The new technology can find the crack position in advance
researchers first put the porous polyethylene samples developed by National Research University of technology with a micromechanical testing machine into the vacuum cavity of scanning electron microscope. Through special software hundreds of photos can be obtained from the process; then the detailed images of material micro strain distribution are further established by using digital image method. These images reflect the change of stress concentration in different regions of the material. Through the analysis of the images the researchers found that the deformation of the material in the compression process did not occur uniformly but gradually exped spread to the material film strips. Alexei salimon associate professor of Physical Chemistry Department of Russian National Research University of technology said that through the test of polyethylene real-time images of deformation can be established in the complex porous material loading process the analysis of these micro deformation can determine the deformation concentration area during sample testing product use. Previously this narrow area was only a theoretical hypothesis. He also pointed out that UHMWPE porous materials are widely used in the medical field such as replacing bone cartilage fragments being used as cell matrix in cell technology. The above methods are simple universal can be rapidly extended to laboratories equipped with high-resolution digital imaging equipment.
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