TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Structural model of heterogeneous material (microsphere foam) straining and failure under hydrostatic loading



Full text article ( in russian)

Year

 
2021

Issue

 
396

Volume

 
2

Pages

 
37-51

Caption

 
Structural model of heterogeneous material (microsphere foam) straining and failure under hydrostatic loading

Authors

 
Fedonyuk N., Dodonov P

Keywords

 
syntactic foam, microspheres, matrix, heterogeneous structure, homonization, hydrostatic strength, buoyancy.

DOI

 
10.24937/2542-2324-2021-2-396-37-51

Summary

 
Object and purpose of research. The paper investigates polymeric composite material of syntactic foams type being by nature a heterogeneous medium and consisting of polymeric matrix, filled with spherical inclusions: microspheres. main purpose of this this paper is to develop a structural model of straining and failure for this type of materials under hydrostatic pressure and software and mathematical apparatus for model implementation.The
Subject matter and methods.The input data for this research were composition and structure of syntactic foam material as well as the performance of its components (polymeric matrix and glass microspheres). Structural model was developed on the basis of solutions to linear elasticity theory problems using Lubachevsky – Stillinger algorithm for the formation of structure, homonization methods, etc. A calculation algorithm implemented in code in the С++ language was developed on the basis of the designed mathematical apparatus. Verification of calculation results was carried out by comparison with failure test results of samples of one of the grades of syntactic foam under short-term hydrostatic pressure loading.
Main results. Structural model of syntactic foam type material straining and failure under hydrostatic pressure was developed. A calculation algorithm implemented in program code written in the С++ language which is relatively highly efficient for analysis of real structures with a large number of microspheres of the order of 105. Correlation with experimental results showed compatibility of modelling results in terms of both quantitative and qualitative estimates.
Conclusion. The developed structural model allows with a high degree of confidence to describe the processes of damage and failure accumulation in syntactic foam under hydrostatic pressure. For practical purposes the model can be used applied for prediction of syntactic foam performance (strength, bulk strain and buoyancy), based on the properties of the initial components – microspheres and polymeric matrix.

Rubrics

 
Naval architecture

Back to the list



 





 
Login:
Password:
Register
Forgot your password?


Last issues

All rights reserved © Krylov state research centre, 2017 — 2021


ISSN (print) 2542-2324 / ISSN (online) 2618-8244

Address: Moskovskoye shosse, 44, Saint-Petersburg, 196158

Phone: +7(812) 415-49-80