Design and Static Load Analysis Comparing Steel, Grey Cast Iron and Titanium Alloy as Materials for Breech Hinged Lugs in Recoil Weapons
Keywords:short recoil weapons, wedge cam lugs, breech, barrel assembly, cam frame
This design innovation work is related to design validation of a 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 the subsequent advantageous design changes in the bolt’s construction. This design intends to build a new platform for a short recoil weapon chambered in 5.56x45 NATO ammunition which promises competency with its existing counter parts of 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 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, 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 can not only be utilized for assault rifles, but also for sub-machine guns, machine gun variants and even in handguns.
EKSERGIAN R. Theory and Design of Recoil Systems and Gun Carriages. Ordnance Department document No. 2035. Washington, 1921.
JOHNSON, J.R. and MELVIN, M. Firearm [US Patent]. US2094156A, 28. 9. 1937.
BROWNING, J.M. Automatic Firearm [US Patent]. US1618510, 22. 2. 1927.
Fedorov Avtomat [Wikipedia]. [cited 2018-01-10]. Available from: <https://en.wikipedia.org/wiki/Fedorov_Avtomat>.
DOD: MIL-HDBK-5J, Department of Defense Handbook: Metallic Materials and Elements for Aerospace Vehicle Structures. 31. 1. 2003.
PURDY, D.J. Modelling and Simulation of a Weapon Control System for a Main Battle Tank. In Proceedings of the eighth US Army Symposium on Gun Dynamics.Newport, 1996.
NADEEM, A., BROWN, R.D. and HAMEED, A. Finite Element Modelling and Simulation of Gun Dynamics using “ANSYS”. In Proceedings of Tenth International Conference on Computer Modelling and Simulation. Cambridge, IEEE, 2008.
THOMPSON, M.K. and THOMPSON, J.M. Chapter 1 Introduction to ANSYS and Finite Element Modelling. ANSYS Mechanical APDL for Finite Element Analysis. Butterworth-Heinemann, 2017. ISBN 9780128129814.
OZMEN, D., KURT, M., EKICI, B. and KAYNAK, Y. Static, Dynamic and Fatigue Analysis of a Semi-automatic Gun Locking Block. Engineering failure analysis, 2009, vol. 16, no. 7. p. 2235-2244. ISSN 1350-6307. https://doi.org/10.1016/j.engfailanal.2009.03.014.
SINGH, O. and SHARMA, S. Analysis and Comparison of Total Deformation of Welded Plates in Tensile and Fatigue Tests using ANSYS. Materials Today: Proceedings, 2017, vol. 4, no. 8, p. 8409-8417. https://doi.org/10.1016/j.matpr.2017.07.185.
ANSYS Workbench Strain Life Approach Lectures. [on line]. [cited 2018-01-09].
AZO Materials [on line]. [cited 2018-01-10]. Available from: <https://www.azom.com>.
5.56×45 mm NATO. [Wikipedia]. [cited 2018-01-10]. Available from: .
DATER, P.H. and WONG, J.M. Effects of Barrel Length on Bore Pressure, Projectile Velocity and Sound Measurement. Seattle: Defense Technical Information Center, 2010.
PUCHI–CABRERA, E.S. et al. Fatigue Properties of a SAE 4340 Steel Coated with TiCN by PAPVD. International Journal of Fatigue, 2007; vol. 29, no. 3, p. 471-480. https://doi.org/10.1016/j.ijfatigue.2006.05.003.
TORRES, M.A.S. and VOORWALD, H.J.C. An Evaluation of Shot Peening, Residual Stress and Stress Relaxation on the Fatigue Life of AISI 4340 Steel. International Journal of Fatigue, 2002 vol. 24, no. 8, p. 877-886. https://doi.org/10.1016/S0142-1123(01)00205-5.
PENG, X.M. et. al. Ablation Behavior of NiCrAlY Coating on Titanium Alloy Muzzle Brake. Surface and Coatings Technology, 2013, vol. 232, p. 690-694. https://doi.org/10.1016/j.surfcoat.2013.06.078.
HERTL, C., et al. Structural Characterisation of Oxygen Diffusion Hardened Alpha-tantalum PVD-coatings on Titanium. Materials Science and Engineering C, 2014, vol. 41, p. 28-35. https://doi.org/10.1016/j.msec.2014.03.018.
How to Cite
Copyright (c) 2018 Advances in Military Technology
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Authors who publish with this journal agree to the following terms:
1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
Users can use, reuse and build upon the material published in the journal for any purpose, even commercially.