Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-01-01

Journal: OPTICS AND LASERS IN ENGINEERING

Included Journals: EI、SCIE

Volume: 52

Issue: 1

Page Number: 131-139

ISSN: 0143-8166

Key Words: Flexural effect; Core junction; Sandwich; Digital photoelasticity

Abstract: An improved six-step phase shifting method in digital photoelasticity was applied to calculate the fullfield shear stress of cores in sandwich beam under in-plane bending. The load transfer and local stress concentration at the core junctions were investigated. The load transfer was realized by shear bands which connect the top and bottom sheet faces through adhesively bonded interfaces in the sandwich beam. The shear stress on both sides of the core junctions distributed continuously under pure bending, but distributed discontinuously and antisymmetrically under three-point bending. Different to the case under pure bending, the apparent shear stress concentrations existed on the core junction lines under three-point bending and maximized at the three-phase joints. (C) 2013 Elsevier Ltd. All rights reserved.