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تعداد نتایج: 157 فیلتر نتایج به سال:
INTRODUCTION Although bulk post-yield behavior of bone has been extensively reported in the literature, its underlying mechanism at ultrastructural level is still poorly understood. Lack of such knowledge has significantly hindered our understanding of age-related deterioration in bone quality. To address this issue, a mechanistic understanding of the post-yield behavior of bone becomes necessa...
Abstract Funding Acknowledgements Type of funding sources: Public grant(s) – National budget only. Main source(s): Instituto de Salud Carlos III, Sociedad Española Cardiología Background Aortic stiffness is a predictor incident cardiovascular events and mortality in the general population (1). Cardiovascular magnetic resonance (CMR) imaging allow to compute number parameters, such as pulse wave...
Calibrated models of aquifer-system compaction developed by Helm (1975, 1976, 1977, 1978) and by Williamson and others (1989) indicate that a narrow range of both aquitard inelastic skeletal specific storage values and aquitard elastic skeletal specific storage values have been used to successfully simulate aquifersystem compaction despite differences in depth, thickness, lithology, and stratig...
The deformation and failure behavior of an AM60 magnesium alloy was investigated using tensile test on circumferentially notched specimens with different notch radii. The strain and stress triaxiality corresponding to the failure point were evaluated using both analytical and finite element analyses. Combining with systematical observations of the fracture surfaces, it is concluded that deforma...
The fatigue behaviour of single lap bonded joints under fatigue loading was already investigated and a suitable life prediction model was presented and validated [1-2]. The model is based on the actual damage evolution under fatigue load: a crack initiation followed by its propagation up to a critical length [2, 3]. In the present paper the evolution of fatigue damage in single lap joints is ex...
The material assumptions made to facilitate Thermoelastic Stress Analysis (TSA) are linear elasticity, material homogeneity and isotropy, and mechanical properties that are independent of temperature. The unusual shape memory and superelastic properties of near equiatomic NiTi alloys complicate the application of any experimental stress analysis technique, and in the case of TSA, make these ass...
Material characterisation is often performed by uniaxial loaded cylindrical specimens. When the material in question is anisotropic in nature, the transverse behaviour of these specimens is recorded and analysed with respect to the material orientation to determine the relevant material properties for development of constitutive models. During low strain rate testing, measurements of the transv...
Flexural fatigue tests are typically run under displacement or in a straincontrolled mode. In these tests, either the oscillatory displacement amplitude or strain amplitude applied to the bottom of the specimen is kept constant. The evolution of loading required to cause fatigue is then measured. Load amplitude decreases with the number of cycles, and the specimen is considered to have failed w...
The combined isotropic-kinematic hardening model enables the description of cyclic transient elastic-plastic material behaviour steel. However, determination parameters and understanding their influence on response can be a challenging task. This study deals with individual steps calibration for simulation thin electrical steel sheets under loading. Specific recommendations are made kinematic i...
Recent advancements in high-density lubricants enable P/M steels to be processed to densities approaching 7.40 g/cm in a single compaction step using heated compaction tools via the AncorMax D process. This broadens the number of suitable applications for P/M steels, including high performance gears. However, in addition to high-density, the microstructural and mechanical property requirements ...
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