Dynamic propagation and halting of cracks in thin-sheet plastic materials

Journal Article · Wed Jul 01 00:00:00 EDT 1987 · Ind. Lab. (Engl. Transl.); (United States)

OSTI ID:5801068

Gol'tsev, V Yu; Efremov, S L; Kudryavtsev, O G; Matvienko, Yu G

To estimate the fracture resistance of plastic materials, they use the concepts of elastic-plastic fracture mechanics and the corresponding crack resistance characteristics, for example, the energetic contour J-integral. The area under the load P-shift of the points of load application ..delta..'' diagram, on which there is no information about the total specimen energy at the time crack growth ceases in it, is ordinarily used in the experimental determination of the elastic-plastic fracture viscosity (the limit values of the J-integral). At the same time the specimen itself with its stress-strain state in the neighborhood of the crack apex is the carrier of this information. An experimental method is proposed in this paper to determine the elastic-plastic fracture viscosity in the crack halt stage J/sub a/ on thin-sheet plastic specimens with central surface notch on the basis of an analysis of the stress-strain state at the crack apex, executed by using the method of dividing grids.

• Research Organization: Moscow Engineering Physics Institute, USSR
• OSTI ID: 5801068
• Journal Information: Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 53:1; ISSN INDLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CHROMIUM-NICKEL STEELS
CRACK PROPAGATION
DESTRUCTIVE TESTING
DYNAMIC LOADS
ELASTICITY
FRACTURE MECHANICS
FRACTURE PROPERTIES
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
NICKEL ALLOYS
PLASTICITY
SHEETS
STEELS
STRAINS
STRESS INTENSITY FACTORS
STRESSES
TENSILE PROPERTIES
TESTING
VISCOSITY