对粘弹性材料力学性质的再认识

以[1]的线性理论为基础,分析粘弹性材料动态压缩试验的压力,变形及加卸卸载速率,据此绘制材料的应力应变曲线,证明粘弹性材料动态压缩试验的加载与卸载曲线不重合,指出卸载阶段约束时试件有不能立即恢复的粘弹性变形,并导出了与粘弹性回复曲线对应的指数衰减函数。     

冷变形对304不锈钢组织和性能影响的探讨

通过大量的试验，分析讨论了变形速率对σb和δ的影响；冷加工对304不锈钢奥氏体敏化态晶间腐蚀（IGC）的影响及控制；变形量和化学成分主要是（Cr/Ni）对304不锈钢磁性强度影响。根据试验得出，304不锈钢磁性强度随Cr/Ni值和变形量增加而增加，这是因为冷变形诱发马氏体的产生且有磁性；拉伸强度σb随拉伸速率的增加而减少，当速率＞40mm/min时，σb趋于稳定；304不锈钢经冷变形后T－T－S曲线的IGC发生区向低温和长时间敏化侧移动。     

新工质R404A应用研究的国际合作

新工质Ｒ４０４Ａ应用研究的国际合作法国泰康、百年公司与华东工大在国内率先开展全封闭压缩冷凝机组应用Ｒ４０４Ａ的试验研究法国泰康公司（Ｌ’ＵｎｉｔｅＨｅｒｍｅｔｉｑｕｅ）是一具有四十余年历史，国际驰名的全封闭制冷压缩机（组）的专业生产厂，隶属泰康集团。...     

加载速率对A12O3陶瓷弯曲切口强度及其概率分布的影响

测定了Ａ１２Ｏ３陶瓷在不同恒位移加载速率作用下的弯曲强度和弯曲切口强度。结果表明，不同切口的实际应力速率可由试验记录的载荷－时间曲线确定。在实验的四种加载速率下（０．０５，０．５，５和５０ｍｍ／ｍｉｎ），其弯曲强度、弯曲切口强度均同时符合正态分布、对数正态分布和Ｗｅｉｂｕｌｌ分布，加载速率在０．０５～５ｍｍ／ｍｉｎ，其弯曲强度、弯曲切口强度符合本文给出的陶瓷材料切口强度的表达工，从而实现了用光滑试     

聚醚型聚氨酯／乙烯基酯树脂互穿聚合物网络结构？…

以聚氨酯（ＰＵ）为组分Ｉ,乙烯工酯树脂（ＶＥＲ）为组分Ⅱ,采用二步法制备了聚氨酯／乙烯基酯树脂互穿聚合物网络（ＰＵ／ＶＥＲ－ＩＰＮ）采用透射电镜（ＴＥＭ）和原子显微镜观察了ＰＵ／ＶＥＲ－ＩＰＮ的微观形态,用调制ＤＳＣ（Ｍ－ＤＳＣ＾ＴＭ）动态力学分析方法（ＤＭＡ）研究了ＩＰＮ的玻璃化转变行为及动态力学性能,结果表明,ＰＵ网络与ＶＥＲ网络形成了多相微区结构,在界面处互穿和缠结,形成类似胞状的结构,ＰＵ     

文摘

文摘二元系统火工品的燃烧试验（英文）Ｃ９４２８２９６５ＲＵＧＵＮＡＮＡＮＲＡ，ＢＲＯＷＮＭＥ（ＲｈｏｄｅｓＵｎｉｖｅｒｓｉｔｙＧｒａｈａｍｓｔｏｗｎ，ＺＡＰ）：Ｈ０５１０Ｂ，ＣｏｍｂｕｓｔＳｃｉｅｎｃｅＴｅｃｈｎｏｌｏｇｙ（ＧＢＲ）９５（ｌ／６）１１...     

有指定行和向量与列和向量的(0,1,…,r)-矩阵

设Ｕｒ（Ｒ，Ｓ）是所有具有指定行和向量Ｒ与列和向量Ｓ的（０，１，…，ｒ）－矩阵组成的集合，给出了Ｕｒ（Ｒ，Ｓ）的结构矩阵的一些性质，以及Ｕｒ（Ｒ，Ｓ）非空时向量Ｒ与Ｓ之间的关系。     

手动加载系统中加载速率的控制

手控加载系统广泛用于普通试验机（如液压万能试验机）和自行组建的力学试验系统。它的致命缺点是无法控制加载速率，而许多试验标准都要求按规定的速率加载，本文给出了两种可对加载速率进行控制的方法，实验室可根据具备的条件选择使用，该方法经济实用，能满足工程试验要求，解决了落后的试验设备短期内不能适应先进技术标准的局面。     

氯羟丙基磷酸酯对软质聚氨酯泡沫阻燃机理的研究

采用含活性氢的氯羟丙基磷酸酯（ＣＨＰＡ）参与ＰＵ发泡配方中的异氰酸酯反应，使生成的软质聚氨酯泡沫（软ＰＵＦ）分子含阻燃元素Ｃｌ、Ｐ而实现其阻燃化。研究结果表明，含１２ｐｈｒＣＨＰＡ的软质ＰＵＦ的阻燃性能可达ＧＢ１０８００－８９／Ｉ级。着重研究了ＣＨＰＡ对软质ＰＵＦ的阻燃机理，提出燃烧初期ＰＵＦ／ＣＨＰＡ中的Ｃ－Ｃｌ键断裂，释放出ＨＣｌ与磷酸酯作用，生成ＰＯＣｌ３、ＰＣｌ３、ＰＣｌ５等不燃性化合物。     

阻燃剂PUR—101在软质聚氨酯泡沫之功效

本文探讨与分析了软质聚氨酯泡沫趋势，特性及阻燃剂现状，趋势，介绍了一种软质聚氨酯泡沫的理想阻燃剂ＰＵＲ－１０１及其在汽车工业，复合面料和其它行业上的应用。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to