TOMSK, Jan 6 –
RIA Tomsk. Scientists of the Faculty of
Physics and Engineering of Tomsk State University found out how various holes
in titanium alloys reduce their strength under a sharp load, the university’s
press service reports; it is specified that results of experiments will help to
avoid accidents, for example, when an aircraft landing or operating space
According to the
press service, scientists of the TSU Laboratory for Properties of Substances in
Extreme States under the leadership of Professor Vladimir Skrypnyak conduct
experiments on key brands of titanium alloys, for example, Ti-Nb. These alloys
have high corrosion resistance, therefore, they are suitable for the
construction of space and aviation equipment, as well as for shipbuilding.
citing TSU scientists, said that when designing various structures, certain
indicators, for example, strength, are laid in the calculation. These numbers
are taken from reference books, but the bulk of these characteristics are
obtained under conditions of slow loading.
is a sharp blow – the landing gear before landing, the impact of ice on the
hull, various vibrations, you cannot use these indicators, you will get a
forecast that will lead to an accident, destruction and disaster. (Therefore)
we look how much the conditions of high-speed loading affect the
characteristics that are laid down in the strength calculations during
design", – Skripnyak is quoted.
physicists focused on damage to materials in which stress concentrators are
present – these are various holes, tucks, cuts. Experiments have shown that in
this case, with sharp shocks, the ultimate degrees of deformation decrease by
more than 10 times. That is, in the presence of various kinds of holes in parts
made of titanium alloys, the ability to experience loads sharply decreases.
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to prevent accidents that occur during dynamic loads, when designing, strength
indicators are taken with a margin, they are increased by 5-6 times. But in
fact, you need to increase it by 10. In a place where there is a hub, you can
constructively increase the thickness and reduce the stress, and you do not
need to increase the entire structure as a whole, where there is no this
hub", – Skripnyak explained.
about the results of their experiments at the international conference
"Deformation and destruction of materials and nanomaterials", where
more than 500 reports from participants from 16 countries were presented.
Representatives of companies involved in the construction, development of new
technology for the Arctic and new technologies in the energy sector spoke to
materials scientists – Oxford Instruments, INSTRON, Reicherter, LIMMESS and