公开(公告)号：US20090056468A1

公开(公告)日：2009-03-05

申请号：US12100061

申请日：2008-04-09

申请人： Waldemar Kubli ,  Matthias Sester

发明人： Waldemar Kubli ,  Matthias Sester

IPC分类号： G01N3/08

CPC分类号： G06F17/5009 ,  G06F17/5095 ,  G06F2217/16 ,  G06F2217/42

摘要： In the computed-based analysis of forming processes, for example, manufacturing sheet metal parts for the automobile industry, the material loading is represented by major and minor strains εI, εII and is visualised with respect to a forming limit strain curve. In the method according to the invention, one proceeds from a target state (4n) of the material, as has been determined in the computed simulation of the forming process. A proportional trajectory of a loading and thus of the state variables of the material, in particular of the stresses (σ), is determined, which leads to the same target state. The associated proportional strain trajectory is evaluated for this proportional loading trajectory. The strain state (4p) which results from this strain trajectory, is called the equivalent strain state (4p) and may be used in the forming limit strain diagram for assessing the target state. Thereby, the equivalent strain state is set in relation to the forming limit strain curve (1) for the proportional trajectories.

摘要翻译： 在基于计算的成形过程分析中，例如，制造用于汽车工业的金属板零件，材料负载由主要和次要应变ε，εII表示，并且相对于成形极限应变曲线可视化。 在根据本发明的方法中，如在计算的成型过程的模拟中所确定的那样，从材料的目标状态（4n）进行。 确定材料的负载和因此的状态变量（特别是应力（σ））的比例轨迹，这导致相同的目标状态。 对这种比例加载轨迹评估相关的比例应变轨迹。 由该应变轨迹产生的应变状态（4p）被称为等效应变状态（4p），并且可以用于成形极限应变图中以评估目标状态。 由此，相对于比例轨迹的成形极限应变曲线（1）设定等效应变状态。

公开(公告)号：US07870792B2

公开(公告)日：2011-01-18

申请号：US12100061

申请日：2008-04-09

申请人： Waldemar Kubli ,  Matthias Sester

发明人： Waldemar Kubli ,  Matthias Sester

IPC分类号： G01N3/08

CPC分类号： G06F17/5009 ,  G06F17/5095 ,  G06F2217/16 ,  G06F2217/42

摘要： In the computed-based analysis of forming processes, for example, manufacturing sheet metal parts for the automobile industry, the material loading is represented by major and minor strains εI, εII and is visualised with respect to a forming limit strain curve. In the method according to the invention, one proceeds from a target state (4n) of the material, as has been determined in the computed simulation of the forming process. A proportional trajectory of a loading and thus of the state variables of the material, in particular of the stresses (σ), is determined, which leads to the same target state. The associated proportional strain trajectory is evaluated for this proportional loading trajectory. The strain state (4p) which results from this strain trajectory, is called the equivalent strain state (4p) and may be used in the forming limit strain diagram for assessing the target state. Thereby, the equivalent strain state is set in relation to the forming limit strain curve (1) for the proportional trajectories.

摘要翻译： 在基于计算的成型过程分析中，例如制造用于汽车工业的钣金零件，材料负载由主要和次要应变表示，并且对于成形极限应变曲线可视化 。 在根据本发明的方法中，如在计算的成型过程的模拟中所确定的那样，从材料的目标状态（4n）进行。 确定材料的负载和因此的状态变量的比例轨迹，特别是应力（＆sgr）的比例轨迹，这导致相同的目标状态。 对这种比例加载轨迹评估相关的比例应变轨迹。 由该应变轨迹产生的应变状态（4p）被称为等效应变状态（4p），并且可以用于成形极限应变图中以评估目标状态。 由此，相对于比例轨迹的成形极限应变曲线（1）设定等效应变状态。