Modeling the Nonlinear Deformation of Highly Porous Cellular Plastics Filled with Clay Nanoplatelets

Rigid low-density plastic foams subjected to mechanical loads typically exhibit a nonlinear deformation stage preceding failure. At moderate strains, when the geometrical nonlinearity is negligible, such foam response is predominantly caused by the nonlinearity of deformation of their principal structural elements-foam struts. Orientational averaging of stresses in foam struts enables estimation of the stresses taken up by foams at a given applied strain. Based on a structural model of highly porous anisotropic cellular plastics filled with clay nanoplatelets and the orientational averaging, a method for calculating their nonlinear deformation is derived in terms of structural parameters of the porous material, the mechanical properties of the monolithic polymer, and filler particles and their spatial orientation. The method is applied to predicting the tensile stress-strain diagrams of organoclay-filled low-density rigid polyurethane foams, and reasonable agreement with experimental data is demonstrated.

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:15

Enthalten in:

Materials (Basel, Switzerland) - 15(2022), 3 vom: 28. Jan.

Sprache:

Englisch

Beteiligte Personen:

Lagzdiņš, Aivars [VerfasserIn]
Zilaucs, Alberts [VerfasserIn]
Beverte, Ilze [VerfasserIn]
Andersons, Jānis [VerfasserIn]

Links:

Volltext

Themen:

Anisotropy
Cellular plastic
Journal Article
Nanoplatelets
Orientational averaging
Polyurethane foams
Porosity
Structural element

Anmerkungen:

Date Revised 19.02.2022

published: Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.3390/ma15031033

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM336930763