Warning: Table './science/sessions' is marked as crashed and should be repaired query: SELECT u.*, s.* FROM users u INNER JOIN sessions s ON u.uid = s.uid WHERE s.sid = 'vv38c9ghdd96a0fl6onajs22t1' in /var/www/html/science/science.uni-obuda.hu/includes/database.mysql.inc on line 135 Warning: Table './science/watchdog' is marked as crashed and should be repaired query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:173:\"Table './science/sessions' is marked as crashed and should be repaired\nquery: SELECT COUNT(sid) AS count FROM sessions WHERE timestamp >= 1781835895 AND uid = 0\";s:5:\"%file\";s:63:\"/var/www/html/science/science.uni-obuda.hu/includes/session.inc\";s:5:\"%line\";i:120;}', 3, '', 'http://science.uni-obuda.hu/node/1867', '', '216.73.216.140', 1781836795) in /var/www/html/science/science.uni-obuda.hu/includes/database.mysql.inc on line 135 Warning: Table './science/watchdog' is marked as crashed and should be repaired query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:184:\"Table './science/sessions' is marked as crashed and should be repaired\nquery: SELECT COUNT(DISTINCT s.uid) FROM sessions s WHERE s.timestamp >= 1781835895 AND s.uid > 0\";s:5:\"%file\";s:67:\"/var/www/html/science/science.uni-obuda.hu/modules/user/user.module\";s:5:\"%line\";i:776;}', 3, '', 'http://science.uni-obuda.hu/node/1867', '', '216.73.216.140', 1781836795) in /var/www/html/science/science.uni-obuda.hu/includes/database.mysql.inc on line 135 Warning: Table './science/watchdog' is marked as crashed and should be repaired query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:7:\"warning\";s:8:\"%message\";s:138:\"realpath(): open_basedir restriction in effect. File(/tmp) is not within the allowed path(s): (/var/www/html/science/science.uni-obuda.hu)\";s:5:\"%file\";s:60:\"/var/www/html/science/science.uni-obuda.hu/includes/file.inc\";s:5:\"%line\";i:200;}', 3, '', 'http://science.uni-obuda.hu/node/1867', '', '216.73.216.140', 1781836795) in /var/www/html/science/science.uni-obuda.hu/includes/database.mysql.inc on line 135 Warning: Table './science/watchdog' is marked as crashed and should be repaired query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:7:\"warning\";s:8:\"%message\";s:138:\"realpath(): open_basedir restriction in effect. File(/tmp) is not within the allowed path(s): (/var/www/html/science/science.uni-obuda.hu)\";s:5:\"%file\";s:60:\"/var/www/html/science/science.uni-obuda.hu/includes/file.inc\";s:5:\"%line\";i:200;}', 3, '', 'http://science.uni-obuda.hu/node/1867', '', '216.73.216.140', 1781836795) in /var/www/html/science/science.uni-obuda.hu/includes/database.mysql.inc on line 135 Three dimensional asperity analysis of worn surfaces | science.uni-obuda.hu
Ugrás a tartalomra

Three dimensional asperity analysis of worn surfaces

CímThree dimensional asperity analysis of worn surfaces
Közlemény típusaJournal Article
Kiadás éve2008
SzerzőkCzifra, Á., K. Váradi, and S. Horváth
FolyóiratMeccanica
Évfolyam43
Kötet6
Oldalszám601-609
Kiadás nyelveenglish
ISSN Number0025-6455
KulcsszavakAsperity, Micro-contact, Microtopography, Slicing method, Wear
Összefoglalás

An algorithm has been developed for the analysis of asperities of various types of machined surfaces, in order to characterize wear processes in the course of dry friction. Wear experiments and surface roughness measurements were performed to study the microtopographies of worn surfaces. Investigations extended to wear in the case of the non-lubricated ceramic-steel clutch and lubricated camshaft and bushing. A statistical analysis of asperities and scratches was completed with distribution curves to display the results. The peak angle, the rate of the major and minor axis and orientation were analyzed to characterize the shape of asperities and the overall characteristics of the surface.
Warning: Table './science/watchdog' is marked as crashed and should be repaired query: INSERT INTO watchdog (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (0, 'php', '%message in %file on line %line.', 'a:4:{s:6:\"%error\";s:12:\"user warning\";s:8:\"%message\";s:264:\"Table './science/sessions' is marked as crashed and should be repaired\nquery: UPDATE sessions SET uid = 0, cache = 0, hostname = '216.73.216.140', session = '', timestamp = 1781836795 WHERE sid = 'vv38c9ghdd96a0fl6onajs22t1'\";s:5:\"%file\";s:63:\"/var/www/html/science/science.uni-obuda.hu/includes/session.inc\";s:5:\"%line\";i:69;}', 3, '', 'http://science.uni-obuda.hu/node/1867', '', '216.73.216.140', 1781836795) in /var/www/html/science/science.uni-obuda.hu/includes/database.mysql.inc on line 135