Production & Quality
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EEA Poor Fatigue Resistance
Problem Phenomenon
EEA product fatigue life <10⁴ cycles, below the 10⁵ cycles requirement
Cause Analysis
EEA elastic recovery insufficient, plastic deformation accumulates with each cycle; crosslinking degree low, fatigue crack propagation fast
Solution
1) Increase crosslinking degree to improve recovery and reduce accumulated deformation; 2) Select high-molecular-weight grades to increase the fatigue threshold; 3) Product design to reduce stress concentration
Key Takeaway
Poor fatigue resistance is caused by insufficient recovery and fast crack propagation; increasing crosslinking is key
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