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Author: D. N. Williams Publisher: ISBN: Category : Languages : en Pages : 11
Book Description
Studies were conducted to determine whether subcritical crack growth under sustained load was related to creep-rupture or hydrogen embrittlement. Crack growth in titanium alloys was strongly affected by variations in hydrogen content, indicating that hydrogen embrittlement was a primary factor. Aluminum alloys, which are not susceptible to hydrogen embrittlement, showed no evidence of subcritical crack growth under sustained load. Variations in the hydrogen content in titanium alloys also affected creep resistance and fracture toughness, both of which influenced the susceptibility to subcritical crack growth under sustained load. (Author).
Author: D. N. Williams Publisher: ISBN: Category : Languages : en Pages : 11
Book Description
Studies were conducted to determine whether subcritical crack growth under sustained load was related to creep-rupture or hydrogen embrittlement. Crack growth in titanium alloys was strongly affected by variations in hydrogen content, indicating that hydrogen embrittlement was a primary factor. Aluminum alloys, which are not susceptible to hydrogen embrittlement, showed no evidence of subcritical crack growth under sustained load. Variations in the hydrogen content in titanium alloys also affected creep resistance and fracture toughness, both of which influenced the susceptibility to subcritical crack growth under sustained load. (Author).
Author: Dean N. Williams Publisher: ISBN: Category : Languages : en Pages : 13
Book Description
Subcritical crack growth under sustained load in a Ti-4Al-3Mo-1V alloy has been investigated using compact tension specimens under constant load. Crack growth sufficient to cause failure in less than one week was observed at initial stress intensities as low as 0.45 K sub c. Subcritical crack growth was not attributable to stress corrosion; it occurred more readily in vacuum than in salt water. Since the alloy was stabilized in vacuum prior to test, metallurgical instability also appears an unlikely contributory factor. Tests of specimens of several thicknesses having variable degrees of triaxial loading across the crack front suggest that subcritical crack growth is controlled by the combined influences of creep in the uncracked surface region under plane stress loading and strain-dependent plane strain fracture in the central region and triaxial loading. (Modified author abstract).
Author: Ashok Saxena Publisher: CRC Press ISBN: 1000823768 Category : Science Languages : en Pages : 350
Book Description
This textbook provides a comprehensive guide to fracture mechanics and its applications, providing an in-depth discussion of linear elastic fracture mechanics and a brief introduction to nonlinear fracture mechanics. It is an essential companion to the study of several disciplines such as aerospace, biomedical, civil, materials and mechanical engineering. This interdisciplinary textbook is also useful for professionals in several industries dealing with design and manufacturing of engineering materials and structures. Beginning with four foundational chapters, discussing the theory in depth, the book also presents specific aspects of how fracture mechanics is used to address fatigue crack growth, environment assisted cracking, and creep and creep-fatigue crack growth. Other topics include mixed-mode fracture and materials testing and selection for damage tolerant design, alongside in-depth discussions of ensuring structural integrity of components through real-world examples. There is a strong focus throughout the book on the practical applications of fracture mechanics. It provides a clear description of the theoretical aspects of fracture mechanics and also its limitations. Appendices provide additional background to ensure a comprehensive understanding and every chapter includes solved example problems and unsolved end of chapter problems. Additional instructor support materials are also available.
Author: Ashok Saxena Publisher: CRC Press ISBN: 9780849394966 Category : Science Languages : en Pages : 488
Book Description
Fracture mechanics is an essential tool for engineers in a number of different engineering disciplines. For example, an engineer in a metals- or plastics-dependent industry might use fracture mechanics to evaluate and characterize materials, while another in aerospace or construction might use fracture mechanics-based methods for product design and service life-time estimation. This balanced treatment, which covers both applied engineering and mathematical aspects of the topic, provides a much-needed multidisciplinary treatment of the field suitable for the many diverse applications of the subject. While texts on linear elastic fracture mechanics abound, no complete treatments of the complex topic of nonlinear fracture mechanics have been available in a textbook format - until now. Written by an author with extensive industry credentials as well as academic experience, Nonlinear Fracture Mechanics for Engineers examines nonlinear fracture mechanics and its applications in mechanics, materials testing, and life prediction of components. The book includes the first-ever complete examination of creep and creep-fatigue crack growth. Examples and problems reinforce the concepts presented. A complete chapter on applications and case studies involving nonlinear fracture mechanics completes this thorough evaluation of this dynamic field of study.
Author: RJ. Bucci Publisher: ISBN: Category : Crack growth rate Languages : en Pages : 27
Book Description
Fracture toughness, fatigue crack growth rate, and sustained load crack growth data comprise a basic package of materials property information used in predicting growth of cracks by fracture mechanics methods. Accurate analysis requires carefully developed laboratory results using various simple specimen configurations to describe these properties. A contributing factor to variability in life prediction is the lack of consistent procedures for obtaining and reporting this information for use in design. Though a standard does exist for direct fracture toughness determinations (ASTM Method E 399), standards for subcritical crack growth measurement are in various stages of development. Accuracy of life prediction is further confounded by judgment required of the analyst in selecting the most appropriate test and interpreting material property data for use in the computational methodology.
Author: Ashok Saxena Publisher: CRC Press ISBN: 1351004042 Category : Technology & Engineering Languages : en Pages : 398
Book Description
Advanced Fracture Mechanics and Structural Integrity is organized to cover quantitative descriptions of crack growth and fracture phenomena. The mechanics of fracture are explained, emphasizing elastic-plastic and time-dependent fracture mechanics. Applications are presented, using examples from power generation, aerospace, marine, and chemical industries, with focus on predicting the remaining life of structural components and advanced testing metods for structural materials. Numerous examples and end-of-chapter problems are provided, along with references to encourage further study.The book is written for use in an advanced graduate course on fracture mechanics or structural integrity.
Author: D. N. Williams
Author: D. N. Williams
Author: Dean N. Williams
Author: Alan F. Liu
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Author: Ashok Saxena
Author: 
Author: 
Author: Ashok Saxena
Author: RJ. Bucci
Author: Ashok Saxena