一种环氧玻璃钢压力容器

本文记述了工作压力为200公斤/厘米~2、爆破压力大于1000公斤/厘米~2的玻璃钢压力容器的研制过程,包括原材料选择及性能、容器缠绕规律选择、强度设计、容器性能试验等。讨论了容器中纤维强度的发挥及容器的疲劳问题。该种玻璃钢容器已通过部级技术鉴定。     

型钢泡沫混凝土界面粘结滑移性能的试验研究

本文主要研究C型冷弯薄壁型开孔的钢泡沫混凝土界面滑移性能。根据33个型钢泡沫混凝土推出试件和4个对比试件的推出试验,得到型钢泡沫混凝土的荷载-滑移特征曲线,以及其破坏形态,探讨了不同开孔直径、间距、位置对界面滑移性能的影响。     

现场缠绕玻璃钢大型容器轴向力学性能设计指标的探讨

耐化学腐蚀现场缠绕玻璃钢大型容器行业标准(HG/T3983-2007)第4章4.8.7条中规定容器罐体轴向力学性能以“轴向拉伸强度(MPa)”为指标.此指标通常用于衡量传统的“各向同性”的均质材料,而玻璃钢属于“各向异性”的非均质材料.本文旨在从缠绕玻璃钢的性能特点、“现场缠绕玻璃钢大型容器”产品结构特点、生产工艺、使用状况、试验方法等五方面进行现场缠绕玻璃钢大型容器轴向力学性能指标的探讨,阐述用“单位线强度(kN/m)”作为容器罐体轴向力学性能的指标更为科学.     

大口径钢和玻璃钢复合管的弯曲变形分析

钢和玻璃钢复合管,充分利用钢的刚性和玻璃钢的耐腐蚀性能,在大口径管中得到广泛应用,在一些工程中,管要经弯曲施工,因此必须进行弯曲变形分析,确保管子在使用中,玻璃钢不开裂,达到防腐蚀的目的。     

混杂纤维增韧水泥基复合材料的静动态弯拉性能

为了掌握钢纤维-聚乙烯纤维(PE纤维)混杂对水泥基材料静动态弯拉性能的影响规律,通过三点弯拉试验和落锤冲击试验方法,研究了钢-PE纤维混杂(掺量保持体积分数2.0%不变)增韧水泥基复合材料(HFTCC)的静动态弯拉性能,分析了钢纤维与PE纤维的混杂效应以及相应的增韧机理。结果表明：HFTCC静态弯拉性能与钢-PE纤维中PE纤维掺量正相关,而动态弯拉性能与钢纤维掺量表现出较强的正相关。1.5%(体积分数) PE纤维与0.5%钢纤维混杂表现出最佳的静态弯拉峰值应力;1.5%钢纤维0.5%PE纤维表现出最佳的动态弯拉能量吸收。在静态弯拉下,钢-PE混杂纤维相较于2.0%钢纤维对HFTCC峰值强度及能量吸收提升幅度分别为26.5%～31.7%与14.8%～56.8%;HFTCC的动态强度增长因子(DIF)与能量吸收表现出明显的应变率效应。钢纤维和PE纤维适当混杂可对HFTCC发挥较好的协同增强增韧效应,从而有效提升HFTCC的静动态弯拉性能。     

第三届玻璃钢年会学术报告和资料题录

1.数理统计方法在玻璃钢模压制品生产中 的应用2.复合材料界面研究3.复合材料界面及研究方法4.玻璃钢界面5.封头测地线缠绕时丝咀和纤维的运动方 程6.非线性缠绕的运动分析7.玻璃钢内压容器金属接咀的强度设计8。纤维缠绕玻璃钢圆锥体的等角等厚计算9.轨道式缠绕机实现螺旋缠绕的线型分析 和计算10.纤维复合材料弹性常数和强度计算11。玻璃钢地面雷达罩电气设计12.四种胶粘剂的实验报告13。低性能增强材料探讨14.新型片状模塑料15。国外SMC新发展16.国外合成材料新品种17.自熄性环氧树脂应用小结18。耐热树脂—氨基环氧19.酚醛一环氧乙烯…     

上海玻璃钢研究院有限公司测试中心/中国上海测试中心玻璃钢/复合材料行业测试点

<正>上海玻璃钢研究院有限公司测试中心,隶属于上海玻璃钢研究院有限公司,承担着本院产品研发所涉及的材料性能测试、新材料性能研究、玻璃钢测试国家标准制定等工作。中国上海测试中心玻璃钢/复合材料行业测试点,是上海市科委设立的玻璃钢/复合材料行业服务机构,挂靠于上海玻璃钢研究院有限公司,对国内外玻璃钢/复合材料及其原材料厂家和研究机构提供性能测试与研究、设计咨询、玻璃钢产品结构试验等服务,并对外开展研究合作项目。服务项目如下:     

玻璃钢在水浸条件下的拉伸强度分析

玻璃钢在水浸条件下的性能变化是璃玻钢的性能之一。我所自1960年以来。不仅积累了一批璃玻钢样板试验资料,而且还积累了实际应用璃玻钢艇体的二十年取样试验资料。本文根据我们的工作对璃玻钢在潮湿或水浸条件下的拉伸强度作一分析探讨。 一、玻璃钢在水中力学 性能变化的一般规律     

玻璃钢/钢连接界面复合结构拉伸破坏机理试验研究

对玻璃钢/钢结构连接界面粘结强度进行研究,采用不同种类及比例的添加剂对粘结剂-环氧树脂进行改性,并用不同的工艺制作了系列粘结结构试件.根据试验结果,得到了不同试件的拉伸破坏强度和三种典型破坏模式,并对破坏机理进行了分析.     

玻璃钢复合材料在海洋环境下的抗冻耐久性能研究

采用1 000次冻融循环试验研究了189不饱和聚酯玻璃钢和MFE–2,MFE–711,MFE–W1环氧乙烯基酯玻璃钢在海水中的抗冻耐久性能。结果表明,1 000次冻融循环试验后,189不饱和聚酯玻璃钢和MFE–711环氧乙烯基酯玻璃钢的树脂基体在冻融循环产生的应力作用下发生开裂破坏,弯曲强度保留率降低至30%左右,渗入189不饱和聚酯玻璃钢和MFE–711环氧乙烯基酯玻璃钢包覆的混凝土试样表层的氯离子质量分数分别为0.08%和0.12%;MFE–2和MFE–W1环氧乙烯基酯玻璃钢在750次冻融循环后,弯曲强度保留率降至最低值65%,且不再随冻融循环次数增加而降低,1 000次冻融循环后,在MFE–2和MFE–W1环氧乙烯基酯玻璃钢包覆的混凝土试样表层未检测到氯离子渗入,它们的树脂基体在冻融循环产生的应力作用下未发生开裂破坏,具有较好的抗冻耐久性能。玻璃钢复合材料的冻融破坏是缓慢累积的过程,至少需要1 000次的冻融循环试验才能区分其抗冻耐久性能的优劣。     

钢板-GFRP组合桥面板受弯性能试验与理论分析

基于玻璃纤维增强复合材料(Glass Fiber Reinforced Polymer,简称"GFRP")具有轻质高强、耐腐蚀等优点,提出一种新型组合桥面板,即在钢板表面粘贴GFRP板,作为正交异性钢桥面板的防水和防腐蚀层,兼有增强钢板刚度的作用。在对组成材料材性测试的基础上,对组合桥面板试件在正弯矩和负弯矩作用下进行四点弯曲试验,测出各试件的荷载-位移曲线、荷载-应变曲线;通过换算截面理论推导出钢板-GFRP组合桥面板的刚度、跨中挠度和应力计算公式,并与试验值对比;在四种铺装模型下运用有限元软件分别对正交异性钢板进位移和应力分析。研究结果表明:钢板表面粘贴GFRP板可以有效提高钢板的屈服承载能力和刚度,降低钢板表面应力和开裂风险;钢板-GFRP组合桥面板弯曲性能的理论计算值与试验值吻合性较好。     

玻璃纤维增强复合材料筋材连接试验研究

本文通过实验研究了由两种不同的粘结材料对玻璃纤维增强复合材料(GFRP)筋材的连接特性。研究表明采用环氧类树脂粘结剂进行钢套管和GFRP筋的连接,技术可行;环氧类树脂粘结剂的粘结滑移关系曲线上升段具有双折线特性。依据粘结滑移关系曲线,建议粘结强度设计值以屈服强度或控制变形量为确定标准,本试验建议取粘结极限强度的50%。提出了选择粘结剂的指标和温度影响、各种环境介质对其粘结性能劣化的影响试验要求。     

Damage characterization of repeatedly impacted glass fiber reinforced polyester‐armor steel composites with cone beam computed tomography technique

This article utilizes the characterization of single and repeated low velocity impact damage behavior of glass fiber reinforced polyester (GFRP) armor steel composite. Cone beam computed tomography technique (CBCT) was used for damage assessment. Impact energies, maximum loads and the permanent deflection of GFRP, armor steel composites are determined with instrumented drop weight impact test machine. The repeated impact performance and damage resistance were evaluated. On the other hand, preliminary single impact loading tests also performed in order to find the energy levels, which were ranged fully elastic energy level to perforation energy level for GFRP, armor steel composites. Additionally, CBCT was used to provide a novel, multiscale approach for assessing impact damage. Deformation areas of both single and repeatedly impacted GFRP, armor steel composites were assessed three‐dimensionally by CBCT. An innovative approach was used to visualize the internal damages. POLYM. COMPOS., 37:583–593, 2016. © 2014 Society of Plastics Engineers     

Ageing of corrosion resistant steel/rubber/composite hybrid structures

One of the major challenges when preparing reliable hybrid structures is the adhesion between different components. Besides enduring the specific stress state, hybrid structures should maintain the required properties in the service environment without degradation. In this study, the environmental resistance of stainless steel/rubber/GFRP (glass fibre reinforced plastic) hybrid structures were tested by exposure to hot, moist and hot/moist environments and after the ageing by peel testing. Two different stainless steel surface finishes and two different rubber grades were investigated. The results were compared with the properties of a mild steel/rubber/GFRP structure. Both mild steel/rubber and composite/rubber structures are used in industrial applications, such as in vibration damping devices and in automotive components.The peel tests showed that with right rubber compounds, stainless steel/rubber and GFRP/rubber interfaces can maintain their properties even in harsh hot/moist environments to such an extent that the interfacial strength of the joint is higher than the cohesive strength of the rubber. This enables the use of rubber's cohesive fracture properties instead of the substrate/rubber interfacial properties when estimating the strength of the steel/rubber/GFRP hybrid structure. In addition, based on the current study, time-consuming stainless steel pre-treatments are not needed but the stainless steel can be in the as-received stage. According to the chemical analysis even before and after the harsh hot/moist exposure used, none of the studied rubber grades had degraded. Thus, we conclude that it is possible to manufacture environmental resistant stainless steel/GFRP hybrid structures with the aid of EPDM rubbers.     

湿热环境下泡桐木复合材料夹芯结构Ⅰ型界面剥离试验研究

采用人工加速老化的方法模拟湿热环境,通过泡桐木玻璃纤维增强复合材料夹芯结构的双悬臂梁拉伸剥离试验,研究湿热环境对玻璃纤维增强复合材料(GFRP)面板和泡桐木芯材的粘结性能的影响。试验结果表明,90 d湿热加速老化后泡桐木复合材料夹芯结构的能量释放率下降了32.3%,芯材泡桐木顺纹抗拉强度下降了11.6%,GFRP面板拉伸模量下降了11.0%。     

Assessment of recycling use of GFRP powder as replacement of fly ash in geopolymer paste and concrete at ambient and high temperatures

Environmental issues caused by glass fiber reinforced polymer (GFRP) waste have attracted much attention. The development of cost-effective recycling and reuse methods for GFRP composite wastes is therefore essential. In this study, the formulation of the GFRP waste powder replacement was set at 20–40 wt%. The geopolymer was formed by mixing GFRP powder, fly ash (FA), steel slag (SS) and ordinary Portland cement (OPC) with a sodium-based alkali activator. The effects of GFRP powder content, activator concentration, liquid to solid (L/S) ratio, and activator solution modulus on the physico-mechanical properties of geopolymer mixtures were identified. Based on the 28-day compressive strength, the optimal combination of the geopolymer mixture was determined to be 30 wt% GFRP powder content, an activator concentration of 85%, L/S of 0.65, and an activator solution modulus of 1.3. The ratios of compressive strength to flexural strength of the GFRP powder/FA-based geopolymers were considerably lower than those of the FA/steel slag-based geopolymers, which indicates that the incorporation of GFRP powder improved the geopolymer brittleness. The incorporation of 30% GFRP powder in geopolymer concrete to replace FA can enhance the compressive and flexural strengths of geopolymer concrete by 28%. After exposure to 600 °C, the flexural strength loss for geopolymer concretes containing 30 wt% GFRP powder was less than that of specimens without GFRP powder. After exposure to 900 °C, the compressive strength and flexural strength losses of geopolymer concretes containing 30 wt% GFRP powder were similar to those of specimens without GFRP powder. The developed GFRP powder/FA-based geopolymers exhibited comparable or superior physico-mechanical properties to those of the FA-based geopolymers, and thus offer a high application potential as building construction material.     

不同外形GFRP变形筋的粘结性能试验比较

GFRP变形筋的外形是影响GFRP筋与混凝土粘结性能的重要因素。本文利用拔出试验研究8种不同外形的GFRP变形筋与混凝土之间的粘结性能,比较了不同外形的GFRP变形筋的粘结强度。试验结果表明,GFRP变形筋的粘结强度较高,最佳肋间距不应超过直径的2.5倍,肋高度应不小于直径的3%。     

不同种类GFRP筋的力学性能试验比较

GFRP筋的高强、轻质、耐腐蚀、抗磁性使其具有了作为结构材料的优良性能,解决了钢筋混凝土中钢筋锈蚀的严重问题.本文对研制开发的6种不同的GFRP筋进行常温拉伸比较试验.结果表明,随树脂的不同与玻璃纤维含量的改变,不同GFRP筋的强度及弹性模量有较大的差异.     

考虑不同位置变化的GFRP筋与混凝土粘结试验研究

通过对GFRP筋混凝土试件进行内贴片单端拉拔试验,将试验数据进行总结和分析,绘制GFRP筋应变随荷载和不同位置变化的分布曲线,探讨曲线各自的特征;研究GFRP筋与混凝土之间的粘结应力及滑移随不同位置变化的分布情况。试验结果表明,由于GFRP筋材料本身特性的原因使得其与混凝土之间的粘结应力随位置的变化规律与钢筋混凝土有显著的不同;运用粘结长度范围内不同位置处的滑移拟合公式得到的随不同位置变化的滑移曲线计算值与试验值吻合良好。