the experimental results have showed that the deformation of polymer in macro cold tension stage is the accumulation and concentration of local deformation in the step of necking down and propagation.
结果表明,高分子材料小拉形变量是在缩颈扩展阶段发生局部集中形变的累积量;
if this arc voltage saltation information can be extracted, we will get the characteristic information of necking down formation.
若能从电弧电压信号中提取出拐点发生时突变的信息,则可望提取到缩颈发生的特征信息。
meanwhile the author has presented its own ideal of material budget for necking down forming method as well as the precautions.