Micromechanisms of deformation and fracture of polypropylene nonwoven fabrics

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:48

Article

Ridruejo, Alvaro^1,2  Gonzalez, Carlos^1,2,3  LLorca, Javier^1,2,3 

[1] Univ Politecn Madrid, Dept Mat Sci, Madrid 28040, Spain

[2] UPM, CISDEM, CSIC, ETS Ingenieros Caminos, Madrid 28040, Spain

[3] IMDEA Mat Inst, Madrid Inst Adv Studies Mat, Madrid 28040, Spain

关键词: Nonwoven fabrics;    Experimental micromechanics;    Polypropylene;   

DOI  :  10.1016/j.ijsolstr.2010.09.013

来源: Elsevier

【 摘 要 】

The micromechanisms of deformation and fracture in tension were analyzed in a commercial polypropylene nonwoven geotextile material in a wide range of strain rates Two different loading scenarios (smooth and notched specimens) were considered to study how these mechanisms are modified in presence of a stress concentration The nonwoven fabric presented significant deformability and energy-absorption capability which decreased with the strain rate together with a high level of strength which increased with strain rate In addition the material was notch-insensitive as the stress concentration around the crack tip was relieved by marked nonlinear behavior which induced crack blunting Different experimental techniques (standard mechanical tests in situ testing within the scanning electron microscope digital image correlation etc) were used to establish the sequence of deformation and failure processes and to link these micromechanisms with the macroscopic behavior (C) 2010 Elsevier Ltd All rights reserved

【 授权许可】

Free