A comprehensive investigation on the damage induced by the …
2022年1月1日 · In this paper, the damage in the sheared edge of DP780 steel is investigated by microstructure characterization, micro/macro mechanical property evaluation, and numerical simulation. Microvoids, microcracks, and work hardening behavior are identified as damage factors affecting the sheared edge cracking.
文中基于ABAQUS 有限元分析,对DP780 高强钢U形件进行数值模拟,模型采用U 形弯曲模具尺寸,研究4种不同参数的取值对回弹的影响。 在此前提下,通过正交试验选出一组合理取值,使其回弹最小。
A novel finite element simulation of hot stamping process of DP780 ...
The numerical simulation of the warm U-shaped deep drawing process of DP780 steel sheets was done in the ABAQUS software based on the forward Euler explicit integration scheme. A temperature-dependent Chaboche hardening model and Yld2000-2d yield criterion was used via UMAT and VUMAT user subroutines.
Temperature Dependency of Modified Mohr–Coulomb …
2024年6月17日 · The numerical simulation program was prepared using the Abaqus Explicit user material subroutine and compared to the test results. The objective of this study was to determine the fracture criterion parameters of DP780 at temperatures ranging from 298 K to 873 K and to investigate the relationship between these parameters and temperature.
基于Chaboche热力学硬化模型的DP780钢热冲压过程的新型有限 …
在本文中，研究了温度升高对DP780钢热冲压过程中可能产生的回弹量的影响。 为了获得对硬化行为的正确描述，已将一种Chaboche热力学本构模型与各向异性的Yld2000-2D屈服准则一起使用。 由于在加载和卸载阶段AHSS的弹性模量会对回弹产生很大影响，因此有必要考虑将杨氏模量作为等效塑性应变的函数。 此外，通过使用UMAT和VUMAT用户定义的子例程的ABAQUS软件模拟该过程，并应用前向Euler显式积分方案来计算时间增量结束时的应力和应变。 结果证明了新颖 …
An application of fully coupled ductile damage model considering ...
2020年8月17日 · For the application, the simulations were conducted for U-draw bending of as-received DP 780 steel sheet proposed by Numisheet’2011 Benchmark. The proposed model was able to capture adequately the Bauschinger effect, transient hardening (distortional) and ductile damage-induced softening.
Strain hardening response and modeling of EDDQ and DP780 …
2013年9月1日 · For DP780 steel, a significant Bauschinger effect accompanied by a transient hardening behavior after reverse loading was the prominent phenomenon. In contrast, EDDQ exhibited stress overshooting followed by strain hardening stagnation with respect to the monotonic flow curve near cross-loading conditions.
Microstructure-Based RVE Approach for Stretch-Bending of
2016年1月28日 · While in DP780, the martensite phase shows more continuous than the ferrite phase, ferrite phase is divided into islands and phase boundaries of ferrite are traced. The microstructure-based RVE geometric models are then imported into ABAQUS/Standard after marking the phase boundaries.
Constitutive modeling of evolving plasticity in high strength …
2016年3月1日 · In this paper, biaxial tensile tests with cruciform specimens were conducted to obtain the experimental plastic work contours of DP590, DP780 and DP980 sheets. It was found that for high strength dual phase steel sheets, the outlines of the experimental work contours in the first quadrant evolve evidently with the increase of plastic dissipation.
Research on Forming Limit Stress Diagram of Advanced High
2023年6月23日 · Nakazima dome test is a common method for determining FLD. In this paper, Nakazima tests are carried out on four kinds of DP steel, DP590, DP780, DP980 and DP1180. The forming process of four kinds of DP steel was simulated and analyzed by using the user material subprogram of Abaqus Explicit.