How to establish creep model of under change loads are unfathomed contents in theory studies and applications of wood rheology.
如何建立木材在变载荷下蠕变的数学模型，是木材流变学在理论研究和生产应用中迄今尚未解决的问题。
One important conclusion is that nonlinear creep theory gives almost the same results as those of linear one, but gives rather different results from those of strain-softening model.
计算表明，非线性理论的结果与线性理论的结果相差不大，而拉应变软化模型的结果与前两者有较大差异。
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