What is thermal growth?

Thermal growth refers to the phenomenon where materials expand in size when subjected to an increase in temperature. As temperature rises, the atomic or molecular structure of materials tends to occupy more space, leading to an increase in overall dimensions. This is a fundamental principle of thermodynamics and material science applicable to various materials, including metals, plastics, and ceramics.

Understanding thermal growth is important in engineering and design since components that experience temperature fluctuations—like those found in engines or machinery—must account for this expansion to prevent deformation, misalignment, or failure of parts. Proper tolerancing and design considerations are made to accommodate expected thermal growth, ensuring the components work effectively under operating conditions.

This understanding helps engineers in many fields create systems that operate reliably, as materials will naturally change size with temperature variations.