Introduction to Product Integrity and Reliability Assessment

Evans, John W.; Evans, Jillian Y.; Ryu, Dongsu

doi:10.1007/978-1-4471-0253-3_1

Cited by 11 publications

(14 citation statements)

References 3 publications

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“…For this case study, the normal test time (see Eq. (1)) for t n based on B 10 life warranty for each part, 90% confidence level (CL=0.90, p=0.10), β parameter (determined by Minitab analysis) is summarized in Table 1. Normal test time calculation, t n is shown Eq.…”

Section: Normal Test Timementioning

confidence: 99%

“…In this environment, there were two AFs used; inverse power law and Arrhenius relationship. Many failures mechanisms exhibited time to failure models, which fitted the inverse power law, Arrhenius or a combined inverse power law-Arrhenius model [10]. The inverse power relationship is widely used to model life as a function of pressure-like accelerating variables (e.g., stress, pressure, voltage stress).…”

Section: Af and Accelerated Test Timementioning

confidence: 99%

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Accelerated Life Test Design for Tractor Powertrain Front Axle

2016

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Abstract. Accelerated Life Test (ALT) has been applied in the manufacturing for many years due to rapid changing technologies, more complex products, speedier product development, and more demanding customer requirements. These reasons have pushed the manufacturers to acquire reliability information faster. ALT allows reducing the time needed to show the reliability of the product. The purpose of this study is to design accelerated life testing which involved determination of normal test time, acceleration factor, acceleration test time, and finally experimental setup. This case study provides the basis for ALT designs for the tractor front axle based on customer usage and field failure analysis, which were conducted to estimate the current reliability, especially on the B10 life during the operational stage of the product. The accelerated life test conducted has guaranteed the B10 life of 4,000 hours with 90% confidence level for lesser time needed for testing to show the reliability of the front axle assembly.

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Section: Normal Test Timementioning

confidence: 99%

Section: Af and Accelerated Test Timementioning

confidence: 99%

Accelerated Life Test Design for Tractor Powertrain Front Axle

2016

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“…Fig. 6 illustrates the process that was used to perform the Monte Carlo simulation using using Crystal Ball software and StarOffice suite [3]. Ten input parameters are considered in the analysis, shown at the top of the figure.…”

Section: Input Parameters and Distributionsmentioning

confidence: 99%

Preparation of Loading Information for Reliability Simulation

Lopez

Nathan

Santos

2004

IEEE Trans. Comp. Packag. Technol.

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“…The introduction of reliability in the design process is described in literature as well [24] and introduced in several industrial areas.…”

Section: Introductionmentioning

confidence: 99%

Optimization of mechanical structures under special consideration of materials

Vietor

Akker

2007

GAMM-Mitteilungen

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Structural and Mechanical Optimization Problems are well distributed and described in literature. A high number of applications from different industry fields are publicated. Due to increasing demands for performance improvement together with reduced weight and costs the specific consideration of material laws and uncertainties into optimization problems in mechanical engineering is required. This paper presents an overview about Stochastic Structural Optimization as far as required to consider specific material laws. The application of structural stochastic optimization with specific material laws is illustrated at different test and industrial examples:• Ten-Bar System as standard test application with elastic material law and scattering material parameters • Ceramic Mirror with brittle ceramic materials• Powertrain Mounting System with nonlinear rubber material• Large scale Vehicle Body Structure with plastic material. Here the application will be presented and one of the commercial software systems. The details of this example will be publicated in the future. The numerical evaluation of this example is very expensive and time consuming. This is the one reason why stochastic optimization is not well distributed already.The presented examples are results of different projects the authors has worked at in the last 12 years at university and industry. About a decade ago stochastic optimization routines were still programmed in small working groups at universities. To increase the application to different industry branches, commercial software has to be used. There are a number of software packages on the market claiming the capability of stochastic optimization as well. In the next time these packages will be tested at different applications. This will be part of the planned publication in the future. The Vehicle Body Structure example in this paper will outline the task without going into the details.

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Introduction to Product Integrity and Reliability Assessment

Cited by 11 publications

References 3 publications

Accelerated Life Test Design for Tractor Powertrain Front Axle

Accelerated Life Test Design for Tractor Powertrain Front Axle

Preparation of Loading Information for Reliability Simulation

Optimization of mechanical structures under special consideration of materials

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