Non-contact crack opening displacement measuring device and method for bending fracture test
The invention belongs to the field of material performance test, and especially relates to a non-contact crack opening displacement measuring device and method for a bending fracture test. The non-contact crack opening displacement measuring device comprises a mechanical experimental machine; a bend...
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Main Authors | , |
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Format | Patent |
Language | Chinese English |
Published |
27.08.2019
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Subjects | |
Online Access | Get full text |
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Summary: | The invention belongs to the field of material performance test, and especially relates to a non-contact crack opening displacement measuring device and method for a bending fracture test. The non-contact crack opening displacement measuring device comprises a mechanical experimental machine; a bending test tooling including an upper pressing head and two lower pressing heads, and a sample is clamped between the upper pressing head and the lower pressing heads; a digital image acquisition system including an industrial camera, an imaging lens, an annular LED illuminating light source arrangedat the front end of the imaging lens, a camera support system and a reflecting mirror, wherein the reflecting mirror is arranged at the lower part of the sample at an inclined angle of 45 degrees; thereflecting mirror reflects light generated by the light source to a fracture surface of the sample, and meanwhile, a surface image of the fractured sample is reflected into the imaging lens; and a control system for displayin |
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Bibliography: | Application Number: CN201910484112 |