本文主要研究内容
作者韩晓果（2019）在《气流冲击下紧密织物面外变形及其动态透气性能的研究》一文中研究指出：紧密织物强度高、变形量小、透气性弱,是多数气囊类防护装置（比如车用安全气囊、穿戴式气囊、软着陆缓冲气囊等）的常用面料。紧密织物在防护时,延长了冲击时间,降低了冲击力,可起到良好的保护效果。在此过程中,织物内的交织结构会因承受较高压力而发生面外变形,织物孔隙率及透气性能也随之改变,从而影响着其延缓冲击的时间和效果。因此探究该织物气流冲击下面外变形及动态透气性的变化将具有重要的意义。目前,国内外对紧密织物气压下面外变形的研究缺乏理论深度。在实验研究紧密织物结构和变形的基础上,从机理的角度探索纤维纱线等线性材料及其交织结构在气流冲击下面外变形的力学问题,以及面外变形的可预测性、可模拟性、对动态透气性能的影响性等,为设计新型抗冲击应急防护面料提供理论指导。因此,主要涉及三个方面的研究内容:一、气流冲击下紧密织物结构和力学参数的研究,主要探索不同紧度机织物在准静态均压下面外变形产生的结构和机械性能的变化。结果发现,紧密织物结构和紧度存在临界点,织物紧度高于临界点时,高压气流冲击使得织物相邻纱线更加紧密交叠,导致织物面外变形下紧度提升,透气性降低,防护缓冲时间延长;当织物结构或紧度低于临界点时,气流冲击织物面外变形,织物纱线之间的孔隙增大,透气性提高,防护缓冲时间缩短。同时,研究了织物面内伸长过程中,泊松比和模量的变化规律,分析发现,纱线交织结构的泊松比随拉伸应变不同而改变,其中,织物拉伸截面宽度小、织物弹性大、靠近夹持点区域和织物纬向拉伸时,泊松比数值相对较大。根据应力-应变拉伸曲线,测量五种织物的模量,为第二部分研究内容-建立数学模型并预测面外变形量提供了参考值。二、紧密织物准静态气压下面外变形的机理分析。设计制备了五种不同紧密结构的织物,通过自行搭建的织物面外变形仪,在方形及圆形边界约束条件下,进行准静态气压下织物变形试验,得到织物的变形轮廓曲线及最大变形量w0。结果发现,织物面外变形与织物泊松比呈正相关,与模量呈负相关。结合“能量最小化理论”和“板壳理论”,建立了两种约束条件的紧密织物均压下面外变形的系统能量平衡方程（机理模型）,从能量最小化的角度建立了织物变形系统的最大变形量w0和变形轮廓曲线。通过对五种紧密织物变形的测量值与解析预测值进行比较发现,试验值与理论预测值之间的误差,圆形约束条件下小于12.6%,方形约束条件下小于20%,皆小于工程上所允许的误差值,证明本数学模型具有一定的精确性,可预测其它紧密织物在准静态气压下的面外变形。三、动态气流冲击下紧密织物面外变形与透气性能的研究。利用实验法,分析比较五种不同紧密织物在动态气压下面外变形的动态规律及透气性变化规律。实验表明,动态气压下,织物在前期迅速变形,在2s内达到一个相对稳定的变形量,并随着受力时间的延长,产生蠕变现象。对同一块织物多次气流冲击条件下,w0会有增大的趋势。织物的透气性与织物的紧密度密切相关,紧度高于临界点的织物在高气压冲击下,初始透气性逐渐下降。织物在持续气流冲击过程中,透气性不断增大,最终达到最大值。此外,动态透气性与织物所承受的初始气压值和织物中纱线的形态也密切相关。
Abstract
jin mi zhi wu jiang du gao 、bian xing liang xiao 、tou qi xing ruo ,shi duo shu qi nang lei fang hu zhuang zhi （bi ru che yong an quan qi nang 、chuan dai shi qi nang 、ruan zhao liu huan chong qi nang deng ）de chang yong mian liao 。jin mi zhi wu zai fang hu shi ,yan chang le chong ji shi jian ,jiang di le chong ji li ,ke qi dao liang hao de bao hu xiao guo 。zai ci guo cheng zhong ,zhi wu nei de jiao zhi jie gou hui yin cheng shou jiao gao ya li er fa sheng mian wai bian xing ,zhi wu kong xi lv ji tou qi xing neng ye sui zhi gai bian ,cong er ying xiang zhao ji yan huan chong ji de shi jian he xiao guo 。yin ci tan jiu gai zhi wu qi liu chong ji xia mian wai bian xing ji dong tai tou qi xing de bian hua jiang ju you chong yao de yi yi 。mu qian ,guo nei wai dui jin mi zhi wu qi ya xia mian wai bian xing de yan jiu que fa li lun shen du 。zai shi yan yan jiu jin mi zhi wu jie gou he bian xing de ji chu shang ,cong ji li de jiao du tan suo qian wei sha xian deng xian xing cai liao ji ji jiao zhi jie gou zai qi liu chong ji xia mian wai bian xing de li xue wen ti ,yi ji mian wai bian xing de ke yu ce xing 、ke mo ni xing 、dui dong tai tou qi xing neng de ying xiang xing deng ,wei she ji xin xing kang chong ji ying ji fang hu mian liao di gong li lun zhi dao 。yin ci ,zhu yao she ji san ge fang mian de yan jiu nei rong :yi 、qi liu chong ji xia jin mi zhi wu jie gou he li xue can shu de yan jiu ,zhu yao tan suo bu tong jin du ji zhi wu zai zhun jing tai jun ya xia mian wai bian xing chan sheng de jie gou he ji xie xing neng de bian hua 。jie guo fa xian ,jin mi zhi wu jie gou he jin du cun zai lin jie dian ,zhi wu jin du gao yu lin jie dian shi ,gao ya qi liu chong ji shi de zhi wu xiang lin sha xian geng jia jin mi jiao die ,dao zhi zhi wu mian wai bian xing xia jin du di sheng ,tou qi xing jiang di ,fang hu huan chong shi jian yan chang ;dang zhi wu jie gou huo jin du di yu lin jie dian shi ,qi liu chong ji zhi wu mian wai bian xing ,zhi wu sha xian zhi jian de kong xi zeng da ,tou qi xing di gao ,fang hu huan chong shi jian su duan 。tong shi ,yan jiu le zhi wu mian nei shen chang guo cheng zhong ,bo song bi he mo liang de bian hua gui lv ,fen xi fa xian ,sha xian jiao zhi jie gou de bo song bi sui la shen ying bian bu tong er gai bian ,ji zhong ,zhi wu la shen jie mian kuan du xiao 、zhi wu dan xing da 、kao jin ga chi dian ou yu he zhi wu wei xiang la shen shi ,bo song bi shu zhi xiang dui jiao da 。gen ju ying li -ying bian la shen qu xian ,ce liang wu chong zhi wu de mo liang ,wei di er bu fen yan jiu nei rong -jian li shu xue mo xing bing yu ce mian wai bian xing liang di gong le can kao zhi 。er 、jin mi zhi wu zhun jing tai qi ya xia mian wai bian xing de ji li fen xi 。she ji zhi bei le wu chong bu tong jin mi jie gou de zhi wu ,tong guo zi hang da jian de zhi wu mian wai bian xing yi ,zai fang xing ji yuan xing bian jie yao shu tiao jian xia ,jin hang zhun jing tai qi ya xia zhi wu bian xing shi yan ,de dao zhi wu de bian xing lun kuo qu xian ji zui da bian xing liang w0。jie guo fa xian ,zhi wu mian wai bian xing yu zhi wu bo song bi cheng zheng xiang guan ,yu mo liang cheng fu xiang guan 。jie ge “neng liang zui xiao hua li lun ”he “ban ke li lun ”,jian li le liang chong yao shu tiao jian de jin mi zhi wu jun ya xia mian wai bian xing de ji tong neng liang ping heng fang cheng （ji li mo xing ）,cong neng liang zui xiao hua de jiao du jian li le zhi wu bian xing ji tong de zui da bian xing liang w0he bian xing lun kuo qu xian 。tong guo dui wu chong jin mi zhi wu bian xing de ce liang zhi yu jie xi yu ce zhi jin hang bi jiao fa xian ,shi yan zhi yu li lun yu ce zhi zhi jian de wu cha ,yuan xing yao shu tiao jian xia xiao yu 12.6%,fang xing yao shu tiao jian xia xiao yu 20%,jie xiao yu gong cheng shang suo yun hu de wu cha zhi ,zheng ming ben shu xue mo xing ju you yi ding de jing que xing ,ke yu ce ji ta jin mi zhi wu zai zhun jing tai qi ya xia de mian wai bian xing 。san 、dong tai qi liu chong ji xia jin mi zhi wu mian wai bian xing yu tou qi xing neng de yan jiu 。li yong shi yan fa ,fen xi bi jiao wu chong bu tong jin mi zhi wu zai dong tai qi ya xia mian wai bian xing de dong tai gui lv ji tou qi xing bian hua gui lv 。shi yan biao ming ,dong tai qi ya xia ,zhi wu zai qian ji xun su bian xing ,zai 2snei da dao yi ge xiang dui wen ding de bian xing liang ,bing sui zhao shou li shi jian de yan chang ,chan sheng ru bian xian xiang 。dui tong yi kuai zhi wu duo ci qi liu chong ji tiao jian xia ,w0hui you zeng da de qu shi 。zhi wu de tou qi xing yu zhi wu de jin mi du mi qie xiang guan ,jin du gao yu lin jie dian de zhi wu zai gao qi ya chong ji xia ,chu shi tou qi xing zhu jian xia jiang 。zhi wu zai chi xu qi liu chong ji guo cheng zhong ,tou qi xing bu duan zeng da ,zui zhong da dao zui da zhi 。ci wai ,dong tai tou qi xing yu zhi wu suo cheng shou de chu shi qi ya zhi he zhi wu zhong sha xian de xing tai ye mi qie xiang guan 。
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论文作者分别是来自江南大学的韩晓果，发表于刊物江南大学2019-10-21论文，是一篇关于紧密织物论文,面外变形论文,力学参数论文,数学模型论文,透气性能论文,江南大学2019-10-21论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自江南大学2019-10-21论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：紧密织物论文; 面外变形论文; 力学参数论文; 数学模型论文; 透气性能论文; 江南大学2019-10-21论文;