CAJ | 학술논문

通过对PP木纤维复合材料进行应变率为10-4～10-2s-1、温度为90、130、170℃下的单向应力条件下的力学性能试验,结果表明,PP木纤维复合材料的力学响应对温度和应变率都是敏感的,并且升高温度与降低应变率对PP木纤维复合材料的力学性能有等效的影响。利用Maxwell模型提出了该PP木纤维复合材料的一个非线性热粘弹性本构方程,拟合出了相应的粘弹性参数。利用该本构模型模拟了PP木纤维复合材料的热压缩实验,理论计算所得应力-应变曲线与实验结果吻合较好。
통과대PP목섬유복합재료진행응변솔위10-4～10-2s-1、온도위90、130、170℃하적단향응력조건하적역학성능시험,결과표명,PP목섬유복합재료적역학향응대온도화응변솔도시민감적,병차승고온도여강저응변솔대PP목섬유복합재료적역학성능유등효적영향。이용Maxwell모형제출료해PP목섬유복합재료적일개비선성열점탄성본구방정,의합출료상응적점탄성삼수。이용해본구모형모의료PP목섬유복합재료적열압축실험,이론계산소득응력-응변곡선여실험결과문합교호。
PP wood composite specimens were tested at strain rates from 10^-4 to 10^-2 s^-1 and at temperature of 90, 130, 170℃. Their mechanical responses were shown to be sensitive both to the strain rate and temperature. Besides, it was found that raising the temperature has an equivalent effect as decreasing the strain rate. Based on maxwell model, a nonlinear thermal viscoelastic constitutive model was proposed for the PP wood Composite. Corresponding viscoelastic parameters were obtained through curve fitting with experimental results. Then the model was used to simulate thermal compression of the wood composite. The predicted theoretical results coincided quite well with experimental data.