2. Deformation and destruction of thin aluminum and copper samples at quasistatic loading 2.1. The methodology of the experiments The experimental study on mechanical deformation and strength properties of aluminum (Al) and copper (Cu) condenser foils by h=0,015 mm thickness in solid (cold-worked [1]) condition is conducted at stretching of strips in the breaking machine Tinius Olsen H10KN (fig. 1) at a speed of movement of mobile grab of the breaking machine of 10 mm/min. Fig. 1. General view of the test machine: 1 - frame, 2 - PC 3 - moving cross-arm, 4 – machine`s grabs, 5 - sample clips, 6 – sample. Control of operation of the machine and data acquisition was carried out by the computer. Charts of stretching of samples were received: "effort - lengthening" and "stress – deformation". The test machine`s computer automatically chose scales of charts in the set size of speed of deformation, thickness and sample width, its working length. Start of movement of mobile grab (cross-arm) was carried out at not completely straightened condition of samples - foils, because of complexity of exact definition of the effort beginning in them. Therefore at charts there was an initial area (fig. 2, 3), having, generally small nonzero ordinates (efforts and stress), the achievements caused by process by samples of the straightened condition, and also operation (friction) of additional tiny hinged devices (clips) for samples mount. Further, when processing charts, this area excluded. 2.2. About a type of samples and their production In [2] requirements to aluminum foils for condensers, a view and sizes of samples (length of 150 mm, width of 15 mm) and conditions of mechanical (quasistatic) tests are provided. However, for an exception of influence of a large-scale factor by comparison of these quasistatic tests in comparison with dynamic experiments on the ring samples received by gluing together or the soldering of strips foils, in our case the sizes of samples – strips for quasistatic tests were accepted considerably the less size, namely: rather close with sizes of strips applied to rings. Preparations – strips for quasistatic tests of an aluminum foil were cut out 60 mm long and width b about 6 mm,
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