1、 GMDAT ENGINEERING STANDARDS Test Procedures Chassis SUPERCEDED EDS-T-2705 J-Car Rear Transmission Mounts Fatigue Test This standard may be applied only for current project (incl. 200 Series). It is Superceded for all future projects and replaced by GMW14116. J-Car Rear Transmission Mounts Fatigue T
2、est Note: 8 E:48t G8 =9 (200 SeriesE F ) 7 FF7 957%L+ , FG P-P Program .Bd# GMW14116 ) $4=F7 957F$ . Copyright 2010 General Motors Company All Rights Reserved November 2010 Originating Department: GMDAT Engineering Standards Page 1 of 2 Version : 4 1 Introduction Note: Nothing in this standard super
3、sedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpose. To determine the fatigue life of the product population by specifying laboratory fatigue test procedures for the engine and transmiss
4、ion mounts. 1.2 Applicability. This standard applies to the laboratory fatigue test of all engine and transmission mounts fitted to J100 & J150 in section 3.2 below. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications
5、. None. 2.2 GM Standards/Specifications. None. 3 Test Requirements 3.1 Test Equipment Must Consist of the Following. 3.1.1 Hydraulic Supply. 3.1.2 Double Acting Hydraulic Actuator capable of applying load in the range +/- 10.0 kN and with a stroke not less than 50.0 mm. 3.1.3 10.0 kN Tension/Compres
6、sion Load Cell. 3.1.4 Displacement Transducer. 3.1.5 Single Channel PIDF Servocontroller with AC and DC signal conditioning. 3.1.6 Fixturing suitable to locate the component and test equipment such that loading is in the direction specified on component drawing. 3.2 Parts Applicable. 96308813 BRKT A
7、-TRANS MTG, REAR 96308100 BRKT A-TRANS MTG, REAR 96300692 BRKT A-TRANS MTG, REAR J150 96271523 BRKT A-TRANS MTG, REAR 4 Test Conditions 4.1 Procedure. 4.1.1 Ensure that the load cell and LVDT and correctly calibrated. The test is run in load control and the displacement amplitude is monitored to ens
8、ure that the test component can sustain the load applied. GMDAT ENGINEERING STANDARDS EDS-T-2705 Copyright 2010 General Motors All Company Rights Reserved November 2010 Page 2 of 2 Version : 4 4.1.2 Regular inspections of the components must be conducted throughout the running of the test. In the ev
9、ent that any condition which meets the failure criteria specified in section 5 is noted, the test is stopped and the component deemed to have failed. 4.2 Test Cycles. For the F16 MT bracket, part number 96308813: In X - direction Force Fx = +/- 4.0 kN Cycles Nx = 200,000. In Z - direction Force Fz =
10、 +/- 3.0 kN Cycles Nz = 250,000. For the ZF AT bracket, part number 96300692: In X - direction Force Fx = +/- 2.5 kN Cycles Nx = 150,000. In Z - direction Force Fz = +/- 1.0 kN Cycles Nz = 250,000. For the GMPT AT bracket, part number 96308100: In X - direction Force Fx = +/- 4.5 kN Cycles Nx = 500,
11、000. In Z - direction Force Fz = +/- 1.5 kN Cycles Nz = 300,000. For the J150 ZF16 AT bracket, part number 96271523: In X - direction Force Fx = +/- 2.5 kN Cycles Nx = 150,000. In Z - direction Force Fz = +/- 1.0 kN Cycles Nz = 250,000. Excitation Frequency = 20.0 +/- 5.0 Hz sine wave. Where the x-d
12、irection is defined as the horizontal axis front to rear. The y-direction is defined as the horizontal axis left to right and the z-direction is the vertical axis relative to the installed position of the component on the vehicle. 5 Performance 5.1 Each specimen in the sample is required to complete
13、 the number of cycles specified above without failure. 5.2 Failure is deemed to have occurred if a fatigue crack is seen in any location or if the component can no longer sustain the test load. 5.3 Normal sample size is 6. 6 Notes 6.1 Glossary. Not applicable. 6.2 Acronyms, Abbreviations, and Symbol
14、s. Not applicable. 7 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: EDS-T-2705 8 Release and Revisions This standard was originated in October 1996. It was first approved by GMDAT Engineering Standards in October 1996. It was first published in October 1996. Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 4 NOV 2010 Superceded (Chassis Subsystem Validation Team) / F9I957 =* (24 .E D4D4 )
