Meaning
Mathematical formulas representing chemical reaction acceleration as a function of temperature provide the foundation for estimating the lifespan of electronic and mechanical assemblies. The arrhenius degradation model utilizes the exponential relation between temperature and rate constant to estimate the long-term reliability of components under normal operation by testing them at elevated temperatures. It focuses on the chemical transition states that lead to mechanical or electrical failure.
This tool is widely used to plan accelerated stress testing for high-reliability components.
Thermal Activation
Calculated energy thresholds dictate how quickly a material degrades under thermal stress. For the arrhenius degradation model, the activation energy of the specific failure mechanism must be determined through multi-temperature testing. An incorrect activation energy value leads to inaccurate life predictions and either premature failures or excessive material costs.
Boundary Condition
Transition temperatures or phase changes constrain these tests. If the test temperature exceeds these transition points, the arrhenius degradation model becomes invalid. This is because new failure mechanisms are activated.
Product Readiness
Accelerated life testing provides the statistical confidence needed to release a design from prototype to high-volume manufacturing. When production units are subject to the arrhenius degradation model, the resulting data validates that the design can meet the warranty requirements before full capital allocation. This run establishes a baseline for component selection and supplier qualification.
