fracturing work meaning in English

压裂作业

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。