中文摘要：

The mechanisms of interracial debonding of particle reinforced theological materials arestudied.Based on an energy criterion,a simple formula of local critical stress for interfacial debondingis derived and expressed in terms of the interfacial energy.The particle size effect on interface debond-ing can then be analyzed easily owing to the fact that critical stress is inversely proportional to thesquare root of particle radius.By taking PP/CaCO₃ system as an example,the present energy criterionis compared with the mechanical debonding criterion,and it is found that under the condition that bondstrength is equal to matrix strength and particle radius not over 0.2μm,the mechanical debonding cri-terion can be automatically satisfied if the energy criterion is satisfied.A relation between critical timeand interface energy is calculated by using the energy criterion.The influences of the particle volumefraction and the parlicle size,the loading rate and the relaxation time of the matrix on the critical timeof interfacial debonding are also discussed.

英文摘要：

The mechanisms of interfacial debonding of particle reinforcedrheological materials are studied. Based on an energy criterion, asimple formula of local critical stress for interfacial debonding isderived and expressed in terms of the interfacial energy. Theparticle size effect on interface debond- ing can then be analyzedeasily owing to the fact that critical stress is inverselyproportional to the square root of particle radius. By takingPP/CaCO_3 system as an example, the present energy criterion iscompared with the mechanical debonding criterion, and it is foundthat under the condition that bond strength is equal to matrixstrength and particle radius not over 0.2μm, the mechanicaldebonding cri- terion can be automatically satisfied if the energycirterion is satisfied.