where Su is ultimate tensile strength, εf is true fracture strain, σf true fracture stress, and b and c are material constants. In terms of the characteristic slopes (Equation [1.12b]) the value of fatigue life at which the transition from low cycle (plastic) to high cycle (elastic) ...
777 MPa is the initial value of local stress concentration that was calculated, if mainly taking into account the AVG-porosity of 2.7%, overall yield strength of 855 MPa in MIM Ti-Nb-Zr and the localized CIA-porosity of 11.6%, when only these key factors were taken into consideration. Eve...
The relationship between stiffness degradation rate and fibre volume fraction, was observed, and the influence of volume fraction on the tensile strength was also investigated. The results show that, as the volume fraction increases the stiffness degradation rate initially decreases and then increases ...
The results of the test program demonstrated that there is no correlation between material strength and the fatigue crack growth rate (FCGR) [10], unlike results observed with monotonically increasing loading such as tensile strength testing and measurement of fracture toughness [2, 11, 12]. Fatig...
Fatigue Fatigue is the failure mechanism that is caused by repeated load cycles with amplitudes well below the ultimate static material strength. Formally, the fatigue process is divided into three stages: crack initiation, crack propagation, unstable rupture and final fracture. A repeated load ...
The advantage of this model is that it does not require any substantial knowledge of the fatigue material data, since the two required points can be related to T H E O R Y F O R T H E F A T I G U E I N T E R F A C E | 53 the ultimate tensile strength. Although it ...
The poor intergranular corrosion resistance of the alloy is attributed to the low corrosion potential and high volume fraction(29.6%) of(Al+Mg2Si) eutectic region. Considerable hydrogen concentration, which is created by the electrochemical reaction and the dissolution of Mg2Si dendrite, results in...
A comparison of the bump shear strength for both this alloy as well as silver-filled epoxy bumps having different interconnection areas. 2 Interconnect Ave. Bump Dimension Interconnect Shear Ave. Shear Bump Height (μm) (μm) Area (μm)2 Load (gf) Stress gf/(μm)2 Sn—Ag— 95-100 ...
Fatigue is the degradation of the material strength (or mechanical properties in general) as a function of the number of loading cycles or the loading duration. In the context of polymers, fatigue failure can then be categorized as static and dynamic, where the former is associated with creep ...
The membrane element has negligible stiffness and strength, and therefore does not affect the mechanical behavior of the specimen. Displacement boundary conditions move the end tabs towards each other without applying any torque to the end tabs, thereby causing bending deformation of the gauge section...