Lifetime Prediction of Wall-Flow Type Diesel Particulate Filters Using Fatigue Characteristics 930128

Lifetimes of DPF under various thermal stress cycles were calculated based on the slow crack growth theory and expected lifetimes were investigated in relation to maximum temperature during regenerations. The fatigue characteristics of porous honeycomb structures follow the slow crack growth theory. Maximum thermal stress was calculated from temperature distributions of failed DPF. The ratio of 4-point bending strength to maximum thermal stress was used as a correction factor. The thermal stress was calculated from various temperature distributions and then modified with the correction factor. These results were compared with the fatigue characteristics obtained from 4-point bending fatigue tests.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.