Static, dynamic and fatigue analysis of a semi-automaticgun locking block

Ozmen, Dogan; Kurt, Mustafa; Eki̇ci̇, Bülent; Kaynak, Yusuf

doi:10.1016/j.engfailanal.2009.03.014

Cited by 17 publications

(9 citation statements)

References 5 publications

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“…This hence validates the necessity of conducting this finite element simulation analysis [6,7]. The finite element simulation [8][9][10][11] was conducted with fine-sized mesh and rest being default meshing settings in the following steps:…”

Section: Strength Analysismentioning

confidence: 63%

Design and Static Load Analysis Comparing Steel, Grey Cast Iron and Titanium Alloy as Materials for Breech Hinged Lugs in Recoil Weapons

Chaturvedi

Dwivedi

2018

AiMT

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This design innovation work is related to design validation of short recoil weapons mechanism's critical components in context of upper receivers. It explains a new mechanism for locking and unlocking of bolt with the breech and subsequent advantageous design changes in the bolt's construction. This design intends to build a new platform for a short recoil weapon chambered in 5.56×45 NATO ammunition which promises competency with its existing counter parts of the same domain, but exhibiting exceptionally improved reliability due to elimination of interdependence of reciprocating cycles of barrel and bolt assemblies. This work involves the design of the whole functioning system using Solidworks 2015 version and a static structural analysis to compare and choose the most suitable material among commonly used ones: steel AISI 4340, grey cast iron and titanium alloy Ti-6Al-4V, for locking lugs, being critical pair of components, using ANSYS 14.5. Results showed that titanium alloy was the most suitable material for the strength purpose. It is to be noted that this system may not only be utilized for assault rifles, but also for sub-machine guns, machine gun variants and even in handguns.

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Section: Strength Analysismentioning

confidence: 63%

Design and Static Load Analysis Comparing Steel, Grey Cast Iron and Titanium Alloy as Materials for Breech Hinged Lugs in Recoil Weapons

Chaturvedi

Dwivedi

2018

AiMT

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“…For the fatigue analysis, the load condition and boundary condition were the same as those in the previous structural analysis, and the S-N curve information of the fixing bolt (S45C) for fatigue analysis was input in addition to the material properties [19][20]. The cyclic load consisted of a sine-type zero-based load, and Goodman's fatigue equation was applied [21][22][23][24]..…”

Section: Boundary Conditionsmentioning

confidence: 99%

Failure Analysis of fractured Fixing Bolts of a Mobile Elevating Work Platform using Finite Element Methods

Choi¹,

Kim²

2019

Preprint

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Mobile elevating work platforms (MEWPs) consist of a work platform, extending structure, and chassis, and are used to move persons to working positions. MEWPs are useful but are composed of pieces of equipment, and accidents do occur owing to equipment defects. Among these defects, accidents caused by the fracture of bolts fixed to the extension structure and swing system are increasing. This paper presents a failure analysis of the fixing bolts of MEWP. Standard procedure for failure analysis was employed in this investigation. Visual inspection, chemical analysis, tensile strength measurement, and finite element analysis (FEA) were used to analyze the failure of the fixing bolts. Using this failure analysis approach, we found the root cause of failure and proposed a means for solving this type of failure in the future. First, the chemical composition of the fixing bolt is obtained by a spectroscopy chemical analysis method, which determined that the chemical composition matched the required standard. The tensile test showed that the tensile and yield strengths were within the required capacity. The stress analysis was carried out at five different boom angles, and it was determined that the fixing bolt of MEWP can withstand the loads at all the boom angles. The outcomes of the fatigue analysis revealed that the fixing bolt fails before reaching the design requirements. The results of the fatigue analysis showed primarily that the failure of the fixing bolt was due to fatigue. A visual inspection of the fractured section of the fixing bolt also confirmed the fatigue failure. We propose a method to prevent failure of the fixing bolt of the MEWP from four different standpoints: the manufacturer, safety certification authority, safety inspection agency, and owner.

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“…The nonlinear finite element, orthogonal test method, and rigid body dynamics have been used to determine that the clearance between projectile and bore. [1][2][3][4] In the analysis of the dynamic process of firing, it has been determined that the deformation and dynamic response of a guided projectile is affected by the engraving force. 5,6 Procha´zka and Ninh 7 determined that a high temperature in the barrel walls causes more deformation than the mechanical load of the shot.…”

Section: Introductionmentioning

confidence: 99%

Internal ballistics of polygonal and grooved barrels: A comparative study

et al. 2021

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As a parameter important ballistic, the research about polygonal and grooved barrels’ behavior has not been widely carried out. The pressures, velocities, stresses, deformations, and strains generated by the firing of 9 mm × 19 mm ammunition in weapons with polygonal barrels are analyzed numerically and experimentally, compared with those generated in pistols with grooved barrels. The Finite Element Method with equal boundary and loading conditions was used in both types of guns, specifying the actual materials of the projectile and the barrels. Subsequently, experimental tests were carried out on various weapons with 9 mm ammunitions of 115, 122, and 124 gr. The results show that the 9 mm bullet fired in a polygonal barrel undergoes a maximum deformation towards its exterior of 0.178 mm and interior of 0.158 mm, with stress up to 295.85 MPa. Compared with 0.025 mm maximum external deformation and 0.112 mm internal deformation of 9 mm projectiles fired in a grooved barrel, with stress up to 269.79 MPa. The deformation in the polygonal barrel is in a greater area, but the rifling impression left is less deep, making its identification more difficult. Although there are differences in the stresses and strains obtained, similar velocity and pressure parameters are achieved in the two types of barrels. This has application in the development and standardization of new kinds of barrels and weapons.

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Static, dynamic and fatigue analysis of a semi-automaticgun locking block

Cited by 17 publications

References 5 publications

Design and Static Load Analysis Comparing Steel, Grey Cast Iron and Titanium Alloy as Materials for Breech Hinged Lugs in Recoil Weapons

Design and Static Load Analysis Comparing Steel, Grey Cast Iron and Titanium Alloy as Materials for Breech Hinged Lugs in Recoil Weapons

Failure Analysis of fractured Fixing Bolts of a Mobile Elevating Work Platform using Finite Element Methods

Internal ballistics of polygonal and grooved barrels: A comparative study

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