PNIPU: Software module for improving the prediction of material behavior

Main article: CAD Computer-aided design systems

2022: Solution Presentation

The program of scientists of the Perm Polytechnic will improve the quality of large parts of aircraft and machines. The university announced this on July 27, 2022.

Polymeric composite materials with improved characteristics are used in aviation and subsoil mechanical engineering construction use. Using the winding method, you can create large high-strength parts and shell products. But it is not always possible to accurately predict the behavior of such structures when used, and conducting experiments requires high costs. Perm Polytech scientists have created a software module that will improve the prediction of material behavior and prevent defects.

Scientists published the results of the work in an article. The study was implemented with the financial support of the RFBR and the Perm Territory. The development in the future may become part of the domestic digital twin of composite shells, which will take into account the complex nonlinear behavior of materials. This will allow you not to use foreign software. With the help of winding, high-strength reinforced products are created. Most often they are produced on the basis of epoxy or polyester resins and polymers of vinyl esters. The future shell is wound on a special blank of the same shape and size as the surface of the future product. It must withstand impact and temperature differences. For the production of large products, blanks from sand-polymer mixtures or low-melting materials are used, which are then destroyed.

The production volume of composite products is growing, so it is important to improve the accuracy of predicting the strength of these structures. We have created a universal calculation module that determines the effective characteristics of materials depending on technological parameters. It allows you to track the key stages of product creation and identify defects, "said Laysan Sakhabutdinova, one of the developers, senior lecturer at the Department of Computational Mathematics, Mechanics and Biomechanics of the Perm Polytechnic.

To do this, scientists modeled the main stages of parts production. They developed a physical model to simulate the behavior of materials based on the Ansys Mechanical APDL package.

Parts are manufactured from 10 to 15 days at sufficiently high temperatures. Therefore, it is important to consider the workpiece and shell material processes that occur during winding. Experimental methods require high costs and do not allow to identify all characteristics of materials. Models and methods popular among engineers are not accurate enough. With the help of new numerical models, it is possible to determine how production factors affect the deformation and destruction of structures, - explained the scientific director of the working group, associate professor of the Department of Computational Mathematics, Mechanics and Biomechanics of the Perm Polytechnic, Doctor of Technical Sciences Oleg Smetannikov.

The development of researchers from the Perm Polytechnic will help bring to a new level the design of high-strength products from composites.