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Search Results: 1 - 10 of 70829 matches for " 章继峰 "
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基于健康监测的层合板结构载荷重构
,张博明
力学与实践 , 2007, DOI: 10.6052/1000-0992-2006-358
Abstract: 探讨了载荷重构技术在智能化复合材料结构健康监测中的应用,着重针对一个自感知复合材料层合板的载荷重构进行了研究.首先,基于弹性波动理论和层合板理论,建立了低速冲击载荷作用下正交铺层层合板的前向波动模型的状态空间表达式;通过构造误差指标$J$,应用优化求逆重构了载荷时程和载荷的作用点,并应用算例对以上方法进行了验证.
接头局部增强的复合材料层合板螺栓连接试验与数值模拟
,谢永刚,张璐
复合材料学报 , 2013,
Abstract: 采用真空辅助成型工艺(VARI)制备了四种局部增强的复合材料层合板螺栓连接试件,通过试验及数值模拟对其力学性能进行了研究。数值研究中将复合材料层合板连接件的拉伸作为一个准静态问题,运用ABAQUS的显示分析算法及所编写用户材料子程序VUMAT对连接件进行了三维渐进失效模拟,同时在有限元模型中采用内聚力单元模拟了层合板与所设增强层的界面分层失效。数值计算结果与试验结果取得了较好的一致,验证了本文中数值方法的有效性。研究结果表明,不同的局部增强方案对复合材料螺栓连接性能的影响较大,设置[0/90/0/90]S铺层的内置纤维增强层能显著提高层合板的螺栓连接性能。
玻璃纤维-碳纤维混杂增强PCBT复合材料层合板的制备及低速冲击性能
Preparation and low-velocity impact properties of glass fiber-carbon fiber hybrid reinforced PCBT composite laminate

杨斌,,周利民
- , 2015, DOI: 10.13801/j.cnki.fhclxb.201502.004
Abstract: 采用环状对苯二甲酸丁二醇酯(CBT)预浸料, 利用真空袋辅助热压工艺制备了玻璃纤维机织布-碳纤维机织布/聚环状对苯二甲酸丁二醇酯(GF-CF/PCBT)混杂复合材料层合板。利用双悬臂梁(DCB)和三点端部开口弯曲(3ENF)试验对连续纤维增强PCBT复合材料层合板的层间强度做出评估。同时, 利用低速冲击试验结合Abaqus/Explicit有限元仿真重点考察了混杂纤维增强PCBT复合材料层合板的低速冲击性能。试验结果表明: 尽管CF/PCBT复合材料层合板具有优异的层间性能, 当冲击能量为114.3 J时, 由于CF自身的脆性, CF/PCBT复合材料层合板被完全穿透, 而GF-CF/PCBT混杂复合材料层合板只在表面形成凹痕。与纯CF增强PCBT复合材料层合板相比, 铺层形式为[CF/GF/CF]25的GF-CF/PCBT混杂复合材料层合板的抗冲击损伤能力提高2倍。仿真得到的云图显示, 冲击引起的应力在CF中的分布区域要明显大于在GF中的分布区域。 The glass fiber woven fabric-carbon fiber woven fabric/poly(cyclic butylene terephthalate) (GF-CF/PCBT) interlaminated hybrid composite laminates were prepared by vacuum bag assisted hot-press processing from the cyclic butylene terephthalate (CBT) prepregs. Double cantilever beam (DCB) and three-point end notched flexure (3ENF) tests were adopted to estimate the interlaminar performance of the obtained continuous fiber reinforced PCBT composite laminates. Meanwhile, the response of hybrid fiber reinforced PCBT laminates under low-velocity impact was mainly investigated by the tests and Abaqus/Explicit finite element simulation, respectively. The test results show that, despite the excellent interlaminate performance of CF/PCBT composite laminates, CF/PCBT composite laminates are penetrated under the impact energy of 114.3 J due to the brittleness of CF. As a comparison, the GF-CF/PCBT interlaminated hybrid laminates form merely dent on surface. Compared with pure CF reinforced PCBT composite laminates, the impact strength of GF-CF/PCBT interlaminated hybrid laminates with the layer form [CF/GF/CF]25 enhances significantly by 2 times. Simulation results show that stress area in CF is larger than that in GF in the resulted stress nephogram. 港澳台科技合作专项 (2014DFH50060)
平板型复合材料格栅结构的增强改进与参数设计
,张博明,杜善义
复合材料学报 , 2006,
Abstract:  在拉挤-互锁平板型复合材料格栅结构的制作演示基础上,提出了几种增强改进的方法,并实现了一种平板型复合材料格栅结构的制造。借助有限元模型,考虑到结构的力学性能和制作工艺,对结构的最优化几何参数进行了研究,建立了加帽增强平板型格栅结构几何参数的初步设计方法。
复合材料燃料贮箱渐进损伤分析与剩余强度预报
,王振清,张博明
力学与实践 , 2009, DOI: 10.6052/1000-0992-2008-080
Abstract: 基于复合材料渐进失效准则和刚度降阶模型,建立了复合材料燃料贮箱性能演化的表征模型和分析模型,借助有限元软件ABAQUS对内压作用下复合材料贮箱结构的渐进损伤过程进行了分析,实现了复合材料贮箱结构剩余强度的预报,通过与文献数据的比较,验证了该分析方法的有效性.
复合材料燃料贮箱渐进损伤分析与剩余强度预报
,王振清,张博明
力学与实践 , 2009, DOI: 10.6052/1000-0992-lxysj2008-080
Abstract: 基于复合材料渐进失效准则和刚度降阶模型,建立了复合材料燃料贮箱性能演化的表征模型和分析模型,借助有限元软件ABAQUS对内压作用下复合材料贮箱结构的渐进损伤过程进行了分析,实现了复合材料贮箱结构剩余强度的预报,通过与文献数据的比较,验证了该分析方法的有效性.
玻纤铝合金层板受低速冲击损伤实验和仿真
万云,,王振清,周利民
哈尔滨工程大学学报 , 2015, DOI: 10.3969/j.issn.1006-7043.201404019
Abstract: 为了研究GLARE板受冲击载荷下破坏机理。落锤实验分析了GLARE板抗低速冲击性能, 给出了其在实验中的破坏响应。实验分析了该材料的时间接触力曲线、时间变形曲线、时间能量吸收曲线、以及变形接触力曲线变化过程和试件两面的铝合金层的破坏情况。在ABAQUS软件中, 建立了落锤低速冲击的有限元模型。通过对比在不同冲击能量时实验和数值模拟的时间接触力曲线、时间变形曲线、时间能量吸收曲线和铝合金层的破坏, 验证了有限元模型的可靠性。在分析对比不同冲击时复合材料和铝合金破坏之后, 发现复合材料层的破坏程度变化并不大, 相反铝合金层的破坏程度有较大变化, 所以铝合金层在材料整体抗冲击性能起重要作用。
GF/PCBT复合材料熔融连接接头失效分析的实验研究与数值模拟
Experiment research and numerical simulation on failure analysis of GF/PCBT composite fusion joints

张璐,,王振清,周利民
- , 2015, DOI: 10.13801/j.cnki.fhclxb.20141107.001
Abstract: 为了解决高黏度热塑性树脂难以制备高强度、大尺寸纤维增强热塑性复合材料构件的问题, 采用真空辅助树脂传递模塑(VARTM)工艺与热压工艺相结合的方法, 以环状对苯二甲酸丁二醇酯(CBT)在催化剂作用下聚合成的聚环状对苯二甲酸丁二醇酯(PCBT)为基体, 制备了纤维体积分数达70%的连续玻璃纤维(GF)/PCBT复合材料层合板及熔融连接件, 并测得其力学参数。采用数值模拟方法对连接界面层数分别为1、2、3层的A、B、C型3种不同方案的GF/PCBT复合材料熔融连接接头的承载能力和失效模式进行了预测。结果表明:不同的结构设计方案对GF/PCBT复合材料接头性能的影响较大, 当连接长度在一定范围内时, 接头区域主要发生界面分层失效, 接头处复合材料的翘曲为界面裂纹加速扩展的主要因素, C型连接方式的接头结构承载能力相比于A型连接方式有明显提高;增加C型接头连接长度, 试件承载能力提高, 直至接头处界面分层失效和纤维、基体失效同时发生;继续增加连接长度, 纤维与基体失效将成为接头区域的主要失效模式, 此时承载能力无明显提升。 Aiming to solve the difficult manufacture of high strength and large size fiber reinforced thermoplastic composite components using high viscosity thermoplastic resins, combined vacuum assisted resin transfer molding(VARTM) technology with hot-pressing technology, continuous glass fiber (GF) reinforced poly (cyclic butylene terephthalate)(PCBT) composite laminates and fusion joints with 70% fiber volume fraction were prepared with PCBT as matrix via polymerization of cyclic butylene terephthalate (CBT) under the action of catalyst. And the mechanical parameters were measured. The carrying capacity and failure mode of three different schemes of GF/PCBT composite fusion joints with 1, 2, 3 layers of connection interfaces (A, B, C type) were predicted by numerical simulation method. The results show that different structure design schemes have a great impact on properties of GF/PCBT composite joints. When connection length is within a certain range, the interface delamination failure is the main failure mode of bonding region and the warping of composites in joint area is the main factor accelerating the expansion of interface crack. Compared with joint A, the structure carrying capacity of joint C is obviously improved and it has been increased with the increase of the connection length of joint C until the interface delamination at joint, fiber and matrix failure occur at the same time. Continue to increase the connection length, the fiber and matrix failure will become the main failure mode of bonding region and the carrying capacity has no obvious improvement. 港澳台科技合作专项(2014DFH50060);国家自然科学基金(51379045)
玻璃纤维表面纳米SiO2改性对GF/PCBT复合材料力学性能的影响
Effects of glass fiber surface modified by nano-SiO2 on mechanical properties of GF/PCBT composites

杨斌,,梁文彦,周利民
- , 2015, DOI: 10.13801/j.cnki.fhclxb.20140611.002
Abstract: 为研究玻璃纤维(GF)表面纳米SiO2改性对GF增强树脂基复合材料力学性能的影响, 利用真空辅助模压(VAMP)工艺制备了不同含量的纳米SiO2表面改性GF增强聚环状对苯二甲酸丁二醇酯(PCBT)复合材料。分析了GF表面改性对GF/PCBT复合材料力学性能的影响, 研究了纤维表面改性对GF/PCBT复合材料抗湿热老化性能的影响规律。纤维拔出试验结果表明: 经表面处理的GF/PCBT复合材料的界面剪切强度提高了1.16倍; 采用含量为0.5wt%和2wt%(与树脂质量比)的纳米SiO2处理GF表面后, 复合材料的三点弯曲强度分别提高1.5倍和1.67倍, 弯曲模量分别提高1.03倍和1.17倍。SEM结果显示: 当纳米SiO2用量为2wt%时, 破坏后的纤维表面被树脂完全覆盖, 树脂与纤维粘结良好。在湿热条件下, 由于纳米SiO2颗粒的存在, 水分子很难通过界面相扩散到改性后的材料内部, 其抗湿热性能提高。 To study the effect of glass fiber (GF) surface modified by nano-SiO2 on mechanical properties of GF reinforced matrix composites, vacuum-assisted mold pressing (VAMP) technology was adopted to prepare polymerized poly(cyclic butylene terephthalate)(PCBT)-based composites reinforced by GF modified by various nano-SiO2 on the surface. The effect of GF surface modification on mechanical properties of the obtained GF/PCBT composites was investigated and the hygrothermal aging resistance of GF/PCBT composites with modified GF was further studied. The fiber pull-out test results show that the interface shear strength of GF/PCBT composites enhances by 1.16 times after nano modification on fiber surface. With nano-SiO2 content of 0.5wt%, 2wt% (mass ratio of nano-SiO2 to PCBT), the three-point flexural strength of GF/PCBT composites increases by 1.5 times and 1.67 times, flexural modulus increases by 1.03 times and 1.17 times, respectively. Observations by SEM show that the damaged fibers are covered tightly by PCBT resin when nano-SiO2 content is 2wt%, which is an indication of good bonding properties between the matrix and fibers. Under hygrothermal conditions, hydrone diffusion along the interphase region is hindered and results in the enhancement of the anti-aging performance of the modified GF/PCBT composites, due to the existence of nano-SiO2 particles. 港澳台科技合作专项(2014DFH50060)
PROGRESSIVE FAILURE ANALYSIS AND RESIDUAL LIFE PREDICTION FOR FUEL TANK
复合材料燃料贮箱渐进损伤分析与剩余强度预报

ZHANG Jifeng,WANG Zhenqing,ZHANG Boming,
,王振清,张博明

力学与实践 , 2009,
Abstract: The progressive failure analysis and residual life prediction of composite fuel tank are an important part of safety evaluations of RLV. In this paper, based on classical laminates theory, analytic and token models of composite fuel tank are built. By the finite element software ABAQUS, the progressive failure analysis is carried out and the residual life of a fuel tank is predicted. Compared with literature data, good agreements are obtained, which validates the methods proposed in the paper.
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