更新材料

This document provides minimum requirements and reference material applicable to the content, origination, publication, updating, and enhancement of aerodrome mapping information.

这份文件提供的最低要求和参考材料适用的内容，起源，出版，更新，和增强的机场映射信息。

Define and update the bill of materials.

定义和更新产品生产材料清单。

Four-node degenerated shell element and rigid shell element are used in our FEM model.Updated Lagrange formulation and rate form constitutive equation are adopted to solve the problem of large strain and large rotation in sheet forming process.Sheet metal material property is described by plastic anisotropy yielding model and isotropic hardening model.Master surface-slave surface contact model is used to define the contact between tools and blank.Contact constraints are enforced with a kinematic algorithm and friction stress is computed by Coulomb friction law.Dynamic relaxation method is used to treat springback after forming stroke.

四结点蜕化壳单元和刚体壳单元分别用来建立板和模具的有限元模型；更新Lagrange法和速率型本构关系被用来处理板料变形中的大应变和大转动；材料模型采用塑性各向异性屈服与等向强化模型；通过主从面模型定义板料和模具的接触，接触算法采用运动约束法，摩擦力用库仓定律计算；并利用动力松弛法对回弹过程进行了计算。

To establish the constitutive equation of material, the metric tensor for stress , strain and their transformation equations between different configurations are derived, and basic theory of finite deformation as well as elasto-plastic deformation criterion are studied. By analyzing the applicability of different element models, four-node quadrilateral degenerated Mindlin isoparametric element is adopted because of its good versatility, and the element stiffness matrix is derived. The static implicit elasto-plastic finite element equation for complex skin stretch-forming is put forward based on Updated Langrange formulation.

本文首先系统地阐述了有限变形的相关基本理论，针对板料成形建立了应力应变度量张量及其相应的转换关系；介绍了材料的屈服准则、塑性变形强化规律、塑性流动规律以及加、卸载准则，并在此基础上建立了有限变形各向异性弹塑性本构方程；对板料成形的单元模型进行了分析，针对飞机蒙皮零件特点，采用通用性强的四节点四边形退化Mindlin等参壳单元进行成形模拟，并导出其单元刚度矩阵的具体形式；基于以上研究，以逐级更新Langrange描述的持续虚功率原理为基础，建立了率形式的复杂蒙皮拉形过程静态隐式弹塑性有限元方程。

In recent years due to the rapid development of science and technology, plastic Plastic products industry research and development of materials have been updated, and market competition, quality demanding, the company's various processing equipment machinery continued innovation from the traditional human operation of the plant to the improved automatic equipment from the processing quality of the basic requirements to The most stringent test data, I must in the field of technology and management create more efforts to meet the needs of loyal customers.

近年来由于科技的突飞猛进，塑胶产品行业的材料也不断研发更新，加上市场竞争、品质苛求，本公司的各种加工设备机器不断推陈出新，从传统人力操作的机台到改良型全自动设备；从加工品质的基本要求到最严苛的数据检验标准，我公司必须在技术领域与管理制造上更加努力不懈，以满足忠实的客户需求。

In my novel named Notes Taken by a Dream-reader written in 2001, I portrayed such a world: Human cultures were supposed to be "dreams" accumulated in generations of craniums, and dream-readers were guardians and interpreters of these ancient dreams who assisted the dreams to go into palingenesis.

拿申请材料中的一段来混更新吧。下面附上英文版的，我自己译的哦。大家有兴趣的话挑挑毛病。

Issue material to relevant departments according to picking list and update data in ERP system timely.

根据取料单对相关部门分发材料，及时更新ERP系统。

Using the Updated Lagrange finite element method and the elastic-plastic large deformation finite element formula based on virtual work-rate principle of finite deformation, the author studies in detail the plastic flow rule of MPF, including the influence of the work hardening index, friction, thickness of sheet, material, number and position of the punch.

作者采用逐级更新Lagrange法以及有限变形虚功率增率原理的弹塑性大变形有限元法，详细研究了金属板材多点成形的塑性流动规律，包括加工硬化指数、摩擦系数、板料厚度、材料、冲头个数及位置等对成形的影响，同时探讨了分段成形时的金属流动规律。

Now in its eighth edition, Volume 1 has been fully updated in line with the 17th Edition IEE Wiring Regulations (BS 7671:2008) and references the material covered to the Wiring Regs throughout.

在第八版现在，第1卷已全面更新，与第17版独立外部接线条例（学士7671：2008）和引用的内容包括有关线路Regs整个材料的线。

Replacement cost assumes the use of modern materials, techniques and designs.

更新重置成本假定采用现代材料、技术和设计。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。