Method for testing interfacial shear strength of marine clad steel plate

Abstract

The invention discloses a method for testing interfacial shear strength of a marine clad steel plate, which uses a separated Hopkinson pressure lever for testing, and the dynamic test method mainly comprises the following steps: designing a sample, a loading piece and a clamping piece, respectively connecting the loading piece and the clamping piece with an incident rod and a transmission rod of the separated Hopkinson pressure lever by threads, and placing the sample in a sample loading block; adjusting the punch to be coaxial with the composite layer of the sample, erecting a high-speed camera system, and taking the punch as an observation area; starting a loading system of the separated Hopkinson pressure rod to carry out a test, and recording strain information through strain gauges adhered to the incident rod and the transmission rod to calculate the dynamic shear strain rate and the dynamic shear strength at the interface. By the adoption of the dynamic test method, effective dynamic loads can be applied to the clad steel plate, the interface shear strength value can be calculated, and necessary technical guarantee is provided for effective testing of the interface performance of the clad steel plate.

Description

technical field [0001] The invention relates to the technical field of testing the fracture resistance of metal materials, in particular to a method for testing the interface shear strength of a composite steel plate for ships. Background technique [0002] Polar regions have extremely rich natural resources, which play an important supporting role in the sustainable development of the world's future economic society. According to an assessment report published by the US Geological Survey, the Arctic holds 13% of the world's undiscovered oil reserves, 30% of the world's undeveloped natural gas reserves and 9% of the world's coal resources. As the global climate warms and sea ice melts in large quantities, the rich resources in the polar regions and the extremely valuable Arctic shipping lanes will greatly enhance the strategic position of the polar regions. Since most of the developed countries in the world are located north of 30° north latitude, where 80% of the world's i...

AI Technical Summary

Problems solved by technology

In the test, the bullet 2 is driven by the air gun 1 to hit the incident rod 3, and the sample compressed by the incident rod 3 undergoes high-speed deformation, and the strain gauge 4 is pasted on the incident rod 3 and the transmission rod 5 to record the strain information of the test process, which can be calculated according to the relevant formula The dynamic strength of the sample is obtained. At present, this method is mainly used to test the dynamic tensile and compressive strength of the material. There is still no effective measurement method for the interface shear strength of the composite steel plate.

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