共查询到19条相似文献,搜索用时 101 毫秒
1.
基于ANSYS/LS-DYNA的板料弯曲成形数值模拟 总被引:3,自引:1,他引:2
根据动力显式有限元理论,利用ANSYS/LS-DYNA软件对TZM合金板料的弯曲冲压过程进行模拟;分析了板料弯曲变形过程,预测了板料在冲压过程中容易产生缺陷的部位,检验了模具结构设计及冲压工艺是否合理,讨论了摩擦因数对成形质量的影响. 相似文献
2.
3.
电瓶支座弯曲成形及其回弹模拟分析 总被引:1,自引:1,他引:0
本文利用Dynaform板料成形软件的动态显式与静态隐式联合求解功能,模拟了汽车电瓶支座冲压弯曲成形和卸载回弹变形整个过程.通过改变工艺、材料和模拟的参数值,模拟得到影响该零件回弹的主要影响因素及其规律.并成功利用这些规律进行了弯曲工艺参数的优化、模具加工和试模生产. 相似文献
4.
5.
《塑性工程学报》2015,(6):52-57
针对盒形冲压件成形过程中易出现破裂、起皱和回弹过大的问题,采用有限元分析软件DYNAFORM对顶部弧面、侧壁直边的磁体外盖进行拉延、切边和回弹过程模拟,分析制件成形规律;采用正交实验法模拟研究压边力、凹模圆角半径、模具间隙和冲压速度等工艺参数对制件冲压成形的影响。以制件的最大减薄率和回弹量为评价指标,采用极差和方差分析法对模拟结果进行分析表明,各工艺参数对评价指标的影响显著性,得到的最佳工艺参数优化组合为压边力120kN、凹模圆角半径3mm、模具间隙1.05t、冲压速度6m·s-1。采用优化工艺参数组合进行模拟和冲压实验,获得了较好的评价指标值,实验结果与模拟结果相吻合。 相似文献
6.
7.
板料冲压过程是一个非常复杂的塑性成形过程,许多因素都直接或间接影响着成形的结果.以Forge2D软件为平台,采用弹塑性有限元法对某一汽车轮毂零件的成形过程进行数值模拟,揭示零件冲压过程中板料的变形行为,预测冲压过程中可能出现的各种工艺缺陷,例如坯料的局部减薄和破裂,并以模拟结果为依据提出改进工艺参数的办法,优化工艺参数,可以减少调试和修模的次数,以此实现降低模具费用、缩短制模时间、提高产品成品率和材料利用率,最终达到减少产品成本的目的.在此基础上,对3种冲压工艺方案分别进行了数值模拟,对比研究了各方案的成形特点,得出了较好的成形工艺参数方案. 相似文献
8.
9.
为了减少汽车异形不锈钢板件在冲压过程中的模具磨损,应用CAE分析软件Deform-3D对板料冲压过程进行数值模拟,并基于响应面法,以凸、凹模的磨损深度为优化目标,对冲压工艺参数进行优化。采用Box-Behnken设计冲压试验组,并结合Archard模型,建立了压边力、冲压速度、冲压间隙与评价参数之间的响应面模型,得到了各工艺参数对模具磨损的影响规律,综合分析后,确定了最优冲压工艺参数组合为:压边力为375 kN、冲压速度为78.5 mm·s-1、冲压间隙为2.17 mm。同时,根据最大磨损深度结果对冲压模具的寿命进行了预测,最终经过冲压实践证明,采用最优冲压工艺参数组合,冲压模具的实际寿命为3721件,与预测结果的一致性较好,模具寿命得到大幅提升。 相似文献
10.
11.
In this article, the elastic-plastic finite element formulations using dynamic explicit time-integration schemes are proposed
for numerical analysis of automotive body panel stamping processes. A general formulation of finite element simulation for
complex sheet forming processes with arbitrarily shaped tools is briefly introduced. In finite element simulation of automotive
body panel stamping processes, the robustness and stability of computation are important requirements since the computation
time and convergency become major points of consideration besides the solution accuracy due to the complexity of geometry
and boundary conditions. For analyses of more complex cases with larger and more refined meshes, the explicit method is more
time effective than the implicit method, and it has no convergency problem and has the robust nature of contact and friction
algorithms, although the implicit method is widely used because of excellent accuracy and reliability. The elastic-plastic
scheme is more reliable and rigorous, while the rigid-plastic scheme requires short computation time. The performance of the
dynamic explicit algorithms is investigated by comparing the simulation results of forming of complex-shaped automotive body
parts, such as a fuel tank and a rear hinge, with the experimental results. It has been shown that dynamic explicit schemes
provide quite similar results to the experimental results. It is thus shown that the proposed dynamic explicit elastic-plastic
finite element method enables an effective computation for complicated automotive body panel stamping processes. 相似文献
12.
13.
本文基于连续介质力学及有限变形理论 ,建立了用于三维板料成形过程分析的有限元模型 ,开发了动力显式算法的板料成形过程模拟的有限元分析程序DESSFORM3D。采取集中质量矩阵 ,用动力显式积分的方法 ,使位移计算显式化 ,避免了由材料、几何、边界条件等高度非线性因素引起的计算收敛问题。对半球形凸模拉深过程进行模拟计算 ,并把模拟结果与实验结果进行对比 ,验证了软件的计算结果 相似文献
14.
15.
16.
17.
18.
19.
M. J. Finn P. C. Galbraith L. Wu J. O. Hallquist L. Lum T. -L. Lin 《Journal of Materials Processing Technology》1995,50(1-4):395-409
LS-DYNA3D, an explicit code, and LS-NIKE3D, an implicit code, have been coupled to facilitate the finite element (FE) modelling of sheet metal forming. The explicit FE code is used to model the forming process, in which the deformable blank contacts rigid tools. The implicit FE code is used to model the subsequent spring-back which occurs after the tooling is removed. In this way, the explicit code with its robust handling of contact during forming is combined with the implicit code and its large time steps during spring-back. The result is an efficient method for solving even very large (>20 000 deformable elements) sheet forming models. Three examples of the application of this method are given. 相似文献