Reducing composite ship environmental impact by 26% through optimized resin content

Why It Matters

Designers and engineers can leverage this insight to make informed material choices and structural optimizations that lead to more sustainable products. By understanding the differential environmental impact of composite components, design decisions can be strategically made to minimize a product's overall ecological footprint throughout its lifecycle.

Key Finding

By reducing the weight of a composite ship through optimized design, environmental impacts like global warming and ozone depletion were significantly lowered, especially during manufacturing. This was largely due to a lower proportion of resin, which has a greater environmental toll than glass fiber.

Key Findings

• Weight reduction of 10.47% was achieved in the lightweight composite ship design.
• Global warming and ozone layer depletion indicators decreased by 26.3% and 42.9% respectively during the 'In Production' phase.
• Resin contributes significantly more to global warming and ozone depletion impacts than glass fiber.
• Prioritizing resin reduction in material design improves the eco-friendly performance of composite ships.

Research Evidence

Aim: How can the resin content in composite ship structures be optimized to minimize environmental impact, specifically global warming and ozone depletion potentials, during the production and use phases?

Method: Comparative Life Cycle Assessment (LCA)

Procedure: A 52-ft. yacht's composite structure was redesigned for reduced weight. Life Cycle Assessments were conducted on both the original and lightweight designs using SimaPro 8, analyzing impacts during production and a 20-year use phase. The environmental impact of glass fiber and resin components were individually assessed.

Context: Marine vessel design, composite materials

Design Principle

Minimize the use of high-impact constituents within composite materials to reduce overall lifecycle environmental burden.

How to Apply

When designing composite products, conduct an LCA to identify the components with the highest environmental impact and explore design modifications to reduce their proportion or substitute them with lower-impact alternatives.

Limitations

The study focused on a specific ship size and type; results may vary for different vessels. The LCA was based on specific software and databases, which can influence outcomes.

Student Guide (IB Design Technology)

Simple Explanation: Making composite parts lighter by using less resin can make them much better for the environment, especially when they are being made.

Why This Matters: This research shows that small changes in material composition, like reducing resin in composites, can lead to significant environmental benefits, which is important for creating responsible designs.

Critical Thinking: To what extent can the findings regarding resin impact be generalized to other composite materials and applications beyond marine vessels?

IA-Ready Paragraph: This research highlights the significant environmental benefits of optimizing material composition in composite structures. By reducing the proportion of resin, a key contributor to global warming and ozone depletion potentials, the overall environmental footprint of composite products can be substantially decreased, particularly during the manufacturing phase. This principle is directly applicable to design projects aiming for enhanced sustainability.

Project Tips

• When choosing materials for your design, consider their environmental impact beyond just performance and cost.
• Think about the entire lifecycle of your product, from raw material extraction to disposal.

How to Use in IA

• Use this study to justify material choices that aim to reduce environmental impact, especially if your design involves composites.
• Cite this research when discussing the environmental benefits of weight reduction or material optimization in your design project.

Examiner Tips

• Demonstrate an understanding of how material composition directly influences environmental impact.
• Clearly articulate the trade-offs between material properties and sustainability.

Independent Variable: ["Proportion of resin in composite structure","Overall weight of the composite structure"]

Dependent Variable: ["Global warming potential","Ozone layer depletion potential","Environmental impact indicators"]

Controlled Variables: ["Type of composite material (glass fiber and resin)","Ship size and type (52-ft yacht)","Use phase duration (20 years)"]

Strengths

• Employs a recognized methodology (LCA) for environmental assessment.
• Provides a quantitative comparison of environmental impacts between different design iterations.

Critical Questions

• What are the potential performance trade-offs (e.g., strength, durability) associated with reducing resin content?
• How do the costs of materials and manufacturing processes compare between the original and optimized designs?

Extended Essay Application

• Investigate the lifecycle environmental impact of different material combinations for a chosen product.
• Propose and justify design modifications to reduce the environmental footprint of an existing product, using LCA principles.

Source

Environmental Impact Evaluation on Lightweight Structure Design of a Composite Ship by LCA (Life Cycle Assessment) · Journal of the Korean Society for Precision Engineering · 2019 · 10.7736/kspe.2019.36.9.875