 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12977 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8096
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| In English (Mech. Solids): | | 4881 |
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| O.A. Staroverov, V.E. Wildemann, A.I. Mugatarov, E.M. Strungar, and E.A. Chebotareva, "Critical States of Laminated Polymer Composite under Quasi-Static Deformation after Preliminary Low-Velocity Impact Loads," Mech. Solids. 59 (5), 3244-3253 (2024) |
| Year |
2024 |
Volume |
59 |
Number |
5 |
Pages |
3244-3253 |
| DOI |
10.1134/S0025654424606116 |
| Title |
Critical States of Laminated Polymer Composite under Quasi-Static Deformation after Preliminary Low-Velocity Impact Loads |
| Author(s) |
O.A. Staroverov (Perm National Research Polytechnic University, Perm, 614000 Russia, oastaroverov@pstu.ru)
V.E. Wildemann (Perm National Research Polytechnic University, Perm, 614000 Russia)
A.I. Mugatarov (Perm National Research Polytechnic University, Perm, 614000 Russia)
E.M. Strungar (Perm National Research Polytechnic University, Perm, 614000 Russia)
E.A. Chebotareva (Perm National Research Polytechnic University, Perm, 614000 Russia) |
| Abstract |
The study results of the influence of preliminary localized impacts of different intensity on
the mechanical behavior of laminated polymer composite with the use of modern testing and diagnostic equipment is presented in this paper. Drop-weight three-point bending tests followed by quasistatic tension were carried out. The data of change in residual strength and deformation characteristics
of the studied composite were obtained. The nonlinear dependence of residual strength and stiffness
on the energy of preliminary impacts was noted. On the basis of the previously developed approach
that is based on the analysis of fatigue sensitivity diagrams, impact sensitivity diagrams were plotted
and threshold values of dynamic impact energy, corresponding to the transition to critical states, were
determined. Deformation and fracture processes during quasi-static tension of damaged fiber-rein-forced plastic (FRP) specimens were analyzed on the basis of data, obtained by the VIC-3D video system. Using the method of digital images correlation (DIC), stress-strain curves of damaged specimens
were plotted. The evolution of inhomogeneous longitudinal strain fields on the FRP’s surface is presented. The processes of damage accumulation and fracture of FRP specimens during quasi-static tension were analyzed, based on the data of acoustic emission signals that were registered with the AMSY-6 system. The relationship between the change in impact energy and the registered parameters of acoustic response signals was established. Three characteristic frequency ranges, correlated with
matrix cracking, delamination and fiber breakage, were identified. The conclusion was made about
the significant influence of preliminary dynamic impacts on the deformation and fracture patterns of
laminated-fiber polymer composite materials. |
| Keywords |
composite materials, drop-weight impact, post-impact stretching, residual strength, impact sensitivity threshold, acoustic emission, digital image correlation |
| Received |
30 October 2024 | Revised |
10 November 2024 | Accepted |
11 November 2024 |
| Link to Fulltext |
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