On the crack path under mixed mode loading on PUR foams
Journal Title: Frattura ed Integrità Strutturale - Year 2015, Vol 9, Issue 34
Abstract
In this paper are presented the crack initiation angles obtained in polyurethane (PUR) foams under mixed mode loading. Closed cell rigid PUR foams having three different densities 100, 145, and 300 kg/m3 were investigated. Experiments were performed using Asymmetric Semi-Circular Bend and Single Edge Crack specimens. The obtained crack initiation values were compared with four fracture criteria to introduce: Maximum Tensile Stress, Strain Energy Density, Maximum Energy Release Rate and Equivalent Stress Intensity Factor, and a good agreement was observed. This allow to conclude that the theoretical fracture criteria developed for solid material could be used with success to predict the crack propagation angles in cellular materials like PUR foams.
Authors and Affiliations
L. Marsavina, E. Linul, T. Voiconi, D. Costantinescu
Keywords
Related Articles
- EP ID EP153932
- DOI 10.3221/IGF-ESIS.34.43
- Views 65
- Downloads 0
The application of the infrared thermography on titanium alloy for studying fatigue behavior
The infrared thermography is an attractive tool for studying the fatigue behavior of materials. Based on two theoretical models of fatigue damage indicators, this work studied the fatigue properties of the virgin T...
A probabilistic interpretation of the Miner number for fatigue life prediction
The Miner number M, used as a tool for lifetime prediction of mechanical and structural components in most of the standards related to fatigue design, is generally accepted as representing a damage stage resultin...
Equi-biaxial loading effect on austenitic stainless steel fatigue life
Fatigue lifetime assessment is essential in the design of structures. Under-estimated predictions may result in unnecessary in service inspections. Conversely, over-estimated predictions may have serious consequen...
Is notch sensitivity a stress analysis problem?
Semi–empirical notch sensitivity factors q have been widely used to properly account for notch effects in fatigue design for a long time. However, the intrinsically empirical nature of this old concept can be avoid...
CH of masonry materials via meshless meso-modeling
In the present study a multi-scale computational strategy for the analysis of masonry structures ispresented. The structural macroscopic behaviour is obtained making use of the Computational Homogenization(CH) tech...