A reasonably, simply and accurately modified shear-lag model was proposed. Based on the model, the stress redistributions due to the failure of some fibers in an intraply hybrid composite under tension were analyzed. ...A reasonably, simply and accurately modified shear-lag model was proposed. Based on the model, the stress redistributions due to the failure of some fibers in an intraply hybrid composite under tension were analyzed. The results show that the present calculating stress concentration factors very coincide with Fukuda and Chou's results, thus verifying the reasonableness and correctness of the present model and methods.展开更多
The random critical-core model is adapted to investigate the tensile failuremechanism and hybrid effect of unidirectionally arrayed hybrid composites with alternating low andhigh elongation fibers. By utilizing the mo...The random critical-core model is adapted to investigate the tensile failuremechanism and hybrid effect of unidirectionally arrayed hybrid composites with alternating low andhigh elongation fibers. By utilizing the model in conjunction with the results of the stressconcentration analysis in which the interfacial damage between fiber and matrix is considered, amicroscopic statistical analysis of both the first failure and ultimate failure of hybrids isperformed. The variations of the first failure strain, the ultimate failure strain and the hybrideffect as the interfacial shear strength are obtained quantitatively. The concept of the hybrideffect for strains has been clarified. The present results are compared with available experimentdata and a reasonable agreement is found between the analytical predictions and the experimentalresults.展开更多
In the axial tensile failure process of intraply hybridcomposites, the breakage of some fibers may lead to interfacialdamage, thus directly influencing the local stress concentrationsnear the sites of breakage. A modi...In the axial tensile failure process of intraply hybridcomposites, the breakage of some fibers may lead to interfacialdamage, thus directly influencing the local stress concentrationsnear the sites of breakage. A modified shear-lag model, in which theinterfacial damage is considered, is proposed. Based on the model,the influence of interfacial shear strength on the stressconcentrations and the lengths of interfacial damage zone is firststudied. The present results also provide an important theoreticalbasis for investigating the failure mechanism and hybrid effects forsuch kind of composites.展开更多
基金theNationalNaturalScienceFoundationofChina( 1 990 2 0 0 4) theNaturalSci enceFoundationofGuangdongProvince China
文摘A reasonably, simply and accurately modified shear-lag model was proposed. Based on the model, the stress redistributions due to the failure of some fibers in an intraply hybrid composite under tension were analyzed. The results show that the present calculating stress concentration factors very coincide with Fukuda and Chou's results, thus verifying the reasonableness and correctness of the present model and methods.
基金Project supported by the Natural Science Foundation of Guangdong Province(No.000391)
文摘The random critical-core model is adapted to investigate the tensile failuremechanism and hybrid effect of unidirectionally arrayed hybrid composites with alternating low andhigh elongation fibers. By utilizing the model in conjunction with the results of the stressconcentration analysis in which the interfacial damage between fiber and matrix is considered, amicroscopic statistical analysis of both the first failure and ultimate failure of hybrids isperformed. The variations of the first failure strain, the ultimate failure strain and the hybrideffect as the interfacial shear strength are obtained quantitatively. The concept of the hybrideffect for strains has been clarified. The present results are compared with available experimentdata and a reasonable agreement is found between the analytical predictions and the experimentalresults.
基金the National Natural Science Foundation of China(No.19902004) Guangdong Provincial Natural Science Foundation(No.000391)
文摘In the axial tensile failure process of intraply hybridcomposites, the breakage of some fibers may lead to interfacialdamage, thus directly influencing the local stress concentrationsnear the sites of breakage. A modified shear-lag model, in which theinterfacial damage is considered, is proposed. Based on the model,the influence of interfacial shear strength on the stressconcentrations and the lengths of interfacial damage zone is firststudied. The present results also provide an important theoreticalbasis for investigating the failure mechanism and hybrid effects forsuch kind of composites.
