nonlinear viscoelasticity meaning in English
非线性粘弹性
Examples
- High molecule physics and the damage theory of rheologic material with lacuna are used in experiments to study the pmma ' s nonlinear viscoelasticity and changing depends on time and temperature when distorting and destroying . we try to seek a common rule to polymer ' s crazing damage , offer a viable damage model and measure to research polymer ' s minute damage
本文运用高分子物理、含缺陷流变性物体的材料破坏等理论，以实验为基础，对聚合物变形、破坏以及时间相依和温度依赖性等非线性力学行为进行研究，试图寻求聚合物银纹损伤的一般规律，为研究聚合物的细观损伤提供了一种可行的损伤模型与方法。 - ( 2 ) using craze density dcraze ( , ) to illustrate the damage degree of material , considering strain equivalent hypothesis , non - linear visco - elastic constitutive equation of pmma taken into consideration of the operation of craze damage is arrived . the pmma sheet is loaded under different forces to validate the non - linear visco - elastic constitutive equation with damage . the result shows that the theory curves obtained by the nonlinear viscoelasticity constitutive relation agrees with experimental data considerably well
( 2 )用银纹密度d _ ( craze ) ( ， t )来描述材料的损伤度d ，在考虑应变等效性假设的基础上，得到了pmma材料考虑损伤的非线性粘弹性材料的本构关系，运用此方程对材料在不同载荷水平下进行蠕变实验，从而对蠕变条件下的应变响应进行模拟和预报。 - In this paper , we take high molecule physics and the damage theory of rheologic material with lacuna as the basic , make the experiment as a mostly measure , take the pmma as a research object , to study the pmma ' s nonlinear viscoelasticity of high polymer . the technique showing minute details in minute view measure is used by the author to observe the change of crazing damage density follow the change of stress , time and temperature in term of creep and flab
本文以高分子物理学、含缺陷流变性物体的材料破坏理论为基础，以实验为手段，以工程中常用的pmma为研究对象，对pmma银纹破坏的非线性力学行为进行了研究。作者采用显微技术，对pmma在蠕变或松弛条件下，不同应力水平和不同基温下的pmma银纹损伤进行了实验研究。 - The main purpose of this paper is to study crack growth rate of a class of nonlinear viscoelastic materials under the condition of constant load and small - strain . in this paper : the new test program is raised by referencing the existing test programs and by our trial and error ; in the new test program , facilities involved in the nonlinear viscoelastic crack tests are relatively few , the test process is relatively simple and the data obtained from the experiments are credible . on this basic , the calculation of j integral of nonlinear viscoelastic double cantilever beams specimens and the parameter of fracture work of corresponding nonlinear viscoelasticity are derived
具体成果包括： 1 、证实了双悬臂梁试件用于非线性粘弹性裂纹扩展实验研究的优点：双悬臂梁试件在实验中能观测到的扩展过程持续时间比较长，在计算j积分时，计算方法简单； 2 、得到了改性聚丙烯材料用于非线性粘弹性裂纹扩展实验的两种有效的试件构形和相应的试件尺寸；采用不断改善夹具的方法使得加载稳定； 3 、经过连续四个多月的时间得到了一组有用的实验数据； 4 、得到了裂纹长度与时间的关系、裂纹扩展速度与时间的关系、裂纹扩展速度与裂纹长度的关系。