Reliability in Automotive and Mechanical Engineering: Determination of Component and System Reliability

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Springer Science & Business Media, Apr 30, 2008 - Technology & Engineering - 500 pages
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Defects generate a great economic problem for suppliers who are faced with increased duties. Customers expect increased efficiency and dependability of technical product of - also growing - complexity. The authors give an introduction to a theory of dependability for engineers. The book may serve as a reference book as well, enhancing the knowledge of the specialists and giving a lot of theoretical background and practical information, especially on the dependability analysis of whole systems.

The theory, concepts and approaches are well explained by examples and solutions. The topics include: Mathematical basis, Life span distributions, System dependability theory, Failure mode and effects analysis (FMEA), Fault tree analysis, Dependability test planning, Test evaluation, Calculation of repairable systems, Dependability protection programs.

 

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Contents

Introduction
1
Fundamentals of Statistics and Probability Theory
7
21 Fundamentals in Statistics and Probability Theory
9
212 Statistical Values
28
213 Reliability Parameters
30
214 Definition of Probability
33
22 Lifetime Distributions for Reliability Description
35
221 Normal Distribution
36
662 Regression Analysis
243
663 Maximum Likelihood Method
247
67 Exercises to Assessment of Lifetime Tests
251
Weibull Parameters for Specifically Selected Machine Components
255
71 Shape Parameter b
256
72 Characteristic Lifetime T
259
73 Failure Free Time t0 and Factor ftB
262
Methods for Reliability Test Planning
264

222 Exponential Distribution
38
223 Weibull Distribution
40
224 Logarithmic Normal Distribution
55
225 Further Distributions
57
23 Calculation of System Reliability with the Boolean Theory
70
24 Exercises to Lifetime Distributions
76
25 Exercises to System Calculations
79
Reliability Analysis of a Transmission
84
31 System Analysis
86
312 Determination of System Elements
88
314 Determination of the Reliability Structure
89
32 Determination of the Reliability of System Elements
90
33 Calculation of the System Reliability
93
FMEA Failure Mode and Effects Analysis
98
41 Basic Principles and General Fundamentals of FMEA Methodology
100
42 FMEA according to VDA 86 Form FMEA
103
43 Example of a Design FMEA according to VDA 86
109
44 FMEA according to VDA 42
113
System Elements and System Structure
120
Functions and Function Structure
123
Failure Analysis
126
Risk Assessment
133
Optimization
140
45 Example of a System FMEA Product according to VDA 42
144
Functions and Function Structure of the Adapting Transmission
148
Failure Functions and Failure Function Structure of the Adapting Transmission
149
Optimization of the Adapting Transmission
151
46 Example of a System FMEA Process according to VDA 42
152
System Elements and System Structure for the Manufacturing Process of the Output Shaft
153
Functions and Function Structure for the Manufacturing Process of the Output Shaft
154
Failure Functions and Failure Function Structure for the Manufacturing Process of the Output Shaft
156
Fault Tree Analysis FTA
160
51 General Procedure of the FTA
161
512 Symbolism
162
52 Qualitative Fault Tree Analysis
163
522 Basic Procedure
164
523 Comparison between FMEA and FTA
166
53 Quantitative Fault Tree Analysis
168
533 Application to Systems
173
54 Reliability Graph
179
55 Examples
180
552 Fault Tree Analysis of a Radial Seal Ring
183
56 Exercise Problems to the Fault Tree Analysis
187
Assessment of Lifetime Tests and Failure Statistics
191
61 Planning Lifetime Tests
192
62 Order Statistics and their Distributions
194
63 Graphical Analysis of Failure Times
203
631 Determination of the Weibull Lines two parametric Weibull Distribution
204
632 Consideration of Confidence Intervals
207
633 Consideration of the Failure Free Time t0 three parametric Weibull Distribution
211
64 Assessment of Incomplete Censored Data
215
641 Censoring Type I and Type II
217
642 Multiple Censored Data
219
643 Sudden Death Test
220
65 Confidence Intervals for Low Summations
237
66 Analytical Methods for the Assessment of Reliability Tests
239
661 Method of Moments
240
81 Test Planning Based on the Weibull Distribution
265
82 Test Planning Based on the Binomial Distribution
267
83 Lifetime Ratio
269
84 Generalization for Failures during a Test
273
85 Consideration of Prior Information BayesiansMethod
274
851 Procedure from BeyerLauster
275
852 Procedure from Kleyner et al
277
86 Accelerated Lifetime Tests
281
861 TimeAcceleration Factor
282
862 Step Stress Method
284
863 HALT Highly Accelerated Life Testing
285
864 Degradation Test
286
87 Exercise Problems to Reliability Test Planning
288
Lifetime Calculations for Machine Components
291
91 External Loads Tolerable Loads and Reliability
292
911 Static and Endurance Strength Design
293
912 Fatigue Strength and Operational Fatigue Strength
298
92 Load
302
921 Determination of Operational Load
303
922 Load Spectrums
307
93 Tolerable Load Wöhler Curves SNCurve
320
931 Stress and Strain Controlled Wöhler Curves
321
932 Determination of the Wöhler Curves
322
94 Lifetime Calculations
325
942 Two Parametric Damage Calculations
330
943 Nominal Stress Concept and Local Concept
332
95 Conclusion
334
Maintenance and Reliability
338
1011 Maintenance Methods
339
1012 Maintenance Levels
342
1014 Maintenance Capacities
343
1015 Maintenance Strategies
345
102 Life Cycle Costs
346
103 Reliability Parameters
350
1032 Maintenance Parameters
352
1033 Availability Parameters
356
104 Models for the Calculation of Repairable Systems
359
1041 Periodical Maintenance Model
360
1042 Markov Model
365
1043 BooleMarkov Model
374
1044 Common Renewal Processes
375
1045 Alternating Renewal Processes
380
1046 SemiMarkov Processes SMP
389
1047 System Transport Theory
391
1048 Comparison of the Calculation Models
395
105 Exercise Problems to Repairable Systems
397
1052 Calculation Problems
399
Reliability Assurance Program
403
112 Fundamentals of the Reliability Assurance Program
405
1122 Product Design
407
1123 Production and Operation
411
1124 Further Actions in the Product Design Cycle
412
Solutions
414
Appendix
473
Index
489
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About the author (2008)

Professor Bernd Bertsche earned his degree and doctorate in mechanical engineering at the Universitaet Stuttgart. Afterwards, he worked for Mercedes-Benz AG in the passenger car development unit followed by a position as professor at the University of Applied Sciences in Albstadt-Sigmaringen. Later, he was appointed at the Universitaet Stuttgart. Since 2001 Professor Bertsche is the ordinary and head for the Institute of Machine Components at the Universitaet Stuttgart.

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