FORCES ACTING BETWEEN TOWING VEHICLES (TRACTORS) AND LIGHT-WEIGHT TRAILERS (UP TO 3500 KG)

UNTERSUCHUNGEN UEBER DIE WIRKENDEN KRAEFTE ZWISCHEN ZUGFAHRZEUGEN UND LEICHTEN ANHAENGERN (BIS 3500 KG)

HITHERTO IN GERMANY, TESTING OF THE DURABILITY OF LINKAGES BETWEEN VEHICLES HAS BEEN CARRIED OUT ON THE TEST RIG WITH FORCE MAGNITUDE +- 0.6 D (D = D VALUE) AND THE LINE OF ACTING FORCE DEPENDENT ON THE LOAD SUPPORTED. IN CONTRAST TO THIS, ISO HAS ESTABLISHED DURABILITY TESTING WITH FORCE MAGNITUDE +- 0.5 D AND LINE OF ACTING FORCE 20 DEGREES FORWARDS AND DOWNWARDS. IN COMMON MARKET PAPERS THE ISO METHOD MAY BE CONSIDERED FOR LEGISLATION. THE AIMS OF THE STUDY ARE TO FIND OUT WHETHER THE ISO RECOMMENDATION CAN REPLACE THE GERMAN PROCEDURE, AND TO WORK OUT GERMAN PROPOSALS FOR COMMON MARKET LEGISLATION. TAKING ACCOUNT OF CARRIAGEWAY AND OPERATING CONDITIONS AND VARYING WEIGHTS OF TRACTORS AND TRAILERS, THE FORCES IN THE LINKAGES ARE TO BE MEASURED BY MEANS OF THE GERMAN PROCEDURE. TESTS ON RIGS WILL SUPPLEMENT THE STUDIES.