Articles of The Transactions of KSRC

Resistance of polymeric composites to the non-contact underwater explosion

Full text article ( in russian)

Year	2017
Issue	380
Volume	2
Pages	54-64
Caption	Resistance of polymeric composites to the non-contact underwater explosion
Authors	Dulnev A.I. , Nekliudova E.A. , Weiss I.Yu.
Keywords	polymeric composite, explosion resistance, underwater explosion.
Summary	Object and purpose of research.Study of stress-strain state and ultimate explosion resistance for the GRP samples made of quadraxial fiberglass and vinyl-ether binder, in the conditions of non-contact underwater explosions of various power. Subject matter and methodsExperimental studies in the KSRC Explosion Chamber and computer-aided deformation simulation of the samples in LS-DYNA and AUTODYN for given test conditions. Main results.The paper provides the explosion testing method for the samples. It also suggests an approach to assessing the extent of damage inflicted by the explosion to the material of the samples by three characteristic parameters: binder failure, disruption of separate fibers, piercing damage (hole). The paper describes the developed and validated computer-based models that allowed a more detailed stress-strain state analysis of the samples during the tests. It provides experimental proofs that for the samples manufactured by the infusion method, the most energy-consuming process is disruption of the binder before the disruption of fibers begins. The paper also shows that explosion resistance of these samples in terms of fiber disruption inception can be assessed by the intensity of sample straining. Conclusion.The approach applied in the paper to assess explosion resistance of GRP samples is based on joint analysis of test data and simulation results. This approach has been successfully validated and allowed a more detailed description of straining and failure specifics of the samples at question. This approach can be recommended to assess explosion resistance of polymeric composites made of different reinforcing materials and binders. Besides, this experiment simulating underwater explosion effects can be used to analyse stress-strain state and failure process of the structures made of polymeric composites.
Rubrics	Naval architecture