Cone ice crushing tests and simulations associated with various yield and fracture criteria. (13th March 2017)

• Record Type: Journal Article
• Authors: Han, Donghwa; Lee, Heejeong; Choung, Joonmo; Kim, Hyunwook; Daley, Claude
• Is Part Of: Ships and offshore structures. Volume 12:(2017)Supplement 1
• Page Start: S88
• Page End: S99
• Publication Date: 2017-03-13
• Subjects: Cone-shaped ice -- ice spalling -- ice crushing -- Drucker–Prager yield function -- Mohr–Coulomb yield function -- crushable foam yield function -- damage initiation -- damage evolution; Ships -- Periodicals; Offshore structures -- Periodicals; Marine engineering -- Periodicals; Marine engineering -- Technological innovations -- Periodicals; Ocean engineering -- Periodicals; Ocean engineering -- Technological innovations -- Periodicals; 623.8
• DOI: 10.1080/17445302.2016.1266920
• Languages: English
• ISSNs: 1744-5302

Abstract

ABSTRACT: To determine the most reliable numerical simulation parameters affecting the ice resistances, such as yield functions with relevant ice-breaking criteria, compressive volumetric hardening intensities and element sizes, numerical simulations for different parameters were compared with the crushing tests of cone-shaped ice specimens. The yield functions of crushable foam, Drucker–Prager and Mohr–Coulomb were taken into consideration with three different volumetric hardening intensities. The ice resistance variation was also studied for two finite element models with different element sizes. To realize ice breaking in numerical simulations, a damage variable was introduced to trigger fracture initiation and evolution. The nominal contact area-dependent energy per unit area as a damage to fracture was newly proposed from the test results composed of a crushing force versus indenter stroke. This new concept could be realized by applying the different nominal contact area-dependent fracture energies to finite elements along the vertical location.