In the field of reliability engineering, life acceleration models are a key tool for predicting product life. By selecting appropriate acceleration models, traditional lifespan testing that takes years can be shortened to a few weeks, significantly improving research and development efficiency. In practical applications, it is necessary to verify the applicability of the model by combining the failure mechanism, in order to avoid the deviation of failure modes caused by overstress.

1. Arrhenius Model
Applicable scenarios: Temperature is the main acceleration stress, suitable for electronic components, insulation materials, and other scenarios where high temperatures accelerate chemical reactions.
Corresponding experiment:
High Temperature Operating Life (HTOL): Continuously testing the lifespan of the device under high temperature (such as testing the stability of the laser device at 85 ℃)
High temperature storage life test: Evaluating the long-term reliability of devices in high-temperature storage environments (such as storing LED beads at 125 ℃)
2. Inverse Power Law Model
Applicable scenarios: Suitable for accelerated testing of non thermal stresses such as voltage, current, and mechanical stress, such as capacitors and mechanical components.
Corresponding experiment:
Power Temperature Cycle (PTC): Combining temperature and power stress to simulate the lifespan of analog devices under dynamic loads (such as pulse power testing of lasers)
High temperature reverse bias (HTRB): Testing the voltage resistance of photodiodes or lasers under high temperature and high reverse voltage
3. Coffin Manson Model
Applicable scenarios: Suitable for failures caused by temperature cycling or mechanical fatigue, such as thermal expansion failure of welded joints and metal materials.
Corresponding experiment:
Temperature Cycle (TC): Quickly switch between extreme temperatures (such as -40 ℃) ↔ 125 ℃ cycling) to verify the thermal fatigue resistance of the device
Thermal shock test: Simulating mechanical stress in extreme environments through rapid switching between liquid nitrogen and high-temperature tanks
4. Eyring Model and Peck Model
Applicable scenarios: Accelerated testing under comprehensive temperature and humidity stress, such as PCB boards, packaging materials, etc.
Corresponding experiment:
High temperature and high humidity working life (WHTOL): Test the moisture resistance of LED or laser under 85 ℃/85% RH conditions
Mixed gas corrosion test: Evaluating the reliability of devices in corrosive gases such as hydrogen sulfide (H2S)
5. Lawson Model
Applicable scenarios: Accelerated testing in steady-state humid and hot environments, such as moisture resistance testing of automotive components in a parked state.
Corresponding test: Damp heat aging test.

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