查询词典 plastic material

The research results show as follows. As plastic deformation increases, the Young's modulus of material continuously changes. This variation law is able to be described using a piecewise linear function .Hardening model and whether the variation is considered or not make great effet on springback prediction. It is proved that the springback prediction result which adopts the elastic-plastic constitutive model based on INLK hardening model and the variation of Young's modulus is considered, is more close to experimental result. After the sheet metal undergoes multiple bending, the corner radius and bending height also affect springback greatly.But the effect trend is different. At the same time, the reliability of springback research using numerical simulation is proved.

研究结果表明：材料弹性模量随塑性变形的变化是不断变化的，该变化规律可用分段线性函数进行描述；强化模型及考虑弹性模量变化与否对回弹预测有很大的影响，基于INLK强化模型和考虑弹性模量变化的弹塑性本构模型对回弹的预测结果与试验最接近；多次弯曲中圆角半径与弯曲高度对板料变形后的回弹有较大影响，但影响趋势不同；证明了数值模拟方法对回弹研究的可靠性。

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。

Unripe resolvability is plastic become by the place of natural raw material of 100 ％, have particular strength at the same time, what in replacing the product such as TV computer likely, use now plastic article.

生分解性塑料由100％的天然原料所成，同时具有一定的强度，有可能替代电视电脑等产品中所使用的现塑料品。

At present, due to the shortage of un-regenerated resource as petroleum and the requirements of agricultural development, BBCA Group takes the advantage of own bio-technology to stress development of bio-material such as corn, cassava, sorgo, stalk etc to produce fuel alcohol, bio-ethene and its ramification, fibre-polyester, degradable plastic, nontoxic plastic and paint solvent ect, and most of products mentioned above can replace petroleum chemical products.

目前，由于石油等不可再生资源紧缺和农业发展的需要，丰原利用自身生物技术的优势，重点发展以各种生物质（玉米、木薯、红薯、甜高梁、作物秸杆等）为原料生产燃料酒精、生物乙烯及其衍生物、纺织品原料纤维聚酯、聚乳酸生物可降解塑料、无毒增塑剂、油漆涂料的无毒溶剂等系列产品，上述产品可大部分替代石油化工产品。

At present,due to the shortage of un-regenerated resource as petroleum and the requirements of agricultural development,BBCA Group takes the advantage of own bio-technology to stress development of bio-material such as corn,cassava,sorgo,stalk etcto produce fuel alcohol,bio-ethene and its ramification,fibre-polyester,degradable plastic,nontoxic plastic and paint solvent ect,and most of products mentioned above can replace petroleum chemical products.

十年产业发展，丰原集团农产品深加工能力已达360万吨/年，加工产品主要应用于食品添加剂、饲料添加剂、洗涤剂、精细化工、医药原料等产业目前，由于石油等不可再生资源紧缺和农业发展的需要，丰原利用自身生物技术的优势，重点发展以各种生物质(玉米、木薯、红薯、甜高梁、作物秸杆等)为原料生产燃料酒精、生物乙烯及其衍生物、纺织品原料纤维聚酯、聚乳酸生物可降解塑料、无毒增塑剂、油漆涂料的无毒溶剂等系列产品，上述产品可大部分替代石油化工产品

It is reported that the main material in plastic bottles in general are PET, the use of waste plastic bottles made of staple fiber raw materials required to go through a complex physical process.

据报道，在一般的塑料瓶的主要原料是聚酯，是利用废旧塑料瓶制成短纤需要经过复杂的物理过程的原材料。

To now, the umbrella canopy from the old development Zhisan, cloth umbrellas, nylon umbrella, plastic umbrella, automatic umbrellas and many other varieties, used as a bone umbrella stand umbrella of material from the earliest bamboo, wood development as steel, aluminum, plastic, resin fiber, acrylic, etc..

到现在，雨伞已由古老的伞盖发展为纸伞、布雨伞、尼龙雨伞、塑料雨伞、自动雨伞等许多品种，用作伞骨伞架的材料也从最早的竹、木发展为钢、铝、塑料、树脂纤维、有机玻璃等等。

According to today's elastic-plastic theory, cross-flow rule or prandtl-Reuss theory is generally used to determine the direction of increment of plastic strain when the material entered yeild phrase.

当前土体弹塑性理论在如何确定材料屈服后塑性应变增量方向的方法一般采用正交流动法则和Prandtl—Reuss理论。

There are many merits of autofrettage of the composite material barrel with metal inner. One of them is that it can increase the elastic-plastic strength limits and possesses higher anti-plastic failure properties than pure metal barrels.

对带金属内衬的复合材料身管，自紧有许多优点，一方面可以提高身管的弹塑性强度极限，且经处理后的复合材料身管比纯金属身管具有更高的抗塑性破坏能力。

In the present thesis, the solution of axisymmetrical space full plastic problems of ideal elastoplastic material is proposed from the fundamental equations, the possibility of using Tresca's yielding condition and the influence of longitudinal stress are discussed therefore the analytic formulae of plastic strain are also derived.

本文从轴对称空间问题的基本方程出发，研究了理想弹塑性材料塑性加载时的一般解法，讨论了采用各种形式Tresca屈服条件的可能性及轴向应力对于它的影响，并导出了塑性应变的解析式。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐