本文選題：三維機(jī)織結(jié)構(gòu) + T字型三維整體機(jī)織復(fù)合材料��； 參考：《大連工業(yè)大學(xué)》2015年碩士論文

【摘要】：T型梁作為一種常見(jiàn)的工程結(jié)構(gòu)件,被廣泛應(yīng)用在航空航天航海以及建筑等領(lǐng)域。由于不可定因素的存在,可能會(huì)遭遇鳥(niǎo)擊、雨雪或冰雹和船只撞擊等造成的一些外部損害。作為復(fù)合材料增強(qiáng)體的三維機(jī)織結(jié)構(gòu)同三維針織結(jié)構(gòu)和三維編織結(jié)構(gòu)相比,具有特殊的結(jié)構(gòu)特點(diǎn)和優(yōu)異的力學(xué)性能,因而設(shè)計(jì)并制造高彎曲強(qiáng)度和抗沖擊性能的T字型三維整體機(jī)織復(fù)合材料,應(yīng)用前景十分可觀。本課題將玻璃長(zhǎng)絲束作為經(jīng)紗,玄武巖長(zhǎng)絲束作為緯紗在普通小樣織機(jī)上低成本織造成三種不同梁高的T字型三維整體機(jī)織物,并采用VARTM(Vacuum Assistant Resin Transfer Moulding)成型工藝制備成復(fù)合材料。利用電子萬(wàn)能試驗(yàn)機(jī)測(cè)試了三種不同梁高的T字型三維整體機(jī)織復(fù)合材料在準(zhǔn)靜態(tài)下的三點(diǎn)彎曲性能,研究T字型三維整體機(jī)織復(fù)合材料的破壞模式和能量吸收方式等。從實(shí)驗(yàn)所得的載荷-位移曲線和吸收能量-位移曲線關(guān)系圖來(lái)看,隨著位移的增加,梁高為12 mm的T字型三維整體機(jī)織復(fù)合材料所能承載的載荷和吸收的能量最大,梁高為0mm的T字型三維整體機(jī)織復(fù)合材料最小。從材料最終破壞形態(tài)來(lái)看,梁高為0 mm的材料表現(xiàn)為典型的彎曲破壞模式,正面受壓縮破壞,背面受拉伸破壞,梁高為6 mm和12 mm的材料正面表現(xiàn)為壓縮破壞,背面為剪切破壞�？梢�(jiàn)基體開(kāi)裂、纖維與樹(shù)脂脫粘和纖維斷裂等破壞是材料彎曲破壞模式中主要的吸收能量方式。在簡(jiǎn)支梁沖擊實(shí)驗(yàn)中,T字型三維整體機(jī)織復(fù)合材料受到的沖擊過(guò)程幾乎是一瞬間發(fā)生的,應(yīng)力傳播非�？�,材料的結(jié)構(gòu)響應(yīng)基本失效,應(yīng)力波受到基體開(kāi)裂等因素的阻礙,應(yīng)力無(wú)法平衡,容易在擺錘接觸材料的位置形成應(yīng)力集中,造成材料斷裂。其中梁高為12mm的材料吸收能量最多,受到的沖擊強(qiáng)度最大;梁高為0mm的材料吸收能量最少,受到的沖擊強(qiáng)度最小。本課題還基于T字型三維整體機(jī)織復(fù)合材料試樣的尺寸,建立同尺寸結(jié)構(gòu)的模型,運(yùn)用ABAQUS有限元軟件模擬計(jì)算同種組織結(jié)構(gòu)下三種不同梁高的T字型三維整體機(jī)織復(fù)合材料的三點(diǎn)彎曲性能,模擬得到的載荷-位移曲線、吸收能量-位移關(guān)系曲線及破壞形態(tài)與實(shí)驗(yàn)結(jié)果相比有較好的一致性�？梢�(jiàn),所建模型較正確,為今后T字型三維整體機(jī)織復(fù)合材料彎曲力學(xué)性能模擬,提供一定幫助,可反過(guò)來(lái)為梁高對(duì)試樣的影響提供一定指導(dǎo),減少試驗(yàn)量。
[Abstract]:As a common engineering structure, T-beam is widely used in aerospace navigation and architecture. Due to uncertainties, some external damage may be caused by bird strikes, rain, snow or hail, and ship impacts. Three-dimensional woven structure, as a composite reinforcement, has special structural characteristics and excellent mechanical properties compared with three-dimensional knitted structure and three-dimensional braided structure. Therefore, the design and manufacture of T-shaped 3D monolithic woven composites with high bending strength and impact resistance have a promising application prospect. In this paper, glass filament beam is used as warp yarn and basalt filament beam is used as weft yarn to weave three kinds of T-shaped three-dimensional woven fabrics with different beam height on ordinary sample loom at low cost, and VARTM (Vacuum Assistant Resin transfer Moulding) process is used to fabricate composite material. The three-point bending behavior of three T-shaped 3D monolithic woven composites with different beam heights was tested by electronic universal testing machine, and the failure mode and energy absorption mode of T-shaped 3D monolithic woven composites were studied. From the load-displacement curve and absorption energy-displacement curve diagram obtained from the experiment, with the increase of displacement, the T-shaped 3D monolithic woven composite with a beam height of 12 mm can carry the maximum load and absorb the energy. The T-shaped three-dimensional monolithic woven composite with 0mm beam height is the smallest. According to the ultimate failure pattern of the material, the material with a beam height of 0 mm shows typical bending failure mode, the front of the beam is subjected to compression damage, the back side of the material is damaged by tensile damage, and the front of the material with the beam height of 6 mm and 12 mm shows compression failure. The back side is shear failure. It can be seen that matrix cracking, fiber and resin debonding and fiber fracture are the main energy absorption modes in the bending failure mode of materials. In the impact test of simply supported beam, the impact process of T-shaped 3D monolithic woven composites is almost instantaneous, the stress propagation is very fast, the structural response of the material is basically invalid, and the stress wave is hindered by the cracking of matrix, etc. The stress can not be balanced, and it is easy to form stress concentration in the position of the pendulum hammer contact material, resulting in material fracture. The material whose beam height is 12mm absorbs the most energy and receives the greatest impact strength, while the material with the beam height of 0mm absorbs the least energy and receives the least impact strength. The model of the same size structure is also established based on the size of T-shaped 3D monolithic woven composite material. By using Abaqus finite element software, the three-point bending behavior of three T-shaped 3D monolithic woven composites with different beam heights under the same structure was simulated, and the load-displacement curves were obtained. Compared with the experimental results, the absorption energy displacement curve and the failure pattern are in good agreement. It can be seen that the established model is more correct, which can provide some help for the simulation of bending mechanical properties of T-shaped 3D monolithic woven composites in the future, which can in turn provide some guidance for the influence of beam height on the specimen, and reduce the amount of test.
【學(xué)位授予單位】：大連工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TS106;TB33

【相似文獻(xiàn)】

相關(guān)期刊論文 前7條

1 王順興;;單個(gè)鋼球壓碎試驗(yàn)及其評(píng)價(jià)指標(biāo)[J];熱處理;2012年04期

2 關(guān)凱書(shū);王志文;;材料微觀缺陷對(duì)其小沖桿試驗(yàn)結(jié)果的影響[J];機(jī)械工程材料;2011年04期

3 喻燦;張恩勇;章曉程;陳吉;白濤;關(guān)凱書(shū);;小沖桿試驗(yàn)的有限元模擬中GTN模型參數(shù)的確定[J];實(shí)驗(yàn)力學(xué);2014年01期

4 孫樹(shù)華,田常海;Ⅰ-Ⅲ復(fù)合型裂紋主位移[J];鞍鋼技術(shù);2000年05期

5 唐振廷;白杰;葉宏德;;945結(jié)構(gòu)鋼韌脆轉(zhuǎn)變過(guò)程中的纖維斷面率與韌性斷面率之間關(guān)系的研究[J];汽車工藝與材料;2005年12期

6 郭運(yùn)強(qiáng);張克實(shí);耿小亮;劉芹;秦亮;;基體性質(zhì)對(duì)含涂層系統(tǒng)壓痕響應(yīng)的影響[J];材料工程;2006年06期

7 ;[J];;年期

相關(guān)會(huì)議論文 前3條

1 倉(cāng)鑫;張世聯(lián);鄭軼刊;;樁腿耦合緩沖器載荷-位移特性的有限元分析[A];中國(guó)鋼結(jié)構(gòu)協(xié)會(huì)海洋鋼結(jié)構(gòu)分會(huì)2010年學(xué)術(shù)會(huì)議暨第六屆理事會(huì)第三次會(huì)議論文集[C];2010年

2 張俊寶;史弼;楊曉萍;王秀芳;宋洪偉;;GCr15鋼微觀組織力學(xué)表征[A];中國(guó)力學(xué)學(xué)會(huì)學(xué)術(shù)大會(huì)'2005論文摘要集（下）[C];2005年

3 張皓;宋海鵬;亢一瀾;黃干云;曲傳詠;;壓頭載荷作用下巖石損傷破壞的實(shí)驗(yàn)研究[A];第16屆全國(guó)疲勞與斷裂學(xué)術(shù)會(huì)議會(huì)議程序冊(cè)[C];2012年

相關(guān)碩士學(xué)位論文 前3條

1 閆淑娟;T字型三維機(jī)織物設(shè)計(jì)及其復(fù)合材料力學(xué)性能分析[D];大連工業(yè)大學(xué);2015年

2 陳吉;小沖桿試驗(yàn)中GTN模型及有限元應(yīng)力應(yīng)變分析[D];華東理工大學(xué);2013年

3 張廣哲;小沖桿試樣厚度尺寸對(duì)斷裂影響的研究[D];華東理工大學(xué);2012年

，

本文編號(hào)：2068296