Механики XXI веку №15 2016

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Механики XXI веку. №15 2016 г.
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The original information in the software module is presented in the edit boxes that contain a defined
set of data selected according to the list of the composite.
In the upper part of the dialog there is the main menu that allows you add new materials, make
rational choice of material from the created database, keep the current status of the entered information,
create and trace reports about all parameters specific for composites. The main program provides the ability,
interactively to, add, edit, delete the original information about the physical and mechanical properties of
composites, the manufacturer, the cost, and the type of the composite material. In the main menu, if it is
necessary, there you can add new material as well, choose the composites and write its grade and marking in
the editor field, then keep the data loaded. In addition, the program includes the functions: write and edit
reports, print them; search the composite in the array of information about specified parameters and output
information on the program.
The variety of composites causes the problems associated with the informed decision making on the
rational choice base. In this regard, we have developed a method of comparative analysis [21 - 24], the
essence of which is to identify criteria that are significant for the production at the time of decision making
allowing analyzing, evaluating and identifying rational decision oriented on the users’ specified priority
parameters. Denote the performance using Pi, and the materials which, in accordance to the parameters,
equal values Oi, use them to form the adjacency matrix:
 



















nk n n n n
k
k
k
k
a a a a
a a a a
a a a a
a a a a
a
... O
... ... ... ... ... ...
... O
... O
... O
P ... P P P
С
3 2 1
3 33 32 31 3
2 23 22 21 2
1 13 12 11 1
3 2 1
nk
The elements of the matrix take quantitative direct or
the inverse (depending on the more or less priority val-
ues), the coded values used to assess and compare mate-
rials.
Then, using the adjacency matrix one can calculate the iterated importance 


n
j
nk i a Q
1
and weight
criterion coefficient




 n
i
i
i
i
Q
Q q
1
. The results of the calculation of weight coefficient of criteria reduce the re-
sulting vector













n q
q
q
nq
...
)( 2
1
, where « n » is the number of the examined objects, the and just highest value will
determine the rational material.
To automate the process of the rational choice of the composite based on its properties and
parameters the second software module is being developed and, in fact, it will be the application to the first
module described above. Data to make calculation are taken from the first module of the database of
composites.
The developed software module to create the composites database allows to move from manual
composites information processing to automated one owing to the systematic data. Due to the automation
significantly increases efficiency: production preparation of products of composites; storage and processing
of information based on the types, properties and composites indices; decision making on the choice of
rational composite, in a software product.
References:
1. Дж. Любин. Справочник по композиционным материалам: в 2-х кн. / Пер. с англ. А.Б. Геллера,
М.М. Гельмонта; под ред. Б.Э. Геллера.- М:. Машиностроение, 1988 – 1032 с., ил.
2. Skeeba . Actual Problems and Decisions in Machine Building. – Pfaffikon: Trans Tech Publ. –
2015. – 344 p. – (Applied mechanics and materials; vol. 788). – doi: 10.4028 – ISBN
978-3-03835-551-9.