Results 91 to 100 of about 321,633 (209)

Fatigue crack initiation and small crack growth in several airframe alloys [PDF]

The growth of naturally-initiated small cracks under a variety of constant amplitude and variable amplitude load sequences is examined for several airframe materials: the conventional aluminum alloys, 2024-T3 and 7075-T6, the aluminum-lithium alloy, 2090-
Everett, R. A., Jr., Newman, J. C., Jr., Phillips, E. P., Swain, M. H.   +3 more
core   +1 more source

Application of local and non-local approaches to multiple fatigue crack initiation and propagation [PDF]

, 2003
Fatigue strength conditions presented in terms of normalized equivalent stress functionals defined on loading processes are used to unite the stages of material damage with fatigue crack initiation and multiple crack propagation under arbitrary loading ...
Mikhailov, SE, Namestnikova, IV
core  

Characterization of fatigue crack initiation and propagation in Ti-6Al-4V with electrical potential drop technique [PDF]

Electrical potential methods have been used in the past primarily to monitor crack length in long crack specimens subjected to fatigue loading. An attempt was made to develop test procedures for monitoring the fatigue crack initiation and the growth of ...
Kalluri, Sreeramesh, Telesman, Jack
core   +1 more source

Observation and analysis of process zone–crack interaction in crack layer during fatigue crack propagation in polypropylene

Journal of Materials Research and Technology
Fatigue crack propagation in polypropylene, despite its significance in a wide range of structural applications, has not been sufficiently researched because of the complex interaction between the crack tip and process zone ahead of the crack tip.
Sang Min Lee, Ilhyun Kim, Byoung-Ho Choi
doaj   +1 more source

Fatigue failure analysis of pin-loaded lugs

Fracture and Structural Integrity, 2015
In the present paper, mathematical models are proposed in order to analyze the strength of pinloaded lugs with semi-elliptical crack and through-the-thickness crack.
Slobodanka Boljanovic, Stevan Maksimovic
doaj  

Finite element models for predicting crack growth characteristics in composite materials [PDF]

Two dimensional and quasi-three dimensional, linear elastic finite element models for the prediction of crack growth characteristics, including crack growth direction, in laminated composite materials are presented.
Buczek, M. B., Herakovich, C. T.
core   +1 more source

Analysis of a turbine rotor containing a transverse crack at Oak Creek Unit 17 [PDF]

, 1982
Transient increases in one, two and three per revolution vibration characteristics of a low pressure steam turbine were observed during steam temperature reduction operations.
Kottke, J. J., Menning, R. H., Rau, C. A., Jr., Rogers, G. W.   +3 more
core   +1 more source

Modeling of crack bridging in a unidirectional metal matrix composite [PDF]

The effective fatigue crack driving force and crack opening profiles were determined analytically for fatigue tested unidirectional composite specimens exhibiting fiber bridging. The crack closure pressure due to bridging was modeled using two approaches;
Ghosn, Louis J., Kantzos, Pete, Telesman, Jack   +2 more
core   +1 more source

FRACTURE PARAMETER AND FATIGUE CRACK GROWTH RATE MODEL FOR COMMERCIAL PURE TITANIUM UNDER DIFFERENT CRACK TIP PLASTIC STATES

Jixie qiangdu
It's an important task that choosing appropriate fracture parameters and predicting the fatigue crack growth rate accurately considering the different degrees of plastic deformation at the crack tip.The relation between crack tip fracture parameters and ...
doaj  

Accommodating and cracking mechanisms in low-cycle fatigue [PDF]

The three main stages of fatigue life (accommodation, crack initiation and crack growth) are briefly reviewed. The cyclic behavior of annealed or predeformed face-centered cubic metals is described.
Pineau, A.
core   +1 more source