The results indicate that FEM can realize the complex strain paths and different strain paths will affect the result of sheet metal forming greatly.
研究结果表明：有限元数值模拟可以实现复杂应变路径； 应变路径的不同对冲压成形的结果有很大影响。
Strain-based FLD is strongly affected by the strain path and has brought much inconvenience to the study of forming limit under complex strain paths.
因极限应变构成的FLD受应变路径的影响很大，在研究复杂应变路径的成形极限问题时带来极大不便。
In numerical simulation minimum thickness was taken as forming limit criterion. The research on the relation between minimum thickness and strain paths was carried out.
在数值模拟中应用最小厚度作为成形极限判据，研究最小厚度值与应变路径的关系。
The results show that the different CD moving paths have little effect on the strain paths of box sidewall and die corner, which have significant effect on punch corner.
研究表明不同可控拉深筋路径对盒形件侧壁和凹模圆角部位的应变路径影响不大，而对凸模圆角处的影响较为显著。
The result shows that FLSD is independent of strain path, and that the FLSD under different strain paths are almost the same curve according to the same instability theory.
结果表明，成形极限应力图不受应变路径影响，对于同一失稳准则，在不同加载应变路径下几乎为同一条曲线。
The thesis validates through actual experiments that FLSD is much more reliable and effective than the strain-based FLD in determining the multistage part formability under complex strain paths.
本文通过实例验证了FLSD在判断复杂应变路径下的多道次零件成形比基于应变的成形极限图更加可靠、有效。
The result shows that the FLSD under different strain paths are almost the same curve according to the same instability theory and it's more convenient to use FLSD as the criterion of forming limit.
结果表明，对于同一失稳准则，在不同加载应变路径下FLSD几乎为同一条曲线，FLSD作为复杂加载路径板料成形极限判据更加方便。
The results showed that the characteristics of cyclic hardening or softening depend to the strain loading paths and the loading parameters.
研究结果表明，低周拉扭疲劳加载下，拉与扭应力响应的硬化与软化特性取决于应变加载路径和加载参数。
Experiments on the material properties of Q235 steel under different stress-temperature paths were conducted to learn the influence of stress-temperature history on the steel strain.
介绍了不同应力-温度路径下q 235钢材性能的试验，以研究应力-温度历史对钢材应变的影响。
Various loading and unloading paths are carried in servo-controlled testing machine to study the relationships among axial stress, strain, confining pressure and circumference deformation.
在伺服试验机上对岩样进行了多种路径的加载、卸载试验，分析岩样轴向应变、环向变形与轴向应力、围压之间的关系。
Finally, different stress paths and strain areas would lead to different attenuation trends.
但应力路径、应变范围不同其衰减幅度不同。
Scanning paths are decided based on the perpendicular relationship of strain and scanning paths.
目前，对于是否存在稳定的扫描路径还存在争论。
The trace algorithm proposed does not request the continuity of strain localization propagation paths, and the interaction among localization band segments can be taken into account.
该算法不要求追踪路径的连续性，并可充分考虑各局部化带间的相互影响。
The part of optic paths includes optical fiber strain sensor, lamp-house, optical fiber coupling instrument and light dispersion equipment.
光路部分包括光纤传感器、光纤、光源、光纤耦合器以及设计的解调光路部分。
When the sand is loaded along the constant strain increment ratio paths, the ratio of lateral to axial stress will eventually approach a constant value, i. e. the asymptotic stress ratio.
当沿着等应变增量比路径加载时，应力比最终趋于一个常数，即渐近状态的应力比；
The device can be applied in the investigation of stress-strain behavior of sand loaded along constant strain increment ratio paths.
研制开发的试验设备可用于研究砂土在等应变增量比加载条件下的应力应变响应。
The device can be applied in the investigation of stress-strain behavior of sand loaded along constant strain increment ratio paths.
研制开发的试验设备可用于研究砂土在等应变增量比加载条件下的应力应变响应。
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