Sample median plane

Hence, the adduced above results have shown that polyethylenes samples fracture criterion in tests on cracking under stress in active mediums is polar liquid reaching of sample median plane. The stability to cracking is described correctly within the frameworks of fractal model of transport in polymers. The stability to cracking extreme growth cause is structural changes, which are due to high-disperse mixture Fe/FeO introduction and characterized by dimension D. ... 

Figure 13.21. Cross section TEM (XTEM). The sample is usually prepared as a sandwich, and a thin section is cut to be normal to the median plane. This geometry allows us to see how features change as we move from...

For theoretical prediction of the value characterizing stability to cracking, two main assumptions were made [19]. Firstly, it has been supposed, that samples fracture occurs then, when active medium in diffusion process reaches their median plane. This assumption is based on the analysis of cracking under stress process [17]. Then the theoretical value Tjq is given by the main equation of stationary diffusion [23] ... 

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