Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 63 for “"Notches"”.
-
Predicting strength of wood beams with tension end notches
… the strength of wood beams with tension end notches (TEN) was derived using a critical fillet hoop stress (CFHS) theory. The equation is a simplified description of the results of hundreds of finite element (FE) analyses of TEN beams with varied geometries (total of 690 configurations). It …
-
A model for the long-life fatigue behavior of small notches
The effect of notches and intrinsic defects on the long-life regime fatigue properties was studied. A crack-closure-at-a-notch (termed CCN) model for predicting the fatigue life and fatigue threshold stress was developed based on the assumption that the da/dN vs. $\Delta$K$\sb{\rm eff}$ relation is …
-
Sacral preauricular extensions and notches and dorsal pubic pitting as indicators of parity
… extensions (SPE), sacral preauricular notches (SPN), and dorsal pubic pitting (DPP) on the sacra and pubic bones of modern assigned females at birth (AFAB; parous=150; non-parous=97) and assigned males at birth (AMAB; n=150) from the University of Tennessee, Knoxville’s Donated Skeletal …
-
Drag Forces of Two-Dimensional v-Shaped Notches in Transonic and Supersonic Turbulent Flow
Made available in DSpace on 2014-12-09T17:13:40Z (GMT). No. of bitstreams: 1 6711869.pdf: 5042576 bytes, checksum: ad8ebd9afe5c4c9bfda2cabe5115eff7 (MD5) Previous issue date: 1967
-
Approximate Determination of Stresses Near Notches and Corners in Elasticmedia by an Integral Equation Method
Made available in DSpace on 2014-12-10T22:21:39Z (GMT). No. of bitstreams: 1 7206862.pdf: 2780428 bytes, checksum: 517fb0b1972b5e65c126ffd07f198267 (MD5) Previous issue date: 1971
-
Notched strength analysis of tensile specimens taken from a thick, filament-wound graphite/epoxy pressure vessel
… coupons with various semi-elliptical surface notches. The strength of specimens with small notches was found to be notch insensitive. The strength of specimens with larger notches depended on the size of the notch. The fracture toughness of the laminate was found by applying a general …
-
Aerodynamic Drag of Two-Dimensional Rectangular Notches in Transonic and Supersonic Turbulent Flow (With Emphasis on the Effects of Self-Induced Pressure Oscillations)
Made available in DSpace on 2014-12-09T17:13:50Z (GMT). No. of bitstreams: 1 7013412.pdf: 3430944 bytes, checksum: d410c0b4d782784ac4bba540c211ee5b (MD5) Previous issue date: 1969
-
Evaluating the Fracture Potential of Steel Moment Connections with Defects and Repairs
… to the flanges. The repairs were 0.125 in. deep notches ground to a smooth taper and 0.25 in. deep notches ground to a smooth taper, welded, and ground smooth. The defects were sharp 0.25 in. and 0.375 in. notches. In addition, 54 bend tests were conducted on beam flange and bar stock coupons …
-
Concentração de tensões em entalhes-U
… concentration factor in the root of U-shaped notches in thin plates with their increasing depth is studied on the basis of empirically derived formulae found in the literature on the subject. It is considered that the plates are under in-plane loads causing simple tension or pure bending and …
-
Effect of flaw shape and penetrating fluids on hydraulic fracture initiation and propagation in porous material (gypsum)
… vertical flaw, and 5 mm circular flaw with short notches (2.5 mm length), and with long notches (5 mm length). A special case of a circle with very long notches (15 mm) was also tested. Moreover, in some specimens, the circular flaw and single vertical flaw were internally sealed with wax in order …
-
The effect of stringer design and leading-edge design on the strength characteristics of wooden pallets
… notched with six different fillet radii. These notches were cut with a band-saw or a stringer-notcher. Attempts were made to reduce the incidence of stringer fracture between the notches (a) by nail-reinforcing the stringers adjacent to the inner notch ends and (b) by retarding longitudinal …
-
Αστοχία ρηγματομένων όλκιμων πλακών με δύο συμμετρικές εγκοπές
… between a crack and two symmetrical edge notches perpendicular to the plane of the crack. Based on the strain energy density criterion the critical stress for crack growth initiation is determined. The influence of body geometry as it is dictated by notch radius, crack length and distance …
-
Spectral Cohabitation and Interference Mitigation via Physical Radar Emissions
… while also readily incorporating agile spectral notches. The first method of spectral cohabitation uses these spectral notches to avoid narrow-band RF interference (RFI) in the form of other spectrum users residing in the same band as the radar system, allowing both to operate while minimizing …
-
Embrittlement and Flow Localization of Reactor Structural Materials
… flow localization problems with components with notches or stress concentrators.
-
Development of Residual Stress Measurement for Concrete Pavements through Cantilevered Beam Testing
… beams and also introduced a method using notches. Strain gages on each beam measured the strain relaxation due to a core ring, one notch, or many notches. Strain relaxation was clearly seen in the core ring and notch beam tests, and this relaxation was most pronounced with the notch tests. …
-
An investigation of residual stresses in simulated wing panels of 7075-T6 aluminum.
… measurements of residual stresses at notches in simulated wing panels of 7075-T6 aluminum and to establish the relationships between the local stresses, residual stresses, and the far-field or applied stress. The stress concentration factors were found to decrease with increased …
-
A crack closure model for the fatigue behavior of notched components and welded joints
… crack-closure behavior of cracks emanating from notches. The results obtained using this crack-tip plastic deformation model showed that the estimated effective stress-intensity ratio $U(a)$ (=$\Delta K\sb{\rm eff}(a)/\Delta K(a))$ does not exhibit the commonly observed ""dip"" caused by the …
-
EFFECT OF WELD-TOE GRINDING ON FATIGUE LIFE BASED ON THEORY OF CRITICAL DISTANCE
… the influence of local geometries and notches to evaluate the fatigue stresses in real welded components. With the adoption of the theory of critical distance, the calculated stress is closer to the maximum principal stress of the weld toe determined by the finite element analysis, …
-
Fatigue behavior of notched carbon epoxy laminates during reversed cyclic loads
… central hole and opposing semi-circular edge notches, were used to obtain a fundamental understanding of the fatigue effect in specimens under low and high cycle lifetimes. Damage was evaluated with penetrant-enhanced X-ray radiography and Iaminate deply. Tensile and compressive residual …
Page 1 of 4