Particle toughening of polymers by plastic void growth

2010 ◽  
Vol 70 (6) ◽  
pp. 885-891 ◽  
Author(s):  
J.G. Williams
Keyword(s):  
Void Growth ◽  
Plastic Void Growth

Mechanism of plastic void growth during superplastic flow

1986 ◽  
Vol 2 (11) ◽  
pp. 1086-1092 ◽  
Author(s):  
D. S. Wilkinson ◽  
C. H. Caceres
Keyword(s):  
Void Growth ◽  
Superplastic Flow ◽  
Plastic Void Growth

Investigation into the toughening mechanism of epoxy reinforced with multi-wall carbon nanotubes

e-Polymers ◽  
2015 ◽  
Vol 15 (5) ◽  
pp. 335-343 ◽  
Author(s):  
Xiaoyan Li ◽  
Wenjing Zhang ◽  
Shiwei Zhai ◽  
Shawei Tang ◽  
Xiaoqin Zhou ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Void Growth ◽  
Bending Test ◽  
Propagation Path ◽  
Toughening Mechanism ◽  
Stress Concentrations ◽  
Multi Wall Carbon Nanotubes ◽  
Pull Out ◽  
Plastic Void Growth

AbstractThis study reports the reinforcement and fracture toughening mechanism of pristine multi-walled carbon nanotubes (MWCNTs) on epoxy matrix. The tensile strength and fracture energy (GIC) of the epoxy polymer increased simultaneously upon the addition of a small amount of MWCNTs. The fracture surfaces of single-edge-notch three-point bending test specimens were analysed by scanning electron microscopy, and the double-notch four-point bending technique was used to investigate the fracture process by transmission electron microscopy, respectively. MWCNT pull-out and subsequent plastic void growth were found; meanwhile, fracture of MWCNTs was observed along the crack propagation path. The theoretical model of shearing band initiated by the stress concentrations around the MWCNTs is the dominant toughening mechanism. While the crack bridging of MWCNTs and the plastic void growth of epoxy also have a toughening effect.

A continuum model for finite void growth around spherical inclusion

1993 ◽  
Vol 30 (2) ◽  
pp. 237-248 ◽  
Author(s):  
L.L. Kozhevnikova ◽  
V.V. Moshev ◽  
A.A. Rogovoy
Keyword(s):  
Void Growth ◽  
Continuum Model ◽  
Spherical Inclusion

Void-Growth Computational Analysis in Elastic-Plastic Porous Materials

2021 ◽  
pp. 107021
Author(s):  
R. Bensaada ◽  
T. Kanit ◽  
A. Imad ◽  
M. Almansba ◽  
A. Saouab
Keyword(s):  
Porous Materials ◽  
Void Growth ◽  
Computational Analysis ◽  
Elastic Plastic

Ductile Damage Model Based On Void Growth Analysis for Application to Ductile Crack Growth Simulation

2021 ◽  
Author(s):  
Takehisa Yamada ◽  
Mitsuru Ohata
Keyword(s):  
Crack Growth ◽  
Void Growth ◽  
Damage Evolution ◽  
Damage Model ◽  
Crack Growth Resistance ◽  
Growth Behavior ◽  
Ductile Crack ◽  
Growth Simulation ◽  
Crack Growth Simulation ◽  
Ductile Crack Growth

Abstract The aim of this study is to propose damage model on the basis of the mechanism for ductile fracture related to void growth and to confirm the applicability of the proposed model to ductile crack growth simulation for steel. To figure out void growth behavior, elasto-plastic finite element analyses using unit cell model with an initial void were methodically performed. From the results of those analyses, it was evident that the relationships between normalized void volume fraction and normalized strain by each critical value corresponding to crack initiation were independent of stress-strain relationship of material and stress triaxiality state. Based on this characteristic associated with void growth, damage evolution law was derived. Then, using the damage evolution law, simple and phenomenological ductile damage model reflecting void growth behavior and ductility of material was proposed. To confirm the validation and application of proposed damage model, the damage model was implemented in finite element models and ductile crack growth resistance was simulated for cracked components were performed. Then, the simulated results were compared with experimental ones and it was found that the proposed damage model could accurately predict ductile crack growth resistance and was applicable to ductile crack growth simulation.

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