Rate-dependent viscoplastic modeling and experimental validation of woven glass/epoxy composite materials Articles uri icon

authors

  • SHAFIEI, EHSAN
  • KIASAT, MAHDI SAED
  • BARBERO, EVER JOSE

publication date

  • July 2021

start page

  • 1

end page

  • 17

issue

  • 108827

volume

  • 216

International Standard Serial Number (ISSN)

  • 1359-8368

Electronic International Standard Serial Number (EISSN)

  • 1879-1069

abstract

  • The rate-dependent behavior of woven fabric (WF) composite with material nonlinearity and 3D geometrical nonuniformity are predicted using a proposed micro-meso-scale (MMS) model. The viscoelastic fiber and viscoplastic matrix are combined to obtain the properties of viscoplastic composite tows. Applying geometrical properties of WF and considering different local position and orientation of tows, the orthotropic viscoplastic behavior of WF composite is obtained. A progressive damage model is developed to consider damage modes in the composite tows. The stresses are redistributed over the intact regions according to the occurrence of the specific damage modes. Experimental rate-dependent tests are carried out on the epoxy matrix and unidirectional composite to measure the model constants. The rate dependency of the mechanical properties and nonlinearity of the stress-strain curves of the WF composite are then predicted and compared to additional experimental tests on the WF composite.

subjects

  • Materials science and engineering
  • Mechanical Engineering
  • Physics

keywords

  • elastic-viscoplastic material; constitutive behavior; analytic functions; strengthening and mechanisms; mechanical testing