Composite Weapon Barrel Structure for Thermal Creep Resistance
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Solution Overview
Problem
Conventional weapon barrels experience deformation due to heating, leading to reduced accuracy and mechanical integrity, especially during extended high-frequency firing.
Innovation Solution
The development of enhanced weapon barrels featuring a composite design with an inner core and an outer sleeve, where the sleeve is made from a metal-matrix composite or beryllium alloy, providing improved thermal conductivity and stiffness without significant weight increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional weapon barrels are used, then the structure is simple and manufacturing is easy, but the barrel deforms due to heating during extended high-frequency firing, reducing accuracy
Solution Approach 1:
The patent applies composite materials by combining a metal core with a metal-matrix composite sleeve. The core provides structural strength while the sleeve with superior thermal conductivity dissipates heat, preventing thermal deformation and maintaining accuracy during extended firing. This composite structure resolves the contradiction by improving thermal management without sacrificing structural integrity.
Solution Approach 2:
The barrel is segmented into two distinct functional components: an inner metal core and an outer metal-matrix composite sleeve. Each segment performs a specific function - the core provides mechanical strength and the sleeve provides thermal management. This segmentation allows optimization of each component for its specific purpose, resolving the contradiction between structural requirements and thermal management.
2Strength
If the barrel thickness is increased to maintain shape and rigidity, then the mechanical integrity improves, but the weight increases significantly
Solution Approach 1:
The metal-matrix composite sleeve provides high rigidity and strength-to-weight ratio, allowing the barrel to maintain shape and rigidity without increasing wall thickness. The composite material's superior mechanical properties enable thinner walls while maintaining structural integrity, thus improving rigidity without significant weight increase.
Solution Approach 2:
The sleeve is applied locally around the core where thermal and mechanical stresses are highest. This localized reinforcement provides the necessary rigidity and thermal management where needed, rather than uniformly thickening the entire barrel, thus improving strength without proportional weight increase.
3Temperature
If conventional materials are used, then the manufacturing process is simple, but the heat dissipation capability is insufficient, leading to thermal creep
Solution Approach 1:
The metal-matrix composite sleeve incorporates high thermal conductivity materials that significantly enhance heat dissipation capability compared to conventional metals. This composite structure resolves the thermal management issue by providing superior heat transfer properties, preventing thermal creep during extended firing.
Solution Approach 2:
The metal-matrix composite sleeve acts as an intermediary thermal management layer between the hot core and the external environment. It facilitates heat transfer from the core to the surroundings, improving overall heat dissipation capability while protecting the core from thermal damage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This composite barrel design effectively dissipates heat, reduces thermal creep, and maintains mechanical integrity, thereby enhancing the accuracy and durability of the weapon during prolonged firing.
Implementation Method 1
the sleeve is made from a metal-matrix composite or beryllium alloy, providing improved thermal conductivity
Implementation Method 2
reduces thermal creep, and maintains mechanical integrity
Data Source
AI summary
A weapon barrel includes an inner core and an outer sleeve. The inner core has a first end, a second end, a bore extending from the first end to the second end, and an external surface extending from the first end to the second end. The inner core includes a material selected from the group consisting of a ferrous alloy, a non-ferrous alloy, a ceramic, a bonded ceramic, and a cemented carbide. The outer sleeve has a first end, a second end, an internal surface extending from the first end to the second end, and an external surface extending from the first end to the second end. The outer sleeve is disposed around and permanently joined to the inner core. The outer sleeve includes a material selected from the group consisting of a metal-matrix composite and a beryllium alloy, the outer sleeve material being located at and between the internal surface and the external surface of the outer sleeve.