Results 131 to 140 of about 654 (174)

Numerical Investigation on LEFM Limits under LSY Conditions

Key Engineering Materials, 2013
In this work, a parametric numerical investigation on the plastic zone size and shape at the crack front of a through crack in a plate is presented. The thickness of the plate, the size of the crack and the applied remote load values are considered as parameters.
CAPUTO, Francesco, LAMANNA, Giuseppe, Lanzillo L, SOPRANO, Alessandro   +3 more
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Creep Crack Growth Under LEFM Conditions

Journal of Engineering Materials and Technology, 1980
The paper presents an outline model for creep crack growth under LEFM conditions. The incremental nature of the crack propagation process is taken into account, and a theoretical analysis shows that the relation between crack tip stress intensification and crack growth rate is not unique.
R. Pilkington, E. Smith
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Threshold and LEFM

2003
Figure 1 shows crack arrest data for a aluminium alloy. What is the minimum crack size above which the application of LEFM is sound? The grain size of the material is 52 µm.
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Limits to the applicability of LEFM in notch fatigue

Engineering Fracture Mechanics, 1984
Abstract A comparison is made between elastic-plastic, and linear-elastic, fracture mechanics parameters, for notch fatigue problems. It is shown that in high-strength aluminium alloy 2024-T351, at normal working stress levels, the errors involved in using LEFM for any crack detectable during non-destructive testing, is likely to be small.
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Application of Lefm Design to Nuclear Material Transport Casks

International Journal of Radioactive Materials Transport, 1990
AbstractFracture safe design can be assured by proper application of fracture mechanics. Linear elastic fracture mechanics (LEFM) can generally be applied to a broad range of cask designs and component materials. The use of LEFM is straightforward when the linear elastic plane strain fracture toughness (K1c) of the cask material can be directly ...
R. Salzbrenner, K. B. Sorenson, G. W. Wellman   +2 more
openaire   +1 more source

LEFM size requirements for the fracture testing of sea ice

International Journal of Fracture, 2000
The stress-separation curve obtained for the in-situ response of first-year sea ice is used to obtain specimen size requirements for sea ice fracture tests. Issues of notch sensitivity and minimum size requirements for the applicability of linear elastic fracture mechanics are addressed.
S.V. Mulmule, J.P. Dempsey
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Lefm brittle and ductile fractures as described by the T-criterion

Engineering Fracture Mechanics, 1988
Abstract Fracture is connected with limited amounts of plastic expansion, else materials fail by general yielding. This obvious presupposition of fracture may take two limiting algebraic expressions corresponding to extreme brittle and extreme ductile cases, respectively.
N.P. Andrianopoulos, P.S. Theocaris
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Short Cracks and LEFM Error

2003
Figure 1 shows crack growth data from the propagation of a surface crack in a 2024-T351 aluminium alloy specimen subjected to mode I fatigue loading. The loading conditions are: peak stress 325 MPa, stress ratio of 0.1 and fatigue life of 139,500 cycles.
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Lifetime estimates using LEFM

2003
A straight steel tie-bar of circular section, 150 mm in diameter, D, contains a central, transverse penny-shaped crack 8 mm in diameter. The axial load on the bar varies cyclically between 1.5 MN and 4 MN. Estimate the number of load cycles to grow the crack to a diameter (2a) of 30 mm.
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Extension of LEFM for Small-Scale Yielding

2017
Linear elastic fracture mechanics as introduced in Chap. 2 is extended to account for plastic deformations at the crack tip. The concept of an equivalent elastic crack and an effective stress intensity factor for small-scale yielding is explicated.
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