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concurrent engineering

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089646
EISBN: 978-1-62708-235-8
... Abstract Nodular cast iron crankshafts and their main-bearing inserts were causing premature failures in engines within the first 1600 km (1000 mi) of operation. The failures were indicated by internal noise, operation at low pressure, and total seizing. Concurrent with the incidence of engine...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001522
EISBN: 978-1-62708-235-8
... to eliminate the turbulent flow problem during the permanent mold casting process. These failure analysis studies show that porosity resulting from turbulent flow in the design mold can be corrected by redesigning the gating system. They also demonstrate that a more effective concurrent design engineering...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001906
EISBN: 978-1-62708-217-4
... is a blacklight photomacrograph showing an example of a forging lap contained within the bail of a lug subjected to this screening. Many lugs also contained seams, as revealed through MPI. Concurrently, ARL and NAWCWD representatives visited the manufacturing facility to determine how the defective parts had been...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... retention, and concurrent welding of both flanges of the beam. Each of the recommendations noted in the last item of the preceding list was immediately implemented for subsequent structural welds as well as for the rework of the failed weld. As would be expected in a construction environment, several...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003503
EISBN: 978-1-62708-180-1
... and effects analysis fault analysis fault equivalence probability of failure product development cycle FAILURE MODES AND EFFECTS ANALYSIS (FMEA) has evolved into a powerful tool that can be used by design engineers during all phases of product development to enhance product safety and reliability...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001570
EISBN: 978-1-62708-220-4
... Thermal fatigue fracture Crevice corrosion In recent years, there has been a growing application of reactive metals in the processing equipment in chemical, petroleum, and power industries. Commercially pure titanium with desirable engineering properties as well as excellent corrosion resistance...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006849
EISBN: 978-1-62708-395-9
... and engineering thermoplastics. All test specimens are prepared by one source. This prevents any variations in mold design and/or molding conditions that would result from each participant molding individualized specimens. An alternative, small-scale repeatability study compares test data generated by two...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006801
EISBN: 978-1-62708-329-4
... to their characteristic shape. On the engineering stress-strain curve, initiation of necking occurs after uniform elongation, which is the engineering strain associated with the ultimate tensile strength. Engineering stress is defined as the load divided by the initial cross-sectional area of the dog bone, while true...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006922
EISBN: 978-1-62708-395-9
... Abstract There are many reasons why plastic materials should not be considered for an application. It is the responsibility of the design/materials engineer to recognize when the expected demands are outside of what the plastic can provide during the expected life-time of the product...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006762
EISBN: 978-1-62708-295-2
... progresses, particularly when testing is inconclusive, contradictory, or cannot be performed. Failure analysts can and should change their theory of failure as the investigation progresses if the data warrant another investigative path. Frequently, customers without a background in materials, engineering...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006914
EISBN: 978-1-62708-395-9
... ). Fire-resistant engineering plastics and elastomers are commonly used in home furnishings, as well as in the building, transportation, appliance, and electronic industries. For any given application, three types of fire safety requirements must generally be met: customer, government, and insurance...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
... concept of design is discussed. The article also describes the role of the materials engineer in the design and materials selection process. It provides information on the significance of materials selection in both the prevention and analysis of failures. failure analysis failure prevention...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... Abstract Materials selection is an important engineering function in both the design and failure analysis of components. This article briefly reviews the general aspects of materials selection as a concern in proactive failure prevention during design and as a possible root cause of failed...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
... of corrosion products, the geometry of fracture surfaces, or inaccessibility of the component making chemical analysis a challenge. The investigator must take every precaution to avoid delivering misleading compositional information, and engineering/scientific judgement is key in providing the best possible...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006926
EISBN: 978-1-62708-395-9
... applications. Organic liquids such as cleaning fluids, detergents, gasoline, lubricants, and sealants may seriously reduce the mechanical properties of plastics. It is therefore important for engineers performing failure analyses on products made from polymeric materials to consider the effects of exposure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
... used as engineering materials is that they have high strength but also generally have the capability to respond to load (stress) by deforming. In fact, much of metallurgical engineering is concerned with balancing strength and ductility. Thus, distortion often is observed in analysis of other types...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... THIS VOLUME is organized according to four general categories of failure: fracture, corrosion, wear, and the subject of this article, distortion. One reason metals are so widely used as engineering materials is that they have high strength but also generally have the capability to respond to load (stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001821
EISBN: 978-1-62708-180-1
... for the westbound lanes. The truck distribution and its position in the lanes were also concurrently recorded, and their weights were sampled. Some additional measurements were made in 1976 ( Ref 7 ). The composition of the average daily truck traffic (ADTT) at the Yellow Mill Pond Bridge was about the same...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006932
EISBN: 978-1-62708-395-9
... Abstract Engineering plastics, as a general class of materials, are prone to the development of internal stresses which arise during processing or during servicing when parts are exposed to environments that impose deformation and/or temperature extremes. Thermal stresses are largely...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... concurrently bridging damage mechanisms occurring in high-temperature isothermal tests and traditional TMF tests. A representative OP-BiF waveform is shown in Fig. 8(a) . Yet another waveform used in laboratory testing to represent realistic thermomechanical loading may be characterized as high-cycle fatigue...