Results 261 to 270 of about 500,116 (309)
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2006
Abstract This chapter addresses the cumulative effects of fatigue and how to determine its impact on component lifetime and performance. It begins by defining a loading history and its corresponding hysteresis loops that exposes the deficiencies of some of the theories discussed.
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Abstract This chapter addresses the cumulative effects of fatigue and how to determine its impact on component lifetime and performance. It begins by defining a loading history and its corresponding hysteresis loops that exposes the deficiencies of some of the theories discussed.
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2008
Collagenous tissues can, inevitably, be damaged and broken by overload, but they are also susceptible to the prolonged application of a lesser load. The majority of studies are for bone with tendon in the second place. This chapter therefore concentrates on these tissues.
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Collagenous tissues can, inevitably, be damaged and broken by overload, but they are also susceptible to the prolonged application of a lesser load. The majority of studies are for bone with tendon in the second place. This chapter therefore concentrates on these tissues.
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Multiaxial Fatigue Damage Models
Journal of Engineering Materials and Technology, 1987Two multiaxial fatigue damage models are proposed: a shear strain model for failures that are primarily mode II crack growth and a tensile strain model for failures that are primarily mode I crack growth. The failure mode is shown to be dependent on material, strain range and hydrostatic stress state.
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International Journal of Structural Integrity, 2012
PurposeComposite materials are increasingly used in the structural and mechanical fields, thanks to their high strength‐to‐weight ratios and the possibility of tailoring them to meet specific requirements. This study is focused on the damage to a glass fiber reinforced composite under different loading conditions.
COLOMBO, CHIARA +2 more
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PurposeComposite materials are increasingly used in the structural and mechanical fields, thanks to their high strength‐to‐weight ratios and the possibility of tailoring them to meet specific requirements. This study is focused on the damage to a glass fiber reinforced composite under different loading conditions.
COLOMBO, CHIARA +2 more
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1989
Cyclic flexural load tests of simply supported beams under central concentrated charge were performed, for two different concrete Young modulus. The strain at the most tensioned fiber was measured during experiments. A model for cumulative damage which is proportional to the strain was used to present the results.
A. Alliche, D. Francois
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Cyclic flexural load tests of simply supported beams under central concentrated charge were performed, for two different concrete Young modulus. The strain at the most tensioned fiber was measured during experiments. A model for cumulative damage which is proportional to the strain was used to present the results.
A. Alliche, D. Francois
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Creep Damage and Creep-Fatigue Damage
2011A time-dependent deformation occurring in a material subject to load for a prolonged period of time is called creep. In a narrower sense, creep means a time-dependent deformation caused by a constant stress or a constant load. Materials undergoing creep for long time are often accompanied by time dependent internal deterioration.
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Fatigue Damage Map as a Virtual Tool for Fatigue Damage Tolerance
2009Using only readily available material properties and the concept of dislocation density evolution ahead of the crack tip, the fatigue damage map attends to develop a virtual tool able to predict the limits and the corresponding crack tip propagation rates characterising each of the fatigue stages, namely crack arrest, microstructurally and physically ...
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Journal of Applied Mechanics, 1945
Abstract The phenomenon of cumulative damage under repeated loads was assumed to be related to the net work absorbed by a specimen. The number of loading cycles applied expressed as a percentage of the number to failure at a given stress level would be the proportion of useful life expended.
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Abstract The phenomenon of cumulative damage under repeated loads was assumed to be related to the net work absorbed by a specimen. The number of loading cycles applied expressed as a percentage of the number to failure at a given stress level would be the proportion of useful life expended.
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Multiaxial Fatigue Damage Assessment
1987This paper presents method for multiaxial fatigue damage assessment which is based on the concept of a critical plane for crack nucleation and growth. In this method, both tensile and shear growth are considered to be important. Cyclic hardening cause by out-of-phase loading is included in the constitutive equations for the stress strain simulation ...
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1956
Cumulative damage in fatigue is a problem which in recent years has become of interest to designers in almost all branches of structural engineering. To the aircraft designer however — especially under present-day conditions of operation — it is of paramount importance.
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Cumulative damage in fatigue is a problem which in recent years has become of interest to designers in almost all branches of structural engineering. To the aircraft designer however — especially under present-day conditions of operation — it is of paramount importance.
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