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以樟子松为研究对象,利用横纹压缩蠕变试验研究其木材吸能特性与黏弹性的关系。结果表明:樟子松木材在静态横纹压缩径向加载时,存在明显三段式曲线,第2阶段平台区体现了良好的能量吸收特性;樟子松木材横纹压缩时的短期蠕变行为可用四元件流变模型进行描述;随着应力水平的上升,樟子松木材的瞬间弹性模量和Kelvin模型中的延时弹性模量及黏性系数均呈上升趋势,而Maxwell模型中的黏性系数和松弛时间呈明显下降趋势;在蠕变时,随着应力水平的上升,樟子松木材的能量吸收能力增加且缓冲系数呈下降趋势。
Taking Pinus sylvestris var.mongolica as the research object, the relationship between energy-absorbing properties and viscoelasticity of wood was studied by the transverse compression creep test. The results showed that there was a clear three-stage curve when the Pinus sylvestris var. Mongolicagrass was radially loaded by static transverse compression, and the second stage plateau region showed good energy absorption characteristics. Short-term creep behavior of Pinus sylvestris var.mongolicaw Can be described by the four-element rheological model. With the increase of stress level, the instantaneous elastic modulus of Pinus sylvestris var. Mongolica and the delayed elastic modulus and viscosity coefficient of Kelvin model all show an upward trend, while the viscosity of Maxwell model The coefficient of sex and relaxation time decreased obviously. With the increase of stress level, the energy absorption capacity of Pinus sylvestris var. Mongolica increased and the buffer coefficient decreased.