{"id":311,"date":"2025-07-16T07:50:49","date_gmt":"2025-07-16T07:50:49","guid":{"rendered":"https:\/\/tuoyuan.waituo.tech\/coefficient-of-thermal-expansion-definition-acrylic-glass-metal\/"},"modified":"2025-07-16T07:50:49","modified_gmt":"2025-07-16T07:50:49","slug":"coefficient-of-thermal-expansion-definition-acrylic-glass-metal","status":"publish","type":"post","link":"https:\/\/tuoyuan.waituo.tech\/fr\/coefficient-of-thermal-expansion-definition-acrylic-glass-metal\/","title":{"rendered":"What is the Coefficient of Thermal Expansion?"},"content":{"rendered":"
\"Coefficient<\/figure>\n\n\n\n

D\u00e9finition en une phrase<\/h2>\n\n\n\n

The coefficient of thermal expansion (CTE) is a material property that quantifies how much a material expands or contracts in response to temperature changes, typically expressed as the fractional change in length per degree Celsius or Kelvin.[C-Therm]<\/a><\/p>\n\n\n\n

Explication d\u00e9taill\u00e9e<\/h2>\n\n\n\n

When materials are heated, their molecules move apart, causing the material to expand. The CTE measures this tendency, providing a crucial parameter for engineers and designers. For solids, the linear coefficient of thermal expansion (\u03b1) is most commonly used and is defined by the formula:<\/p>\n\n\n\n

\u03b1 = \u0394L \/ (L\u2080 \u00d7 \u0394T)<\/strong><\/p>\n\n\n\n

where \u0394L is the change in length, L\u2080 is the original length, and \u0394T is the temperature change. Plastics, such as acrylic (PMMA), generally have much higher CTE values than metals or glass, meaning they expand and contract more with temperature fluctuations.[Wikipedia]<\/a><\/p>\n\n\n\n

Composants cl\u00e9s<\/h2>\n\n\n\n