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Titolo:
Characteristics of three-dimensional stress fields in plates with a through-the-thickness crack
Autore:
Kwon, SW; Sun, CT;
Indirizzi:
Purdue Univ, Sch Aeronaut & Astronaut Engn, W Lafayette, IN 47907 USA Purdue Univ W Lafayette IN USA 47907 naut Engn, W Lafayette, IN 47907 USA
Titolo Testata:
INTERNATIONAL JOURNAL OF FRACTURE
fascicolo: 3, volume: 104, anno: 2000,
pagine: 291 - 315
SICI:
0376-9429(200008)104:3<291:COTSFI>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUARTER-INFINITE CRACK; 3-DIMENSIONAL THEORY; INTENSITY FACTORS; SINGULAR STRESS; HALF-SPACE; SURFACE; BODIES; STATE; TIP;
Keywords:
three-dimensional stress; global-local finite element analysis; degree of plane strain vertex singularity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Kwon, SW Purdue Univ, Sch Aeronaut & Astronaut Engn, W Lafayette, IN 47907USA Purdue Univ W Lafayette IN USA 47907 , W Lafayette, IN 47907 USA
Citazione:
S.W. Kwon e C.T. Sun, "Characteristics of three-dimensional stress fields in plates with a through-the-thickness crack", INT J FRACT, 104(3), 2000, pp. 291-315

Abstract

Three-dimensional finite element analyses were performed on plates with a through-the-thickness crack. Global-local finite element technique with sub-modeling was used to achieve the refinement required to obtain an accuratestress field. The existence of a weaker singularity was verified, and a model was proposed to explain the behavior of stresses in the boundary layer. This model is able to account for the competing interaction between the inverse square root singular term and the vertex singular term. The energy release rate was calculated using the modified crack closure method and energy balance. A simple technique without 3-D calculation was suggested for evaluating an approximate 3-D stress intensity factor at the mid-plane. The effect of plate thickness on the size of the three-dimensional region was studied, and the validity of two-dimensional linear elastic fracture mechanicswas discussed.

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Documento generato il 24/09/20 alle ore 10:27:10