Tritum Sermone Proverbium; Kleine Diebe Hangt Man, Die Grossen Lasst Man Lauffen, Strafft Man Im Beutel
2 Angebote vergleichen
Bester Preis: € 15,55 (vom 06.08.2015)1
Symbolbild
Tritum Sermone Proverbium Kleine Diebe Hangt Man, Die Grossen Lasst Man Lauffen, Strafft Man Im Beutel (2002)
EN PB NWISBN: 9781234276638 bzw. 1234276631, in Englisch, RareBooksClub, Taschenbuch, neu.
Von Händler/Antiquariat, BuySomeBooks [52360437], Las Vegas, NV, U.S.A.
This item is printed on demand. Paperback. 26 pages. Original publisher: Cleveland, Ohio : National Aeronautics and Space Administration, Glenn Research Center ; Hanover, MD : Available from NASA Center for Aerospace Information, 2002 OCLC Number: (OCoLC)55975012 Excerpt: . . . where is a parameter associated with elastic modulus, hardness, indent crack geometry and fracture resistance. The parameter represents the degree of fracture resistance ( R-curve ) as defined in 22 K c ( 3 ) R K c where is fracture resistance, is the crack size, and is a parameter. Equation 2 is a common R expression of rising R-curve behavior for ceramic materials. When 0, the case reduces to a flat-1 3 P K K R-curve such that and . R-curve behavior of a brittle material can be if R IC estimated based on Equation ( 3 ) by determining the parameter from ( the slope of ) the indent vs strength. indent load data ( such as Figure 9 ) and then using this value to determine the parameter using a known value of fracture toughness ( obtained by, for example, SEPB ) c evaluated with the particular precrack size ( ) used. The resulting R-curve behavior thus estimated for AS800 and SN282 is shown in Figure 10. The previously determined R-curve of NC132 silicon nitride 15 is also included in the figure. AS800 exhibits not only greater fracture toughness but also stronger R-curve behavior than SN282, while the conventional, equiaxed fine-grained NC132 silicon nitride typically exhibits a flat R-curve and low fracture toughness. Analytical Considerations on Strength Degradation A phenomenological model of strength degradation due to ball impact was proposed previously by Wiederhorn and Lawn 1 , based on assumptions that the impact event was elastic and quasi-static and that strength degradation was attributed to a formation of cone cracks. Also, another important assumption was that the effective size of strength controlling flaws was proportional to the base radius of the cone 1, 5, 9 . The latt. . . This item ships from La Vergne,TN.
This item is printed on demand. Paperback. 26 pages. Original publisher: Cleveland, Ohio : National Aeronautics and Space Administration, Glenn Research Center ; Hanover, MD : Available from NASA Center for Aerospace Information, 2002 OCLC Number: (OCoLC)55975012 Excerpt: . . . where is a parameter associated with elastic modulus, hardness, indent crack geometry and fracture resistance. The parameter represents the degree of fracture resistance ( R-curve ) as defined in 22 K c ( 3 ) R K c where is fracture resistance, is the crack size, and is a parameter. Equation 2 is a common R expression of rising R-curve behavior for ceramic materials. When 0, the case reduces to a flat-1 3 P K K R-curve such that and . R-curve behavior of a brittle material can be if R IC estimated based on Equation ( 3 ) by determining the parameter from ( the slope of ) the indent vs strength. indent load data ( such as Figure 9 ) and then using this value to determine the parameter using a known value of fracture toughness ( obtained by, for example, SEPB ) c evaluated with the particular precrack size ( ) used. The resulting R-curve behavior thus estimated for AS800 and SN282 is shown in Figure 10. The previously determined R-curve of NC132 silicon nitride 15 is also included in the figure. AS800 exhibits not only greater fracture toughness but also stronger R-curve behavior than SN282, while the conventional, equiaxed fine-grained NC132 silicon nitride typically exhibits a flat R-curve and low fracture toughness. Analytical Considerations on Strength Degradation A phenomenological model of strength degradation due to ball impact was proposed previously by Wiederhorn and Lawn 1 , based on assumptions that the impact event was elastic and quasi-static and that strength degradation was attributed to a formation of cone cracks. Also, another important assumption was that the effective size of strength controlling flaws was proportional to the base radius of the cone 1, 5, 9 . The latt. . . This item ships from La Vergne,TN.
2
Tritum Sermone Proverbium; Kleine Diebe Hangt Man, Die Grossen Lasst Man Lauffen, Strafft Man Im Beutel
EN USISBN: 9781234276638 bzw. 1234276631, in Englisch, General Books LLC, General Books LLC, General Books LLC, gebraucht.
Lieferung aus: Vereinigte Staaten von Amerika, zzgl. Versandkosten, Free Shipping on eligible orders over $25.
U.S. Government, Johann Georg Fichtner, Paperback, English-language edition, Pub by General Books LLC.
U.S. Government, Johann Georg Fichtner, Paperback, English-language edition, Pub by General Books LLC.
Lade…