24 h creep strains and recovery strains of wood fiber-plastic composites with different wood fiber contents(by mass) were measured.The effects of wood fiber contents on the creep behaviors of wood fiber-plastic composite were discussed.24 h creep curves of wood fiber-plastic composite were fitted by ten element general Kelvin model and Findley's power law model The effects of temperature on the creep behaviors of wood fiber-plastic composite were tested.The results show that the resistances for creep strains of wood fiber-plastic composite are improved by increasing wood fiber contents at various testing conditions.When the wood fiber content increases from 50％ to 70％,the bending strength and elastic modulus of wood fiber-plastic composites are markedly elevated and creep strain in 24 h is reduced by about 58％,and the difference of recovery strain is not as obviously as the difference of creep strain.At 10％ and 20％ loading stress level,the 24 h creep recovery efficient of wood fiber-plastic composite with 50 ％ wood fiber is similar to that with 60％ wood fiber;while,at 30％ loading stress level,the 24 h creep recovery efficient of wood fiber-plastic composite with 60％ wood fiber is similar to that with 70％ wood fiber.Bothten-element general Kelvin model and Findley's power law model fit 24 h creep curves of wood fiber-plastic composites well.The creep strain of wood fiber-plastic composite increases with increasing temperature;however,the creep stain of wood fiber-plastic composite could be restrained by increasing wood fiber content in a certain temperature range.
high density polyethylene(HDPE)wood fiberwood fiber-plastic compositecreepmodel
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NSTL
维普
万方数据
