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Showing 1 to 19 of 19 for “"Fracture and fatigue."”.
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Studies on the fracture and fatigue of wood
… of wood. This is particularly so in the field of fracture, which has relevance not only to the structural use of timber, but also to the important processes of machining and cutting. One of the reasons for this relative lack of knowledge concerning the fracture behaviour of wood, is that wood has …
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Fracture and Fatigue of a Self -Healing Polymer Composite Material
… experimental program is performed to assess the fatigue behavior of a self-healing polymer. The inherent fatigue characteristics of the material are measured. A fatigue-life-extension-based protocol is established for characterizing self-healing under a cyclic loading. Retardation and arrest of …
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The effect of nitrogen and inclusions on fracture and fatigue of steel.
… ageing behaviour of seven heats of C-Mn steel and an interstitial free steel has been examined from 20°C to 350°C, using slow strain rate tests (SSRT's) at strain rates of 2 x 10[-6] s[-1] and 2.67 x 10[-6] s[-1]. The steels were chemically analysed for the key elements, and additional …
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Effect of 3D stress states at crack front on deformation, fracture and fatigue phenomena
Theoretical, numerical and experimental studies involving elastic plate components, weakened by through-the-thickness cracks and subjected to loading parallel to the plane of the plate, are often based on plane stress or plane strain simplifications. These simplifications essentially reduce the …
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On the fracture and fatigue crack growth of thin sheets of nanocrystalline metal alloys
Fatigue crack growth was investigated in thin sheets of electrodeposited nickel–1.6% cobalt (Ni-Co) and rolled Inconel 718. Digital image correlation (DIC) was used to determine the crack opening displacement profiles, and the entire crack displacement fields. These parameters were then used to …
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Fracture and fatigue crack growth in 52100, M-50 and 18-4-1 bearing steels
… of Technology, Dept. of Materials Science and Engineering, 1979.
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The influence of alloy composition and interfacial segregants on the fracture and fatigue of metal/ceramic interfaces
… composites in the aircraft, automotive, and electronics industries is becoming more common as performance requirements exceed the capabilities of homogeneous materials. As a result, the need to assess their failure is critical. Diffusion bonded joints, thermal-barrier and wear resistant …
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Understanding the correlation between wrinkle morphology, fracture and fatigue of plain woven CFRP laminates through mechanical and ultrasonic characterization.
… (CFRP) laminates, can significantly alter the fracture and fatigue behavior of composite structures. This dissertation presents a comprehensive experimental investigation into the influence of out-of-plane wrinkles on interlaminar fracture toughness under both Mode I and Mode II loading …
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Multiscale Modeling of Fatigue and Fracture in Polycrystalline Metals, 3D Printed Metals, and Bio-inspired Materials
… a computational framework to study mechanical fatigue and fracture at different length scales for a broad range of materials. The developed multiscale framework is utilized to study the details of fracture and fatigue for the rolling contact in rails, additively manufactured alloys, and …
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Mechanism of subcritical crack growth in the alumina reinforced aluminum-copper composite: Effects of interface and matrix microstructure
Micromechanisms of fracture and fatigue crack growth were examined in an $\rm Al\sb2O\sb3/Al$-Cu composite and its matrix alloy, with particular emphases on effects of matrix and interfacial microstructure. The matrix and interfacial microstructures were controlled by aging the composite to …
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Mechanical Property Evolution and Thermal Remediation of Aluminum Magnesium 5xxx Alloys Following Low and Intermediate Temperature Thermal Exposure
… at temperatures of 60°C, 70°C, 80°C, 100°C, and 175°C. Room temperature hardness, tension and fatigue crack growth tests have been completed to determine changes in mechanical properties in the LT orientation. Longitudinal splitting in the short-transverse (ST) direction has been observed …
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High temperature fracture toughness and fatigue behavior of ti-zr-mo and w-re alloys for x-ray tube application
… the titanium-zirconium-molybdenum (TZM) alloy, and a surface layer in the bombarding region made of the tungsten-rhenium (W-Re) alloy. The target must endure extremely high temperature, associated with high thermal stress, and mechanical stress due to the centrifugal force induced by high speed …
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Systematic assessment of the influence of voids on the material performance and failure in additively manufactured polymers.
… significant improvement in the overall quality and functionality of the produced products. While the mechanical properties of FFF components are often influenced by print-to-print variability due to various factors, the presence of voids can significantly compromise structural integrity and …
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The Relationship Between the Osteonal Cement Line and Bone Strength
<p>Bone includes many structural and chemical components which provide both flexibility and strength. One such structure is the cement line, a 1-5 μm-thin structure located primarily in compact bone. Past research has correlated the pathological condition of “shin splints” with the micro-damage of …
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Fatigue and Fracture of Electron Beam Melting Ti-6Al-4V
… materials for a given design requires an understanding of critical properties, like fatigue and fracture, in addition to static mechanical and physical properties. With the ongoing advancements in metallic additive manufacturing techniques and the interest in applying the process to aerospace …
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The residual strength determination due to fatigue loading by fracture mechanics in notched composite materials
… with various layups, subjected to low frequency fatigue loading with constant amplitude at room temperature, by using a material modeling approach, fracture and fatigue mechanics and the finite element method (FEM). For simplicity, after thousands of cycles, the geometry of a circular hole of the …
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Theoretical and experimental modelling of multiple site damage in plate components.
Fracture and fatigue assessment of structures weakened by multiple site damage (MSD), such as two or more interacting cracks, currently represents a challenging problem. The lifetime prediction of structural components with MSD is still largely based on 2D single crack solutions available in …
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Development of a phenomenological constitutive model for fracture resistance degradation of asphalt concrete with damage growth due to repeated loading
… the asphalt concrete (AC) layer, such as joints and cracks in an underlying layer, induce higher stress concentration than the designed strength. Stress concentration in the vicinity of discontinuities accelerates distress on the AC layer. Repeated traffic and environmental loading applied to the …
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Self-healing of high temperature cured epoxy and composites
… structural fiber-reinforced polymeric composites and epoxy adhesives in aircraft, ships, vehicles, and wind turbine blades has increased markedly in the past decades. However, the polymeric matrix in these composites and adhesives typically consists of a brittle thermoset, which results in poor …