整车与零部件耐久试验技术.ppt

Durability Test Technology for Ground Vehicles and Components Course Outline Introduction Durability Testing Objectives/Process Assessment of Service Conditions Transducers Data Digitization Laboratory Reproduction of Service Conditions Fixturing Servohydraulic Test Systems Programming of Test Systems Test Excitation Servocontrollers Command Compensation Techniques Metrics Test Correlation Fatigue Analysis Durability Testing Objectives Durability tests are conducted on components, systems, and full vehicles to gain information about their likely response, over an extended period of time, to likely service conditions. Key Phrases: Components, Systems, and Full Vehicles Information Gained from Test Likely Response Likely Service Conditions Extended Period of Time Durability Testing Objectives Components, Systems, Full Vehicles What is the specimen? Durability Testing Objectives Components, Systems, Full Vehicles What is the specimen? Accelerated Component Development Cycle Accelerated New Vehicle Development Cycle Durability Testing Objectives Information Gained from Test Durability Testing Objectives Information Gained from Test Durability Testing Objectives Information Gained from Test Durability Testing Objectives Likely Response of Specimen Durability Testing Objectives Likely Service Conditions Durability Testing Objectives Failure occurs after extended period of time. Durability Testing Objectives Failure occurs after extended period of time. Durability Testing Process Assessment of Service Conditions Where and how is the part “loaded” in the field? Conditions Reproduced in Laboratory Which “loads” will be reproduced in the lab? Programming What sequence of loads will be applied in the lab? Metrics How effective was the test? 1. Assessment of Service Conditions How is the part loaded in the field? Mechanical, thermal, chemical loading Use of Proving Grounds Service/Proving Ground Relationships Driving surface conditions Driver conditions Road Load Data A