... the vibrations propagating into the road pavement and the related acoustic response (or acoustic signature) as a means to assess the structural health status. Indeed, monitoring this response can lead to an estimation of the road layer structural condition and an identification of cracks that occurred because...

... 12 04 2010 brick masonry mortar laboratory testing soil-structure scaling sand adjacent excavation cracks historic preservation non-cohesive soil References Schuring , J. S. , Scale Models in Engineering, Fundamentals and Applications , Pergamon Press , Oxford...

... to calculate the η pl factor from blunt-notched specimens was utilized. Standard C(T) and SE(B) specimens were prepared out of a 30-mm-thick, 2.25 Cr-1 Mo. ASTM A-387-Gr22 type steel plate. The crack lengths considered ranged from 55% to 75% of the specimen width W , and three sets of specimens were prepared...

...JF Murphy A test specimen and equation are demonstrated to measure critical Mode II stress-intensity factor K IIc for wood. Knowledge of this critical material property is necessary for predicting crack propagation loads and, specifically, split propagation loads in split wood beams. Results...

...U Eisele; E Roos; H Silcher; C Zimmermann This paper is concerned with the method of crack length controlled prefatiguing of notched round tension specimens. Since a direct optical analysis of the crack length in the present specimen is not possible, the change in the specimen stiffness is used...

... and microcrystallographyof fractographic features. KEYWORD: photogrammetric methods, cracks, crystallography, corrosion, electron channeling pattern analysis, etch-pit characterization, crack-feature replication, trace analysis A large number of metals and alloys exhibits a transgranular mode of environment-assisted...

... transition (NDT), and room temperature, air environment fatigue crack growth rate (FCGR) tests were also performed. From a dynamic fracture toughness as well as FCGR standpoint, SA508 Cl 3a steel can be considered as an acceptable alternative to the more commonly used SA508 Cl 2a pressure vessel steel...

... of 50°, a characteristic ring-like damage pattern on the surface was recognized. To explain the experimental results, a new erosion mechanism based on the initiation and propagation of transverse cracks beneath the surface at the tip of longitudinal cracks was introduced. And by this mechanism...

... crack growth resistance R curve test for elastic-plastic fracture toughness J Ic determination are compared. Various formulations for plane-strain fracture toughness K Ic and J Ic estimation are also compared. Comparison of the test methods indicates that, for ductile steels, the multiple identical...

...YW Mai The use of surface-crack specimens subjected to tension and bending loads for the fracture toughness evaluation of two typical polymers, polypropylene and polystyrene, is described. Experimental results are discussed with particular reference to various correction factors such as slow growth...

...TW Orange This paper is a report of ASTM Task Group E24.01.05 on Part-Through Crack Testing. It includes recommendations for the design, preparation, and static fracture testing of surface crack specimens based on the current state of the art. The recommendations are preceded by background...

...DL McLellan; UG Goranson The failure load characteristics of finite width strips containing eccentrically located collinear cracks have been determined for a variety of crack combinations. In addition to single cracks, the three cases of two edge cracks of unequal lengths, one edge crack with one...

...JC Kennedy; WE Woodmansee Signal averaging has been used to improve the clarity of flaw indications in an electron beam weld. The delay of an electronic gate has been synchronized to the transducer motion to improve the detectability of a tight interface crack in a tensile specimen. Cross...

...LA Simpson; TR Hsu; G Merrett There is a need for easy-to-fabricate fracture toughness specimens for ceramics. The single-edge notched beam satisfies this need, except that the American Society for Testing and Materials (ASTM) specification for notch root crack depth is difficult to achieve...

...JN Kass; JA Begley; H Andrejasik A fractographic study of crack extension in plane strain, fully plastic Zircaloy® was conducted. Three specimen geometries were studied: double-edge notched, compact tension, and center notched specimens. Slip line solutions for these geometries predict high...

... and consistent code specifications. Bayes theorem cracks fatigue flaws fracture inspection NDT method probability theory reliability statistical analysis welding References Madison , R. B. and Irwin , G. R. , “ Fracture Analysis of King's Bridge, Melbourne ,” Journal...