Subjects -> ESTATE, HOUSING AND URBAN PLANNING (Total: 304 journals)
    - CLEANING AND DYEING (1 journals)
    - ESTATE, HOUSING AND URBAN PLANNING (237 journals)
    - FIRE PREVENTION (13 journals)
    - HEATING, PLUMBING AND REFRIGERATION (6 journals)
    - HOME ECONOMICS (9 journals)
    - INTERIOR DESIGN AND DECORATION (21 journals)
    - REAL ESTATE (17 journals)

FIRE PREVENTION (13 journals)

Showing 1 - 16 of 16 Journals sorted alphabetically
Combustion and Flame     Hybrid Journal   (Followers: 93)
Disaster Recovery Journal     Full-text available via subscription   (Followers: 4)
Eating Disorders: The Journal of Treatment & Prevention     Hybrid Journal   (Followers: 18)
Fire and Materials     Hybrid Journal   (Followers: 5)
Fire Safety Journal     Hybrid Journal   (Followers: 15)
Fire Science Reviews     Open Access   (Followers: 11)
Fire Technology     Hybrid Journal   (Followers: 8)
FirePhysChem     Open Access  
International Journal of Critical Infrastructure Protection     Hybrid Journal   (Followers: 4)
International Journal of Emergency Services     Hybrid Journal   (Followers: 22)
International Journal of Forensic Engineering     Hybrid Journal   (Followers: 2)
International Journal of Wildland Fire     Hybrid Journal   (Followers: 9)
Journal of Failure Analysis and Prevention     Hybrid Journal   (Followers: 4)
Journal of Structural Fire Engineering     Full-text available via subscription   (Followers: 4)
Sexual Addiction & Compulsivity: The Journal of Treatment & Prevention     Hybrid Journal   (Followers: 4)
Substance Abuse Treatment, Prevention and Policy     Open Access   (Followers: 9)
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Journal of Failure Analysis and Prevention
Journal Prestige (SJR): 0.315
Citation Impact (citeScore): 1
Number of Followers: 4  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1864-1245 - ISSN (Online) 1547-7029
Published by Springer-Verlag Homepage  [2467 journals]
  • Correction: Studies on Fretting Wear Damage Assessment of Piecewise Linear
           Systems Having Predefined Gap

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      PubDate: 2023-02-01
       
  • Events

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      PubDate: 2023-02-01
       
  • Structural Analysis of a Worm Gearbox System Subjected to Dynamic External
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      Abstract: Abstract Despite its size, worm gears can provide a significant speed reduction and altering rotational motion by 90 degrees. The stiffness of worm gear drives, as well as the corresponding worm shaft deflection, is known to have an impact on wear, noise, and vibration behavior. A product's durability and ability to function as intended are determined by finite element analysis. The primary goal of this study is to analyze a worm gearbox system that is subjected to dynamic external loading and determine how the system is affected by stresses and deformations as the external load is increased. The worm gear box system is modelled and assembled using the PTC Creo 9.0 software package. The selected worm gear box assembly is structurally and modally analyzed using finite element software PTC Creo Simulation LIVE 9.0. With the help of this study, the system's highest stress concentration point was found to be at the output shaft location immediately outside the gearbox output shaft opening, and this point stays constant under all scenarios of increasing dynamic loading. Additionally, it has been discovered that as load increases, the displacement at the output shaft's location increases faster than that at the input shaft's location. The results of the study will be helpful in designing the output shaft of the worm gearbox while accounting for external loads acting on the output shaft.
      PubDate: 2023-02-01
       
  • Metallurgical Analysis of Failed M250 Maraging Steel Piston Rod of Tension
           Reduction Device Used in Aerospace System

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      Abstract: Abstract M250 Maraging steel is widely used in satellite launch vehicle-related systems due to its excellent combination of strength and toughness. Tension reduction device (TRD) is used in horizontal separation system to reduce the band tension gradually from 100+5 to 20+5kN just before separation. During the disassembly of TRD after structural qualification test, one maraging steel piston rod was found broken. Detailed metallurgical analysis was carried out on the failed piston rod to understand the cause of failure. Fractographic observations on the piston rod revealed intergranular and cleavage features indicative of brittle mode of failure. Corrosion pits and cracks were observed on the outer surface near the fracture edge. The chemical composition analysis by energy-dispersive spectroscope (EDS) at the edges of the fracture surface revealed corrosion products. Presence of chlorine in the corrosion products was also noticed. Based on the detailed metallurgical analysis, the failure of the piston rod was attributed to stress corrosion cracking.
      PubDate: 2023-02-01
       
  • Product News

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      PubDate: 2023-02-01
       
  • Industry Updates

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      PubDate: 2023-02-01
       
  • Training

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      PubDate: 2023-02-01
       
  • Professional Resources

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      PubDate: 2023-02-01
       
  • Metallurgical Analysis of Crack in AISI 446 Steel Solenoid Bobbin of
           Latchable Series Redundant Valve (LSRV)

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      Abstract: Abstract The propellant flow control valves, also referred to as latchable series redundant valves (LSRV’s) are essentially used in satellite control systems. Main component of these valves are solenoid bobbins, which composed of four parts, three of which are made of AISI 446 ferritic stainless steel and one part is made of AISI 304L austenitic stainless steel. These parts are joined by electron beam (EB) welding after shrink fitting to form an important component for propellant flow control systems. During dye penetrant (DP) testing of these components after annealing heat treatment, discontinuous cracks were noticed in AISI 446 steel at the inner side of the bobbin. Detailed metallographic and fractographic analysis on the failed component showed a discontinuous crack path circumferentially near the HAZ region of AISI 446 steel. The fracture morphology revealed a complete transgranular cleavage fracture which indicated a brittle mode of failure. Further, AISI 446 raw material was also analyzed along with heat treatment cycle followed in the valve component.
      PubDate: 2023-02-01
       
  • Qualification Approach for High-Pressure Spool Shaft of a Low-Bypass
           Turbofan Engine for Structural Integrity and Life

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      Abstract: Abstract A shaft has been designed for the high-pressure rotor of a low-bypass military turbofan engine. The complex mission profile of the engine with high throttle excursion demands reliable operation of the shaft throughout the flight envelope maintaining structural integrity and life. Therefore, qualification of the shaft for a fighter class engine is a challenge from airworthiness point of view. This paper presents the methodology adopted and various stages of qualification and standards followed to demonstrate structural integrity and life of the shaft for fitment in engine and engine on aircraft. The shaft successfully completed the qualification procedure and thus ensured the airworthiness for aero engine fitment.
      PubDate: 2023-02-01
       
  • A Novel Approach to Investigate Transient Stress Distribution Caused by
           Fiber Breakage in Simple and Hybrid Composite Materials

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      Abstract: Abstract The present research work concerned with the transient stress distribution created in the composite material due to fiber breakage. Transient stress is the dynamic response of the system due to discontinuity in the fibers, from the moment of discontinuity to the moment of reaching the steady state. For this purpose, the dynamic equilibrium equations governing the composite lamina with finite dimensions and in the presence of discontinuity have been extracted and the effect of moving the location of the fiber discontinuity, changing the type of fibers and matrix, changing the width of the matrix, and finally the effect of the hybridization of the composite material on the stress concentration coefficient and shear stress created in it have been investigated. Shear-lag’s theory was used to derive the governing dynamic equilibrium equations, and the explicit finite difference method was applied to solve the differential equation of fiber displacement. The results of current study showed that the maximum stress concentration is created at the tip of the crack (place of fiber breakage) and with the increase in the number of broken fibers and the displacement of the fracture location toward the edges, the stress concentration coefficient and the amount of shear stress created also increase.
      PubDate: 2023-02-01
       
  • Role of Surface Modification Techniques to Prevent Failure of Components
           Subjected to the Fireside of Boilers

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      Abstract: Abstract There are distinct types of boilers, such as fire tube boilers, water tube boilers, pulverized fuel boilers, grate furnace boiler, oil and gas-fired boilers, fluidized bed combustion boilers, and waste heat boilers. These boilers are employed in distinct industries such as chemical, fertilizer, refinery, cement, textile, pharmaceutical, steel, sugar, pulp and paper, food, and thermal power plants. But these boilers are subjected to various types of failures and pose a severe threat to the efficiency of the plant/industries. Hence, this manuscript aims to provide an overview of various causes of boiler failures, including caustic embrittlement, oxygen pitting, fouling, agglomeration, hydrogen damage, stress corrosion cracking, slagging, fatigue failure, hot corrosion, oxidation, erosion, etc. Finally, various preventive measures, including surface modification techniques, are discussed. So, by developing more advanced coating material combinations and methods/preventive measure, it is possible to improve the qualities of protection for futuristic applications.
      PubDate: 2023-02-01
       
  • A Review of the Rolling Contact Fatigue of Rail Wheels Under Various
           Stresses

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      Abstract: Abstract This research paper reviews the recent works on the rolling contact fatigue of rail wheels. The topic covered includes the mathematics equations of rail-wheel contact stress and fatigue, RCF defects in the rail, the development of cracks, and the strategies used to reduce the rate of RCF defects. Therefore, the main understandings of RCF as they currently stand are crucial for the improvement and mitigation on rail fatigue failures in the future. This research paper has not been published yet and has not been discussed yet by the Malaysia Railway Network.
      PubDate: 2023-02-01
       
  • Failure Analysis of Large Stroke Welded Disk Bellows in Storage

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      Abstract: Abstract Five out of ten welded disk bellows manufactured of AM350 stainless steel for the control rod drive mechanism of the fast breeder test reactor showed an increase in leak rate using helium leak testing from 10−9 to 10−4 Pa-m3/s during storage. Though the leak rate is so small that no leak can be detected by soap bubble test, it is more than the acceptable value for deploying in reactor (10−8 Pa-m3/s). This paper presents the results of a systematic failure analysis carried out and recommendations to prevent similar failures in the future. In service, the bellows are deployed in subcooled and tempered (SCT) condition conforming to SCT1000 condition in ASTM A693. The effectiveness of the heat treatment was verified by mechanical properties and x-ray diffraction investigations and compared with the values reported in the standard. Confocal and scanning electron microscopy of the failed bellows at the location of the failure was carried out and few pits were observed on the failed bellows both on the base metal and the weld. Confocal microscopy of the bellows from the other lot did not show significant pits. The potentiodynamic anodic polarization studies of AM350 indicate that AM350 in the solution annealed condition possesses less pitting resistance compared to that in the SCT1000 condition. This also explains the reason for the failure of bellows manufactured in a specific lot with a significant delay between the manufacturing to the heat treatment. This paper also presents recommendations to prevent similar failures in the future.
      PubDate: 2023-02-01
       
  • Airworthiness Qualification of a High-Pressure Turbine Disk for a Low
           Bypass Turbofan Engine

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      Abstract: Abstract A single stage high-pressure turbine disk has been designed for a low bypass turbofan engine. The turbine disk operates at extreme operating conditions of temperature and rotational speed with cyclic load due to high throttle excursion. The complex mission profile of these engines demands reliable operation of the turbine throughout the flight envelope maintaining structural integrity. Therefore, qualification of the HP turbine disk is a challenging task. This paper presents the analyses and qualification tests carried out on HP turbine disk to examine the structural integrity as well as the life of the turbine disk. Successful completion of the qualification tests assure the airworthiness of the turbine disk for the aero engine for safe and reliable operation within the flight envelope.
      PubDate: 2023-02-01
       
  • Experimental and Numerical Study of HSLA Steel Fatigue and Pitting
           Corrosion Behavior

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      Abstract: Abstract This paper presents an experimental and numerical study of the fatigue-corrosion behavior of the high strength low alloy steel known as HSLA steel in marine environment. Based on a case study of steel removed from of hull ship after about 1300 h of service in seawater, microstructural fatigue-corrosion indicators are detected such as micro-cracks, micro-pits, and beach marks. In addition, the mechanical properties decreased dramatically. Pitting corrosion acts as the main phenomena leading to the metal deterioration. This is confirmed through electromechanical calculation and potentiodynamic curves. Since, the environment is harsh and out of our control, a numerical study of the effect of pitting and the coupling between fatigue and pitting corrosion is held. The results show that the geometry of corrosion defect is responsible for the propagation of the pit and can lead to the crack formation. von Mises stress propagation is controlled too by the corrosion potential distribution.
      PubDate: 2023-02-01
       
  • Analysis of Contact Stress and Fatigue Crack Growth of Transmission Shaft

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      Abstract: Abstract The finite element model and fracture mechanic theory are applied to analyze the contact stress and fatigue crack growth (FCG) path in three dimensions for a transmission shaft, which owns the initial crack and runs with the periodic load. The study found that the periodic load generates a non-proportional stress intensity factor history (SIF) output in the root of the splines. A modified method based on Hertz theory and AGMA (American Gear Manufacture Association) standard is utilized to analyze contact stress with considering the crack growth. From this, it is feasible to predict FCG path in three dimensions for a cracked component. The comparison between the simulation and experiment illustrates that the crack growth path is sensitive to the location and magnitude of loads. Contact regions of stress and fracture mechanic parameters should be deeply analyzed and known before predicting FCG path in three dimensions.
      PubDate: 2023-01-20
       
  • An Empirical Comparison of Oxidation and Combustion Phenomena in
           Ti–6Al–4V Exposed to Earth Re-Entry and Arc-Jet Test Environments
           Using Hierarchical Methods of Inquiry

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      Abstract: Abstract The Ti–6Al–4V alloy is widely used in aerospace applications for its beneficial combination of properties. However, this alloy has high solubility for oxygen and thus a high reactivity. An evaluation of the structure and mechanical properties is represented for characterization of the Ti–6Al–4V alloy after being subjected to the oxygen-rich atmospheric entry environment. Recovered Ti–6Al–4V artifacts from the Columbia shuttle disaster suggest that this alloy underwent an accelerated degradation and combustion reaction when exposed to the high enthalpy, low-pressure surroundings experienced during re-entry into earth’s atmosphere after the shuttle broke up. Arc-jet testing has provided a simulated aerothermodynamic heating environment to mimic what the spacecraft endured. Thermal alteration effects on this alpha–beta phase alloy were investigated using a hierarchical evaluation framework. Macroscopic, meso-scale, and micro-scale inspections are described. Qualitative inferences between the ground-based model and Columbia shuttle were made. Microscopic evaluation shows a disruption of crystalline order contrasting the unaffected state. Further characterizations were made to investigate the mechanical behavior correlations by means of microhardness techniques to describe the structural hardness variations. This article provides an opportunity to review the progression of structural development along various dimensional scales using hierarchical resolutions.
      PubDate: 2023-01-20
       
  • Effect of Temperature on the Energy Release Rate Variation in Repaired
           Laminate Composites

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      Abstract: Abstract This work initially aims to study the influence of temperature on the mechanical properties of composite materials and adhesive. With this purpose, the mechanical properties of the adhesive and composite were measured experimentally under different temperature to provide the requested information for finite element modeling, and then inserted in a numerical model of bonded composite patch on cracked laminate composite plate to evaluate the fracture energy variations at repaired crack tip for different temperatures. The main results obtained confirm the beneficial effects of the composite patch on the mechanical behavior of a cracked composite. Moreover, the reduction in the mechanical properties induced by temperature negatively affects the repair strength. On the other hand, the fracture energy is strongly related to crack length and temperature.
      PubDate: 2023-01-19
       
  • Study on the Influence of Heat on Deformation and Stress of Planetary Gear
           Transmission

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      Abstract: Abstract Due to the friction heat flow of gear during operation is easy to cause the scuffing failure of tooth surface, the heat transfer mechanism of planetary gear is researched in this paper, the thermal analysis model considering the internal and external meshing of gears is established, and the thermal characteristics is analyzed. The three-dimensional distribution of temperature field of sun gear, planet gear and ring gear is investigated, respectively, and the weak location of anti-scuffing of gears was revealed. Based on the 3D temperature field, the thermal deformation of planetary gear is studied and the stress distributions with or without temperature are conducted, and it provides a theoretical support for the thermal modification design and prevents scuffing failure of planetary gear transmission.
      PubDate: 2023-01-12
       
 
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