Additive Manufactured Subsea Buoyancy Material with Precise Void Packing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current subsea buoyancy and insulation materials, such as epoxy and glass microsphere-based syntactic foam, suffer from suboptimal void packing, leading to inefficient use of materials, weak sections, and inconsistent performance due to random arrangement and size distribution of microspheres, resulting in unachieved maximum void density and composite strength.
Innovation Solution
The use of additive manufacturing (3D printing) to precisely arrange voids and control material thicknesses around and between voids, optimizing void space for maximum strength and insulative value while minimizing density, allowing for customized geometric, pressure, and insulative constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If random packing of microspheres and macrospheres is used in syntactic foam, then buoyancy and insulative value are provided, but maximum void density of 74% is never achieved (only 64% with microspheres, slightly higher with macrospheres)
Solution Approach 1:
The invention segments the void space into regularly-sized spherical cavities with uniform distribution, replacing the random packing approach. This segmentation allows each void to be precisely positioned and sized, achieving the theoretical maximum void density of 74% while maintaining manufacturability through systematic arrangement rather than random placement.
Solution Approach 2:
The invention applies local quality by ensuring uniform epoxy thickness around each spherical void, creating consistent local environments that optimize both strength and insulative properties. Each region around a void is carefully controlled to have precise epoxy layer thickness, unlike the variable thickness in random packing approaches.
2Strength
If spheres are permitted to touch or have minimum epoxy thickness between them, then manufacturing is simplified, but composite strength and insulative value are not maximized
Solution Approach 1:
The invention performs preliminary action by pre-calculating and pre-setting the optimal epoxy thickness between spheres before manufacturing. The spherical voids are positioned and sized in advance with precise spacing that ensures the calculated optimal epoxy layer thickness is achieved, eliminating the need for post-manufacturing adjustments or complex real-time control during curing.
Solution Approach 2:
The invention applies parameter changes by precisely controlling the epoxy thickness parameter to an optimal value that maximizes composite strength and insulative properties. This involves changing from a minimum thickness constraint to a precisely calculated optimal thickness, achieved through controlled void positioning and sizing in the additive manufacturing process.
3Reliability
If random packing methodology is used, then manufacturing process is simpler, but areas void of epoxy occur resulting in weak sections
Solution Approach 1:
The invention segments the material into regularly spaced spherical voids within a continuous epoxy matrix, ensuring complete epoxy encapsulation of each void. This segmentation approach prevents the formation of epoxy-free zones by maintaining systematic spacing and connectivity between all void elements, guaranteeing reliable epoxy distribution throughout the composite.
Solution Approach 2:
The invention implements feedback through finite element analysis (FEA) to verify and optimize the void arrangement before manufacturing. The FEA model provides feedback on the structural integrity and epoxy distribution, allowing adjustment of void positioning and spacing to ensure complete encapsulation and eliminate weak sections before the actual manufacturing process.
4Adaptability or versatility
If custom tooling is produced for each application, then specific geometric and performance requirements are met, but expense and project time increase
Solution Approach 1:
The invention applies universality by using additive manufacturing to create a single flexible process that can produce various syntactic foam configurations without requiring custom tooling for each application. The same 3D printing system can manufacture different void arrangements, sizes, and distributions by simply changing the digital model, making the manufacturing process universal across multiple applications and eliminating the need for application-specific molds.
Solution Approach 2:
The invention uses parameter changes in the digital design phase to adapt to different application requirements. By modifying parameters such as void size, void distribution, spherical cavity dimensions, and epoxy layer thickness in the 3D model, the same manufacturing process can be optimized for different geometric and performance constraints without physical tooling changes.
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 approach results in low-density materials with enhanced strength and insulative properties, suitable for high-pressure applications, by achieving optimized void packing and material distribution, reducing material usage and density while maximizing performance.
Implementation Method 1
The present invention provides material with optimized void spaces created by additive manufacturing, also known as 3D printing.
Data Source
AI summary
The present invention relates to both a material construction and manufacturing method resulting in low density materials, especially for use as subsea buoyancy and insulation. The products are made by an additive manufacturing process, printing thin layers of a polymer material while leaving voids of precisely predetermined shapes, sizes and distribution, with precisely predetermined thicknesses between the voids. The resulting products provide optimized strength, buoyancy and insulative value with minimal material usage and density.