How do artists address thermal expansion gaps in polyethylene multi-part sculptures?

Artists working with polyethylene multi-part sculptures face unique challenges due to thermal expansion, which can cause gaps or distortions over time. To address this, they employ several strategies:

1. Material Selection: Using high-density polyethylene (HDPE) or linear low-density polyethylene (LLDPE) with lower thermal expansion rates.

2. Design Flexibility: Incorporating overlapping joints or sliding mechanisms to accommodate movement without visible gaps.

3. Modular Construction: Creating sculptures in smaller, interlocking sections that expand independently while maintaining structural integrity.

4. Gap Fillers: Applying flexible sealants or elastomeric materials that stretch with temperature changes.

5. Environmental Considerations: Installing sculptures in shaded or temperature-stable locations to minimize expansion stress.

By combining these techniques, artists ensure their polyethylene sculptures remain visually cohesive and durable despite thermal fluctuations.