A numerical methodology for monitoring stress distributions and experimental proof of the concept on metal embedded thin polymer-matrix composites using X-ray Diffraction


Demir E., Sas H. S. , Isik M. , Gungor E. A. , Davut K.

THIN-WALLED STRUCTURES, vol.173, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 173
  • Publication Date: 2022
  • Doi Number: 10.1016/j.tws.2022.108942
  • Title of Journal : THIN-WALLED STRUCTURES
  • Keywords: XRD, Residual stresses, Polymer-matrix composites, Plane stress, Least-squares FEM, Meshless interpolation, RESIDUAL-STRESSES, EPOXY COMPOSITES, HIGH-STRENGTH, STRAIN-GAUGE, FIBER, INTEGRATION, ADHESION, SENSORS, DESIGN

Abstract

In this study, a numerical methodology is developed to monitor stress distributions and an experimental technique is investigated to measure stresses on metal embedded polymer matrix fiber-reinforced composite materials using X-ray diffraction (XRD) method. The numerical method successfully predicts the stress distributions using only a few data points with an average accuracies of 11.6% and 11.8%, respectively for tapered and open hole tensile sample geometries. Experimental part of this study investigates different methodologies to measure stresses on surfaces of polymer composites materials of thin walled structures by XRD. For this reason, metallic materials were integrated onto the surface and near-surface of polymer matrix composites in three different configurations as in the forms of metal foil, metal powder, and metal wire mesh. In-situ experiments of measured and applied stresses revealed metal powder embedded composite materials as a promising material configuration for reliable monitoring of stresses.