An experimental and numerical study to evaluate the crack path under mixed mode loading on pvc foams

Domenico Bruno, Francesco Fabbrocino, Marco Francesco Funari, Fabrizio Greco, Paolo Lonetti, Saverio Spadea

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Being able to provide outstanding performances under out-of-plane loading, sandwich structures offer great flexibility for the design of lightweight structural systems. However, they can be affected by macroscopic and microscopic damages, which may trigger catastrophic failure modes. As a consequence, a detailed understanding of the propagation of macro-cracks in the core as well as of delamination phenomena at face-to-core interfaces are aspects of great computational interest. Moreover, linking sophisticated numerical models with the measurement of the mechanical properties of materials is fundamental in view of actual engineering applications. The elastic and fracture characterization of the core is particularly relevant because its cracking strongly reduces the capacity of the sandwich structures to carry out loads. To this end, PVC foams typically used as inner core in structural application are investigated over a range of foam densities. Firstly, the elastic properties of foams under compressive uni-axial loading are measured using the full-field methodology. Subsequently, Asymmetric Semi-Circular Bend (ASCB) specimens are tested varying the position of supports to generate all range of mixed fracture modes. Finally, some of the mostly recognized fracture criterions have been considered, and their capability to compute the crack propagation angles in PVC foams have been evaluated. The parameters experimentally determined have been used to test the accuracy of the response provided by a numerical model developed by the authors.

Original languageEnglish
Title of host publicationProceedings of XXIV AIMETA Conference 2019
EditorsAntonio Carcaterra, Giorgio Graziani, Achille Paolone
PublisherSpringer Verlag
Pages378-388
Number of pages11
ISBN (Electronic)9783030410575
ISBN (Print)9783030410568
DOIs
Publication statusPublished - 31 Mar 2020
Event24th Conference of the Italian Association of Theoretical and Applied Mechanics, AIMETA 2019 - Rome, Italy
Duration: 15 Sep 201919 Sep 2019

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

Conference24th Conference of the Italian Association of Theoretical and Applied Mechanics, AIMETA 2019
CountryItaly
CityRome
Period15/09/1919/09/19

Keywords

  • Crack path
  • DIC
  • PVC foam
  • Sandwich structures

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  • Cite this

    Bruno, D., Fabbrocino, F., Funari, M. F., Greco, F., Lonetti, P., & Spadea, S. (2020). An experimental and numerical study to evaluate the crack path under mixed mode loading on pvc foams. In A. Carcaterra, G. Graziani, & A. Paolone (Eds.), Proceedings of XXIV AIMETA Conference 2019 (pp. 378-388). (Lecture Notes in Mechanical Engineering). Springer Verlag. https://doi.org/10.1007/978-3-030-41057-5_31