On the behavior of crack surface ligaments

P. Nilsson; P. Ståhle; K. G. Sundin

doi:10.1016/s0029-5493(98)00160-5

On the behavior of crack surface ligaments

P. Nilsson, P. Ståhle, K. G. Sundin

Luleå University of Technology

Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

Sammanfattning

Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable crack tip speeds during dynamic fracture are discussed. (C) 1998 Elsevier Science S.A. All rights reserved.

Originalspråk	engelska
Sidor (från-till)	145-153
Antal sidor	9
Tidskrift	Nuclear Engineering and Design
Volym	184
Nummer	1
DOI	https://doi.org/10.1016/s0029-5493(98)00160-5
Status	Published - 1998
Externt publicerad	Ja

Bibliografisk information

Nilsson, P Stahle, P Sundin, KG Pressure Vessels and Piping Conference of the American-Society-of-Mechanical-Engineers Jul 23-27, 1995 Honolulu, hawaii Amer Soc Mech Engineers Stahle, Per/J-3590-2014

Ämnesklassifikation (UKÄ)

Maskinteknik
Materialteknik

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10.1016/s0029-5493(98)00160-5

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title = "On the behavior of crack surface ligaments",

abstract = "Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable crack tip speeds during dynamic fracture are discussed.",

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AU - Ståhle, P.

AU - Sundin, K. G.

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N2 - Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable crack tip speeds during dynamic fracture are discussed.

AB - Small ligaments connecting the fracture surfaces just behind a moving crack front are assumed to exist under certain conditions. The ligaments are rapidly torn as the crack advances. Inelastic straining of such ligaments influences the energy balance in the fracture process. The rapid tearing of a single ligament is studied both numerically and experimentally. An elastic visco-plastic material model is adopted for finite-element calculations. The results show that relatively large amounts of energy are dissipated during the tearing process. Further, the energy needed to tear a ligament increases rapidly with increasing tearing rate. The computed behavior is partly verified in a few preliminary experiments. The implications for slow stable crack tip speeds during dynamic fracture are discussed.

U2 - 10.1016/s0029-5493(98)00160-5

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VL - 184

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EP - 153

JO - Nuclear Engineering and Design

JF - Nuclear Engineering and Design

IS - 1

ER -

On the behavior of crack surface ligaments

Sammanfattning

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