The ways of founding the characteristic line equation for adaptive incremental bending is feasible to realize numerical control of the bending process.
自适应增量弯曲特征线方程的建立思想，对于实现零件数控弯曲成形过程是可行的。
2
Theories and technologies of live line measurement have appeared, including the interference method, the incremental method, the differential equation method and the integral equation method.
When the stree strain relationship is the weak hardening, the relationship between stress ratio and strain incremental ratio shows the straight line with two different slopes.