Experimental and numerical crack paths in PUR foams

Marșavina, Liviu; Constantinescu, Dan Mihai; Linul, Emanoil; Stuparu, Adrian; Apostol, Dragoş Alexandru

doi:10.1016/j.engfracmech.2016.03.043

Cited by 45 publications

(22 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simulation of crack initiation and propagation in PUR foams was investigated numerically using extended FE method by Marsavina et al 112,113 for mixed‐mode cracks and by Apostol et al 114 for mode II cracks. In both studies, the simulated crack propagation paths are in good agreement with the observed experimental paths (Figure 30).…”

Section: Mixed‐mode Fracture Toughnessmentioning

confidence: 99%

Fracture toughness of rigid polymeric foams: A review

Marșavina

Linul

2020

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

Polymeric foams have good capacity of absorbing energy in compression but are brittle in tension. Linear elastic fracture mechanics is successfully applied to assess the integrity of polymeric foam-based composite structures. The fracture toughness represents an important parameter. The different approaches to estimate the fracture toughness of polymeric foams are reviewed: analytical and numerical micromechanical models and experimental investigations. Focus is given on the parameters influencing the fracture toughness of polymeric foams like specimen type, solid material, density, loading speed, size effect and temperature. Data on mixed-mode loading and dynamic fracture toughness are also presented. The last part of the paper presents some results to increase the fracture toughness by reinforcing of polymeric foams.

show abstract

Section: Mixed‐mode Fracture Toughnessmentioning

confidence: 99%

Fracture toughness of rigid polymeric foams: A review

Marșavina

Linul

2020

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, the different core material also has an effect on the performance of the adhesive. Khan et al [16] studied the in-plane and out-of-plane compression property of honeycomb core, whereas Marsavina [17] and Linul et al [18] studied the bending performance, simulation method of Polyurethane (PUR) foam under different densities with different fracture criteria, and the energy absorption efficiency diagram under in-plane compression. All of them are instructive to research AIREX R82.80 Polyetherimide (PEI) foam used in this paper.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of Adhesive Material for Sandwich Panel under Edgewise Compression Condition

et al. 2020

View full text Add to dashboard Cite

In order to study the interfacial adhesive material simulation method of a sandwich structure with aluminum alloy panels and a low-density foam core under edgewise compression condition, two finite element models were defined using material model no. 185 (MAT 185) adhesive element and tiebreak contact, respectively, by LS-DYNA. Under the conditions of different loading rates, and element sizes, the effects of peak load, energy absorption, failure mode of adhesive layer and the influence degree of the changing condition on the calculated results were compared between the two models, and then compared with the experiment results and theoretical results. The higher the loading rate was, or the smaller the element size was, the higher the peak load was. The simulation results obtained using MAT 185 were closer to the experimental results under the edgewise compression condition.

show abstract

“…Possible fracture mechanics criteria for a search of the crack path can be found in the following references (e.g. [1][2][3][4][5][6][7][8][9][10][11]. For example, the differences between shear and tensional strength of the material are included in the maximum effective stress criterion in searching the angle of crack propagation for mixed mode I/II loading.…”

Section: Introductionmentioning

confidence: 99%

Two basic approaches in a search of the crack propagation angle

Matvienko

Morozov

2017

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Two basic approaches in predicting crack paths have been analysed, namely, incremental method and integral (global) method. Incremental methods are associated with the local criterion of fracture mechanics and pointed out on the estimation of an angle between directions of the initial crack propagation and succeeding crack increment. The local fracture criterion of the maximum average tangential stress in the vicinity of fracture process zone including two terms of the Williams series solution for the mixed mode I/II loading has been used for predicting the angle of surface crack growth under conditions of rolling–sliding. The integral method is associated with a variation principle of fracture mechanics. This principle postulates the minimum of the certain functional. This functional contains the weight function depending on the stress and strain state in the uncracked solid and search functions which are described the crack propagation angle on the surface. To validate the variation principle in the search of crack trajectory, this trajectory has been estimated for plates under different loading conditions.

show abstract

Experimental and numerical crack paths in PUR foams

Cited by 45 publications

References 29 publications

Fracture toughness of rigid polymeric foams: A review

Fracture toughness of rigid polymeric foams: A review

Simulation Study of Adhesive Material for Sandwich Panel under Edgewise Compression Condition

Two basic approaches in a search of the crack propagation angle

Contact Info

Product

Resources

About