite laminates, the laminates often suffer from bending instability, which affects the normal progress of the test and results in distortion of the test results. Therefore, in order to prevent the instability of the composite laminates during the compression performance test, it is necessary to install an anti-instability fixture experimenting

At present, the anti-instability fixtures for composite laminates at home and abroad are only used for a single notch sample. Different notch samples often require different fixtures. The poor versatility of the fixtures leads to too many test fixtures and waste, and the utilization rate is low. For this reason, Invented an anti-instability universal fixture for testing the compressive properties of edge / center notched composite laminates, consisting of a dog-bone splint with edge openings and center openings, PA6 nylon interlayer, wing nuts and bolts, and opening reinforcement accessories and other components, which can prevent the bending instability of the edge / central notch composite material easily, practically, accurately and efficiently, as well as the friction between the fixture and the sample, and can observe the crack initiation and propagation at the edge / central notch of the sample in real time , to provide technical means for laminate compression performance testing

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