HYCRASH

HYCRASH 功能
根据现有的碰撞模拟模型，计算成形金属板的厚度和塑性应变。该结果将作为 LS-DYNA 模拟的初始条件。

众所周知，钣金成形（大多数汽车碰撞能量吸收部件的制造工艺）产生的残余应变分布和厚度不均匀效应是影响分析与试验之间相关性的最重要因素之一。因此，在进行碰撞/强度分析之前，人们会尝试计算初始应变和厚度。

通常，碰撞分析和金属成形分析的元素尺寸由于几何信息（R尺寸等）的差异而不同，因此在成形分析之后，应力、应变和厚度被映射到结构分析中。

然而，该工艺成本较高且效率不高，而且成形分析需要模具几何信息，而这些信息在结构分析阶段通常不存在。

为了解决这个问题，JSOL 公司开发了“HYCRASH”，一款易于使用的一步式求解器。HYCRASH 仅需要面板的几何形状即可计算制造工艺效应，无需模具的几何形状。此外，由于该求解器用于碰撞/强度分析，因此甚至不需要成形分析数据。如果仅存在碰撞/强度分析数据并定义了面板 ID，HYCRASH 便会提取面板来计算其应变和厚度，并将其映射到原始数据。

The effect of residual strain distribution and non-uniform thickness due to sheet metal forming - the manufacture process for most of the automotive parts for crash energy absorption - is well known as one of the most affecting factors for correlations between analysis and tests. So that some tries are carried out to calculate the initial strain and thickness before the crash/strength analysis.
Usually, the element size for crash analysis and metal forming analysis are different due to their difference in geometrical information (R size etc.), so after forming analysis, stress, strains, and thickness are mapped to the structural analysis.
However, this process costs pretty much and not very effective. Moreover, the information of die geometry is required for the forming analysis, which usually doesn't exists in structural analysis phase.

To overcome this, JSOL Corp. has developed "HYCRASH", easy-to-use one step solver.
HYCRASH only requires the panels' geometry to calculate manufacturing process effect, geometry of die are not necessary. Additionally, as this is target to usage of crash/strength analysis, even forming analysis data is not needed. If only crash/strength analysis data exists and panel ids is defined. HYCRASH extract panels to calculate it's strain, thickness, and map them to the original data.

HYCRASH Execution process

The good points of HYCRASH are,

• Only part geometry is required; die geometry, holder force are not needed.
• Special skill for forming analysis I not required. Only crash data is needed.
• Very quick calculation time; a few minutes to a few ten minutes in Windows desktop computer.