Strain analysis for ceramic foam as filtering material under impact load

Ceramic foam used as filtering materials for purifying diesel exhaust will be subject to high-speed impact of gas. The impacted process for ceramic foam was simulated based on ANSYS finite element software in this paper, the strain distribution and the damage characteristics of materials were studied in different parameters. The results show that when the shear stress exceeds the yield limit of materials, the surface of foam structure is crushed; The flow and schedule of the strain transmit is so acutely because of the reticular structure of the ceramic foam. Since impact is transient process, the changes of impact time has less effect on the strain peak; The change trend of strain value accords with the variation trend of the impact force.