Progressive damage modelling of SMC composite materials

The present work deals with the modelling of damage behaviour for sheet moulding compound (SMC) composite materials using a finite element analysis package. Specifically, a comparison is made between the results obtained experimentally for a three-point bending test, and those obtained from numerical simulation using a material model already implemented. The simulation has been performed for the material models available within the PAM-CRASH software. The simulation results are compared and validated with respect to experimentation.     

Universal Rendering Sequences for Transparent Vertex Caching of Progressive Meshes

We present methods to generate rendering sequences for triangle meshes which preserve mesh locality as much as possible. This is useful for maximizing vertex reuse when rendering the mesh using a FIFO vertex buffer, such as those available in modern 3D graphics hardware. The sequences are universal in the sense that they perform well for all sizes of vertex buffers, and generalize to progressive meshes. This has been verified experimentally.     

A case study: California utilities and the progressive business model

Concentration on the new technological and funding requirements for decarbonizing utilities has obfuscated the reality that there is a new utility business model. The Progressive Business Model is legislation and regulatory actions taken to address climate change. Lacking a feedback loop for policy correction, it has raised utility rates, coopted utility management’s operational and investment independence, and sacrificed ratepayer safety and reliability.     

高精度多工位空调翅片硬质合金级进模的设计

从设计、制造和使用方面介绍了湖南钻石硬质合金工具有限公司研制的高精度多工位空调翅片硬质合金级进模。此级进模采用硬质合金作凸凹模材料，综合了拉伸、切口、压形、冲孔、翻边、切边开条、异型切、虚线切、切断等功能，集机械、电子、气液动、数控于一体，属大型、高精度、高效率、高寿命多工位级进模。     

小型轴类零件切断、冷镦、自动送料连续模

介绍了用在通用压力机上成形小型轴类零件的一种新型切断、冷镦自动送料连续模的结构形式、工作原理和设计要点。并给出了实用的模具结构。     

面向对象技术在智能级进模工步排样系统中的应用研究

阐明了面向对象技术应用的背景：即智能级进模工步排样系统的设计开发，并陈述了采用面向对象技术的原由，通过采用面向对象分析方法，进行系统分析，构建了智能级进模工步排样系统的OOA模型，并给出了系统关键类的面向对象描述及原型系统的实现。     

级进模结构CAD中组件设计方法的研究

如何快速设计标准件和典型结构（组件）是提高级进模结构设计效率的关键之一，因此本文提出一基于3D装配模型的组件设计方法，并为此为基础，在UGⅡ上开发出相应的3D级进模CAD系统。     

SolidWorks软件在级进模标准件库建立中的应用

级进模设计中存在大量的标准件，因而级进模CAD系统开发过程中有必要建立具备良好实用性的标准件库。本文介绍了以SolidWorks 2001为开发平台，以VB6．0为编程语言创建级进模CAD系统标准件库的过程。     

接触片多工位精密级进模设计

分析了接触片零件的结构工艺特点和加工工艺，介绍了零件的排样、模具的结构、模具工作过程，模具主要零件的设计制造要点。     

7A04高强铝合金复合强韧化工艺

采用复合强韧化工艺，对7A04铝合金的组织和性能进行了研究。结果表明，通过熔体净化、晶粒细化、强化均匀化、锻造及分级固溶处理能明显改善和提高7A04高强铝合金的综合性能，而且可以大大减少均匀化处理的保温时间。