...Thomas Bouchenot; Kirtan Patel; Ali P. Gordon; Sachin Shinde While industrial gas turbine blades are commonly designed to resist creep and high-cycle fatigue (HCF) failure, the combination of these two loading conditions is seldom considered. The effect of creep damage elicited prior or concurrent...

... for the extension of the method to cover anisotropic yield surface materials. The application is carried out on steel tubes that have been axially compressed beforehand to create a bulge that acts as a stress concentration factor during the fatigue loading process. The ALO method is compared to the reference finite...

.... A thorough understanding of Fe–Co–2V’s fatigue performance is required to predict mechanical reliability under operating loads; however, limited fatigue data currently exist for Fe–Co alloys. This work characterizes the fatigue properties of wrought Fe–Co–2V through strain-controlled fatigue testing...

... did not exhibit any significant grain growth and demonstrated an increase in the average Vickers hardness in the repair compared with the wrought 7075-T651 control. Tensile and fatigue behavior was investigated for heat-treated repair and compared with the wrought AA7075-T651 control. The heat-treated...

..., fatigue, creep, and creep-fatigue tests at temperatures 550 to 760 ∘ C . The test results, failure mechanisms, and microstructures of diffusion bonded Alloy 800H are scrutinized and presented. Two sites are selected on the rupture surface creep-fatigue specimen tested at 650 ∘ C...

...Sha Xu; Hao Chen; Yali Yang; Kun Gao Three-dimensional (3D) reconstruction and finite element method are combined to study the damage behavior of aluminum alloy resistance spot-welded joints. Fatigue damage of spot-welded joints under different cyclic loading stages was obtained by X-ray...

... thermomechanical fatigue (TMF), a temperature-dependent crystal viscoplasticity (CVP) constitutive model is extended to include the effects of aging. The influence of aging in the CVP framework is captured through the addition of internal state variables that measure the widening of the γ channels and in-turn...

...Thomas Bouchenot; Calvin Cole; Ali P. Gordon; Casey Holycross; Ravi C. Penmetsa Next-generation, reusable hypersonic aircraft will be subjected to extreme environments that produce complex fatigue loads at high temperatures, reminiscent of the life-limiting thermal and mechanical loads present...

...Pham Quang Trung; Nay Win Khun; David Lee Butler Shot peening is well known as a surface deformation process which can induce compressive residual stresses into the subsurface of materials in order to improve the fatigue life. In this paper, the effects of the process conditions for both single...

...Renan L. Ribeiro; Michael R. Hill Cold expansion (CX) is a material processing technique that has been widely used in the aircraft industry to enhance fatigue life of structural components containing holes. CX introduces compressive hoop residual stresses that slow crack growth near the hole edge...

...: Huiling Duan. 06 06 2016 11 01 2017 Fatigue Fracture High-temperature creep Machining Materials processing Metals Polymers Ceramics Intermetallics Composites The aim of this study is the possibility of developing a rotor blade made of a TiAl intermetallic alloy, which...

...Ying Sun; George Z. Voyiadjis; Weiping Hu; Qingchun Meng; Yuanming Xu Hole cold expansion and bolt clamping force are usually applied to improve the fatigue performance of bolted joints. In order to investigate the effects of hole cold expansion and bolt clamping force and reveal the mechanism...

... of these materials. In this research, the microstructures of two cobalt-based Tribaloy alloys that are largely different in Si content are studied using scanning electron microscopy (SEM) with an EDAX energy dispersive X-ray (EDX) spectroscopy, and X-ray diffraction (XRD), fatigue strength under rotating-bending...

...Morteza Rahimi Abkenar; David P. Kihl; Majid T. Manzari Increasing interest in using aluminum as the structural component of light-weight structures, mechanical devices, and ships necessitates further investigations on fatigue life of aluminum alloys. The investigation reported here focuses...

...; however, the overall method is anticipated to remain the same. Comparison with experimental data and a common MLIH model demonstrates accurate simulated results for LCF, creep fatigue, and TMF for a single stabilized cycle. NLKH model parameters obtained from the developed method demonstrate better...

...M. Preciado; P. M. Bravo; D. Cárdenas The fatigue properties of high-pressure die-casting (HPDC) magnesium (Mg) alloys AZ91 exhibit a high variability, due primarily to the porosity that is inherent in the injection process. In the 94% of the studied samples, the porosity in which crack nucleation...

... to validate these claims. In this paper, two unified viscoplastic models (Miller and Walker) are experimentally validated for HX subjected to creep and 304SS subjected to strain-controlled low cycle fatigue (LCF). Both constitutive models are coded into ansys Mechanical as user-programmable features. Creep...

...Abir Bhattacharyya; Ghatu Subhash; Nagaraj Arakere; Bryan D. Allison; Bryan McCoy Microstructural and mechanical characterization investigations on three variants of a through-hardened M50 bearing steel are presented to compare and contrast their performances under rolling contact fatigue (RCF...

... the cooperative damaging effects of ultraviolet (UV), moisture, and cyclic loading on the structural integrity of carbon fiber reinforced vinyl-ester marine composite. Results demonstrate that UV and moisture can synergistically interact with fatigue damage mechanisms and accelerate fatigue damage accumulation...

...; published online June 15, 2015. Assoc. Editor: Tetsuya Ohashi. 19 04 2014 27 03 2015 15 06 2015 Fatigue analysis of a simply supported composite plate with laminate configuration of [0 n /90 n ] s under central patch impulse loading is presented using an analytical method...