Download or read book Characterization of Fretting Fatigue Crack Initiation Processes in CR Ti 6Al 4V written by and published by . This book was released on 2003 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to quantify fretting fatigue damage and to evaluate the residual fatigue strength of specimens subjected to a range of fretting fatigue test conditions. Flat Ti-6Al-4V specimen were tested against flat Ti-6Al-4V fretting pads with blending radii at the edges of contact. Fretting fatigue damage for two combinations of static average clamping stress and applied axial stress was investigated for two percentages of total life. Accumulated damage was characterized using full field surface roughness evaluation and scanning electron microscopy (SEM). The effect of fretting fatigue on uniaxial fatigue strength was quantified by interrupting fretting fatigue tests: and conducting uniaxial residual fatigue strength tests at R = 0.5 at 300 Hz. Results from the residual fatigue strength tests were correlated with characterization results.
Download or read book Fretting Fatigue Crack Initiation Behavior of Ti 6Al 4V written by SA. Namjoshi and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting fatigue crack initiation behavior of titanium alloy, Ti-6Al-4V was investigated by using different geometries of the fretting pad. Specimens were examined to determine the crack initiation location and the crack angle orientation along the contact surface. Fretting fatigue experiments were analyzed with the finite element analysis. Several critical plane based parameters were used to predict the number of cycles to fretting fatigue crack initiation, crack initiation location and crack orientation angle along the contact surface. These predictions were compared with the experimental counterparts to study the role of normal and shear stresses on the critical plane in order to characterize fretting fatigue crack initiation behavior. From these comparisons, the fretting fatigue crack initiation mechanism in the tested titanium alloy appears to be governed by the shear stress on the critical plane. However, the role of normal stress on the critical plane at present appears to be unclear.
Download or read book Characterization of Fatigue Crack Initiation and Propagation in Ti 6Al 4V with Electrical Potential Drop Technique written by and published by . This book was released on 1988 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Fatigue Crack Initiation and Propagation in Ti 6Al 4V with Electrical Potential Drop Technique written by Sreeramesh Kalluri and published by . This book was released on 1988 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Tribology written by Jianbin Luo and published by Springer Science & Business Media. This book was released on 2010-07-16 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Advanced Tribology" is the proceedings of the 5th China International Symposium on Tribology (held every four years) and the 1st International Tribology Symposium of IFToMM, held in Beijing 24th-27th September 2008. It contains seven parts: lubrication; friction and wear; micro/nano-tribology; tribology of coatings, surface and interface; biotribology; tribo-chemistry; industry tribology. The book reflects the recent progress in the fields such as lubrication, friction and wear, coatings, and precision manufacture etc. in the world. The book is intended for researchers, engineers and graduate students in the field of tribology, lubrication, mechanical production and industrial design. The editors Jianbin Luo, Yonggang Meng, Tianmin Shao and Qian Zhao are all the professors at the State Key Lab of Tribology, Tsinghua University, Beijing.
Download or read book Surface Modification Technologies written by T. S. Sudarshan and published by ASM International. This book was released on 2006-01-01 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observations and Analysis of Fretting Fatigue Crack Initiation and Propagation written by J-Q Xu and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many factors, such as the amplitude of the cyclic load, the relative rigidity of components and the frictional condition, play important roles in the fretting fatigue process. This study has focused on the local singular stress field at the fatigue crack tip or at the contact edge where the initial crack occurs, based on the numerical analysis results with the use of finite element method (FEM) program ABAQUS. It is proposed that all the effect of test conditions can be contained by the local stress field, which would dominate the fatigue crack initiation and propagation. By comparing with the experimental results, it was found that the initial fatigue crack should occur at the point of maximum shear stress range near the contact edge, and would propagate in the direction of maximum tangential stress range. An analytical simulation of fretting fatigue crack propagation has been carried out. It was found that a fatigue crack was always under the mixed mode conditions, the fracture path could be estimated by the maximum tangential stress theory (???max), and the propagation curve could be characterized by the stress intensity factor range in this direction ( ?K??max).
Download or read book Fretting Fatigue Crack Nucleation Criterion for Ti 6Al 4V written by S. Mall and published by . This book was released on 2003 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting fatigue crack nucleation behavior in titanium alloy Ti-6A1-4V was investigated by using two contact configurations: cylinder or flat with rounded edge pad on flat substrate. Both experiments and finite element analyses were conducted. A muiltiaxial fatigue parameter involving shear stress and normal stress on the critical plane was examined about its capability to predict the number of cycles to fretting fatigue crack initiation, crack initiation location and crack orientation angle along the contact surface. Also, the effects of two factors, crack nucleation process volume and coefficient of friction, on predictions were investigated.
Download or read book An Investigation of Fretting Fatigue Crack Nucleation Life of Ti 6Al 4V Under Flat on Flat Contact written by T. Nicholas and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to investigate fretting fatigue damage of Ti-6Al-4V against Ti-6Al-4V under flat-on-flat contact with blending radii at room temperature. Both the location of and the time required to nucleate fretting fatigue cracks were investigated for two static clamping stress values representative of those estimated for turbine engine blade attachments. Fatigue limit stresses for a 107 cycle fatigue life were evaluated for the selected conditions. Fretting fatigue nucleated cracks were identified in situ using shear wave ultrasonic NDI. The effect of fretting fatigue on uniaxial fatigue life was quantified by interrupting fretting fatigue tests at 10% of life, and conducting uniaxial residual fatigue life tests. Metallography, scanning electron microscopy and spectral analysis were used to characterize the fretting damage.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Fretting Fatigue Process Volume Using Finite Element Analysis written by DR. Swalla and published by . This book was released on 2003 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting fatigue damage is characterized by the nucleation of cracks very early in the life of a component along a critical plane at an oblique angle to the contact surface. The number of cycles to fretting fatigue crack nucleation as well as the orientation of the initial crack critical plane is strongly influenced by the large stress and strain gradients that occur within a small volume near the fretting contact. Therefore, it is necessary to average the stresses and strains along a critical plane within a fretting fatigue process volume (FFPV) to obtain more reliable crack nucleation predictions. An approach for computing damage in a FFPV using finite element analysis is presented. The life and crack angle prediction is consistent with experimental observations of fretting fatigue tests on PH 13-8 Mo stainless steel. This averaging method allows for the introduction of a length scale for crack nucleation prediction.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Characteristics of Fatigue Crack Initiation and Growth in Three Alloys with an Approach to Design written by Ronald W. Stepian and published by . This book was released on 1974 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue strength and microscopic fatigue crack initiation in Ti 6Al 4V alloy written by Shinichi Nishida and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Orthopedic Biomaterials written by Bingyun Li and published by Springer. This book was released on 2018-08-17 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest progress in the biology and manufacturing of orthopedic biomaterials, as well as key industry perspectives. Topics covered include the development of biomaterial-based medical products for orthopedic applications, anti-infection technologies for orthopedic implants, additive manufacturing of orthopedic implants, and more. This is an ideal book for graduate students, researchers and professionals working with orthopedic biomaterials and tissue engineering. This book also: Provides an industry perspective on technologies to prevent orthopedic implant related infection Thoroughly covers how to modulate innate inflammatory reactions in the application of orthopedic biomaterials Details the state-of-the-art research on 3D printed porous bone constructs
Download or read book On the Process of Subsurface Fatigue Crack Initiation in TI 6AL 4V written by James Alfred Ruppen and published by . This book was released on 1978 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
