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Observation and modeling of potential sub-threshold damage growth mechanism for nitinol in ultra-high cycle fatigue [0.03%] 镍钛诺材料超长寿命疲劳损伤潜在演化机制的表征与解析
Andrew Roiko,Scott Cook,Brian Berg et al. Andrew Roiko et al.
Fatigue fracture of small nitinol components commonly used in medical devices is currently dominated by the initiation and/or growth of small cracks at non-metallic inclusions preceding conventional fatigue crack growth. Therefore, an under...
Modelling the test methods used to determine material compatibility for hydrogen pressure vessel service [0.03%] 用于氢气压力容器服务的材料相容性测试方法的建模
Christopher P Looney,Zachary M Hagan,Matthew J Connolly et al. Christopher P Looney et al.
This work aims to create finite element models to simulate the three ISO 11114-4 test methods applicable to hydrogen gas cylinders, coupled with calibrated constitutive models, to predict the deformation response of each. Experimental measu...
On the influence of test speed and environment in the fatigue life of small diameter nitinol and stainless steel wire [0.03%] 关于测试速度和环境对镍钛合金和不锈钢细丝疲劳寿命的影响研究
J D Weaver,G M Sena,W M Falk et al. J D Weaver et al.
To better understand the complex interplay of speed and environment on metals commonly used in implants, rotary bend fatigue tests were conducted on stainless steel and nitinol wires. A range of alternating strains was tested to create ε-N...
I V Gadolina,N A Makhutov,A V Erpalov I V Gadolina
In this paper, the authors want to draw readers' attention to one long-standing question: which approach is preferable for estimation longevities in fatigue problem, the time domain approach (Rainflow) or the frequency domain one (Dirlik an...
The effect of build orientation on both flexural quasi-static and fatigue behaviours of filament deposited PA6 polymer [0.03%] 构建方向对沉积丝PA6聚合物的弯曲准静态和疲劳行为的影响研究
S Terekhina,T Tarasova,S Egorov et al. S Terekhina et al.
The present paper aims to study the effect of manufacturing build orientation on both flexural quasi-static and fatigue behaviours of semi-crystalline polyamide 6 obtained by Fused Filament Fabrication (FFF), by considering the porosity and...
Investigation of the mechanisms by which hot isostatic pressing improves the fatigue performance of powder bed fused Ti-6Al-4V [0.03%] 热等静压改善粉末床熔化Ti-6Al-4V疲劳性能的机制研究
P Li,D H Warner,J W Pegues et al. P Li et al.
Hot isostatic pressing (HIP) is often needed to obtain powder bed fused (PBF) Ti-6Al-4V parts with good fatigue performance. This manuscript attempts to clarify the mechanisms through which HIP treatment acts to improve high cycle fatigue p...
D Arola,D Bajaj,J Ivancik et al. D Arola et al.
The fatigue and fracture behavior of hard tissues are topics of considerable interest today. This special group of organic materials comprises the highly mineralized and load-bearing tissues of the human body, and includes bone, cementum, d...
Fatigue failure in the cement mantle of a simplified acetabular replacement model [0.03%] 简化髋臼置换模型水泥层的疲劳失效
Nikolaus P Zant,Charles K Y Wong,Jie Tong Nikolaus P Zant
Although the role of fatigue failure in aseptic loosening of cemented total hip replacements has been extensively studied in femoral components, studies of fatigue failure in cement mantle of acetabular replacements have yet to be reported,...
J Tong,N P Zant,J-Y Wang et al. J Tong et al.
The long-term stability of cemented total hip replacements critically depends on the lasting integrity of the bond between the cement and the bone, often referred to as fixation. In vitro assessment of fatigue behaviour of cemented acetabul...
Deepak Vashishth Deepak Vashishth
Microdamage formation is a critical determinant of bone fracture and the nature and type of damage formed in bone depends on the interaction of its extracellular matrix (ECM) with the applied loading. More importantly, because bone is a hie...