Abstract Ehelby tensor in view of the entire differential method of ‘extraction- accession’ during the process of change in modulus variation is less. Then, an approximate explicit expression of the differential method is established. The simple form of approximate solution is facilitating to calculation. The expression can be fit for sphere and stochastic short fiber. Its result approximates to the experimental result. It can have a better application in the practical engineering.
2011, Vol. 32 
