Download or read book Peridynamic Analysis of Fatigue Crack Growth in Fillet Welded Joints written by KyuTack Hong and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue assessment is one of the significant factors to be considered for a design life of structure and estimation of structural reliability during operation. Especially, for welded structures, various welding effects, such as stress concentration, residual stresses, weld geometry and weld quality, make the structure more vulnerable to fatigue failures. This requires more effective approaches for estimating fatigue performances of welded structures.Existing classical methods to predict the crack propagation under cyclic loadings have some difficulties in treating complicated patterns of crack growth. A peridynamic theory, however, has powerful advantage on discontinuities. A peridynamic fatigue model, which is a bond damage model of remaining life, is used to demonstrate two phases of fatigue failure, crack nucleation and crack growth. Two types of numerical tests are conducted to validate the peridynamic fatigue model. One is tensile test for the phase of crack nucleation and the other is compact tension test for the phase of crack growth. All results from numerical tests are compared with experimental test data to validate the peridynamic fatigue model.After validation of peridynamic fatigue model, numerical tests with peridynamic fatigue model are performed to investigate a weld effect of the length of unwelded zone on the fatigue performance of load-carrying fillet welded joint. Numerical results of fatigue performance and path of fatigue crack growth are compared with existing experimental data.In this thesis, the peridynamic fatigue model is validated by two different fatigue tests which are uniaxial tension-compression tests for the crack nucleation and ASTM E647 standard compact tests for the crack growth. After validation, the fatigue performance of the fillet welded joint is estimated with respect to the length of unwelded zone by simulating the fatigue crack growth under cyclic load conditions with the peridynamic fatigue model.
Download or read book Early Fatigue Crack Growth at Welds written by C. C. Monahan and published by Computational Mechanics. This book was released on 1995 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulation of Fatigue Crack Growth in Load and Non load carrying Fillet Welded Joints written by Mubashar Ahmad and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue is one of the major causes of failure in cyclically loaded structures such as, bridges, locomotive parts, rotating machinery components, etc. Welded structures are common in ship building. These welded structures are subjected to fluctuating loads in offshore environment, which requires proper attention for fatigue failure in the design phase of such structures. Although, lab tests can be conducted for concerned materials under controlled environmental conditions, but it is a cost and time intensive approach, and is not always possible. A number of assessments have been carried out over the years for a number of common structural configurations to standardize the design for fatigue and make it less cost-intensive. However, the amount of established standards is still very small relative to the number of possible design configurations. Hence, there is a constant need for numerical models which aim at estimating the fatigue life without the need for tests to be conducted. Crack Propagation is one of the established numerical approaches used for assessing remaining fatigue life of structures which are already in service. This approach is based on the assumption of an initial crack already existing in the structure, and consequently, the remaining fatigue life is considered to be dominated by crack propagation stage. The same can be considered true for welded structures, where weld imperfections and weld gaps act as micro-cracks and the service life of such structures can be considered to be dominated by crack growth stage. This study aims at evaluating the ability of crack propagation approach to predict the fatigue life of fillet welded joints. For this purpose, a numerical simulation tool called Franc2D is used to calculate the stress intensity factors (SIF) from 2D models. These values along with other factors are used as inputs for Paris and Erdogan Law to predict the fatigue life of load carrying and non-load carrying fillet welds. These results are then compared to the lab test results and the conclusions are drawn.
Download or read book The Fatigue Strength of Transverse Fillet Welded Joints written by T R Gurney and published by Elsevier. This book was released on 1991-01-03 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is the result of a major study on the influence of both main plate thickness and of attachment size on the fatigue strength of joints with transverse non-load-carrying fillet welds. In particular, it defines the extent to which the size of the attachment might influence the thickness effect in such joints. Through a whole range of different tests, the study confirms that the present thickness effect correction for certain types of joint is too severe.
Download or read book Fracture Mechanics Analysis of the Fatigue Behavior of a Fillet Welded Joint written by S. J. Maddox and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The existence of a simple relationship between rate of crack propagation and range of stress intensity factor provides a method of calculating the fatigue strength of welded joints containing cracks or crack-like defects.
Download or read book Fatigue Crack Growth in a Fillet Welded Joint written by I. F. C. Smith and published by . This book was released on 1982 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Assessment of Welded Joints by Local Approaches written by Dieter Radaj and published by Woodhead Publishing. This book was released on 1998 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue and Fracture of Weldments written by Uwe Zerbst and published by Springer. This book was released on 2018-12-11 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and thorough guide to those readers who are lost in the often-confusing context of weld fatigue. It presents straightforward information on the fracture mechanics and material background of weld fatigue, starting with fatigue crack initiation and short cracks, before moving on to long cracks, crack closure, crack growth and threshold, residual stress, stress concentration, the stress intensity factor, J-integral, multiple cracks, weld geometries and defects, microstructural parameters including HAZ, and cyclic stress-strain behavior. The book treats all of these essential and mutually interacting parameters using a unique form of analysis.
Download or read book Fatigue Assessment of Welded Joints by Local Approaches written by Dieter Radaj and published by Woodhead Publishing. This book was released on 2006-10-30 with total page 661 pages. Available in PDF, EPUB and Kindle. Book excerpt: Local approaches to fatigue assessment are used to predict the structural durability of welded joints, to optimise their design and to evaluate unforeseen joint failures. This standard work provides a systematic survey of the principles and practical applications of the various methods. It covers the hot spot structural stress approach to fatigue in general, the notch stress and notch strain approach to crack initiation and the fracture mechanics approach to crack propagation. Seam-welded and spot-welded joints in structural steels and aluminium alloys are also considered.This completely reworked second edition takes into account the tremendous progress in understanding and applying local approaches which has been achieved in the last decade. It is a standard reference for designers, structural analysts and testing engineers who are responsible for the fatigue-resistant in-service behaviour of welded structures. - Completely reworked second edition of a standard work providing a systematic survey of the principles and practical applications of the various methods - Covers the hot spot structural stress approach to fatigue in general, the notch stress and notch strain approach to crack initiation and the fracture mechanics approach to crack propagation. - Written by a distinguished team of authors
Download or read book The Effect of Plate Thickness on the Fatigue Strength of Fillet Welded Joints written by Stephen John Maddox and published by . This book was released on 1987 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prediction of Fatigue Crack Growth Behavior in Fillet Welded Joints written by L. Tsai Chon and published by . This book was released on 1987 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical and Experimental Analyses of Surface Fatigue Cracks in Weldments written by G. Glinka and published by . This book was released on 1990 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stress-intensity factor for a semi-elliptical surface crack in T-butt welded joints has been studied by using the weight function approach. The weight functions for cracks in welded joints have been derived by employing the method proposed by Petroski-Achenbach. The calculated stress-intensity factors were compared with those obtained from the variable-amplitude fatigue tests conducted on a series of T-butt welded joints. It has been shown that the weight functions provided sufficiently accurate solutions, in terms of the agreement between the calculated and measured stress-intensity factors and fatigue crack propagation lives. The method proved to be useful in studying weld plate thickness and weld geometry effects on fatigue crack growth in welded joints.
Download or read book Fatigue Strength of Fillet Welded Connections written by Karl Heinz Frank and published by . This book was released on 1972 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes a study of the fatigue behavior of fillet welded joints stressed perpendicular to the weld line. The study included an experimental phase in which the stress-life and cracking behavior of load and non-load carrying fillet weld joints was determined. This experimental study concentrated on the fatigue behavior in the transition region between high and low cycle fatigue. The second phase of the study was the determination of the fracture mechanics stress intensity factor for cracks at the weld toe or root of fillet welded joints. The finite element technique was used to determine the compliance of typical fillet welded joints. (Author).
Download or read book Fatigue and Fracture of Weldments written by Uwe Zerbst and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and thorough guide to those readers who are lost in the often-confusing context of weld fatigue. It presents straightforward information on the fracture mechanics and material background of weld fatigue, starting with fatigue crack initiation and short cracks, before moving on to long cracks, crack closure, crack growth and threshold, residual stress, stress concentration, the stress intensity factor, J-integral, multiple cracks, weld geometries and defects, microstructural parameters including HAZ, and cyclic stress-strain behavior. The book treats all of these essential and mutually interacting parameters using a unique form of analysis.
Download or read book Simulation of Fatigue Crack Growth in Welded Joints by Using the Effective Cycling J integral written by Désiré Tchoffo Ngoula and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture and Fatigue of Welded Joints and Structures written by K. Macdonald and published by Woodhead Publishing. This book was released on 2011-05 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue is often a precursor to the fracture of a welded joint, and this reference summarizes the latest research in understanding fatigue and fracture in welded joints and structures.
Download or read book A Simple Model of Fatigue Crack Growth in Welded Joints written by T. W. Thorpe and published by . This book was released on 1986 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The late 19th- and early 20th-centuries saw an unprecedented wave of public celebration of the past. Throughout the western world, heroes and great evens from earlier times were celebrated through such devices as staging lavish parades, constructing intricately designed monuments and mounting theatrical re-enactments of pivotal moments in history. In Quebec, two individuals occupied centre stage. Between 1878 and 1908, Samuel de Champlain, the founder of Quebec City (and often referred to as the lay father of French-Canadian civilization) and Mgr Francois de Laval, the first bishop of Quebec (and often seen as French Canada's religious father), were feted in four commemorative mega-events staged in the streets of Quebec City.
