足彩跟单app


关于拉伸试验中延伸率的精度问题探讨

2016-05-06  浏览量:376

延伸率拉伸测试中考察材料韧性值的一个重要指标,是指材料在拉伸过程中产生变形伸长或收缩的物理参量。如何把握测试过程的精度要求,现做以下探讨:

足彩跟单appDIYI,SHOUXIANYAOGENJUCAILIAOJINXINGFENLEI,FENWEIJINSHUHEFEIJINSHULIANGZHONG,ZHEILIANGZHONGCAILIAOZAILASHENGUOCHENGZHONGCHANSHENGDEZHUANGTAIYEBUYIYANG。FEIJINSHUCAILIAOYOUYURENXINGBIJIAOHAO,DUANLIESHICHANSHENGDEZHENDONGBIJIAOXIAO(KEYIHULVEBUJI),ZHEIZHONGJIUKEYICAIYONGJIACHISHIYINSHENJI,YIBAOZHENGCESHIJINGDUWENTI。ERJINSHUZAIDUANLIESHIHUICHANSHENGGUODADEZHENDONG,ZHEIYANGJIACHISHIYINSHENJIYEHUICHANSHENGXIANGYINGDEHUADONG,ZHEIYANGCESHICHULAIDEJIEGUOJIUHUIBUZHUNQUE。GUZUOJINSHUDEDUANHOUSHENZHANGLVSHI,TONGCHANGCAIYONGBADUANLIEYANGPINPINJIEZAIYIQI,YONGYOUBIAOKACHICELIANGZUIZHONGDEBIANXINGLIANG。ZHEIYANGCICESHIDECELIANGJINGDUJIUSHIKACHIDEJINGDU,XIANZAIDEJINGDUSHI0.02mmDEJINGDUKACHI。QITARUQUFUSHENZHANGLVHUOYIXIEZAIDUANLIEZHIQIANDEYANSHENLVCANSHUDOUKEYIYONGJIACHISHIYINSHENJILAIJINXINGCESHI。

第二,现在最常见的引伸计有:机械式引伸计、光学引伸计和电磁式引伸计足彩跟单app。机械引伸计就是我们常用大变形引伸计、金属引伸计和全自动引伸计,这类引伸计需要加持在样品表面测试出行变量。如大变形引伸计是专门针对非金属材料设计的引伸计,变形量可以达到80cm甚至更高。分辨率为0.008mm。金属引伸计的变形量一般最大为25mm,试验精度为1.5um。这两类引伸计是现阶段最常用的引伸计,也都有相应的局限性,只有合理的利用测试方法才能避免最后的结果误差。

DISAN,YISHANGWENTIDEQUEXIAN,GUANGZHAYINSHENJIDOUKEYIJIEJUE,CIYINSHENJIKUAISUJINGZHUN,FENBIANLVGAO,JINGDUWEI1um。SHIZUIJIADEGONGJU,DANCIYINSHENJIZAOJIAGUOGUI,YIBANDECELIANGJIGOUDOUMEIYOUPEIBEICIZHONGSHEBEI。

 

ZONGJIE:

1、YINSHENJIZHUYAOYONGYUCEDINGXINGBIANLIANG,CHANGCEDECANSHUYOUYANSHENLV,BOSONGBI,nZHI,rZHI。

2、ZAICESHIGUOCHENGZHONGXUYONGHESHIDEGONGJUHEFANGFASHIKEYIXIAOCHUBUBIYAODECESHIWUCHA,BUNENGGUANGGUANZHUJINGDUWENTI,ERHUSHIZAISHIJICELIANGGUOCHENGZHONGDESHIXIAOXING。

3、MUQIANWOMENSHIYANSHIYOUDEYINSHENJILEIXINGSHIDABIANXINGYINSHENJIHEJINSHUYINSHENJI。QIZHONG

①JINSHUYINSHENJIYOULIANGZHONGBIAOJU(YUANSHIBIAOJU)DEGUIGE:50mmHE100mm,BIANXINGLIANGWEI10mm;YINWEIQIANMIANSUOLIEYUANYIN,JINSHUDUANLIESHENZHANGLVBUHUIYONGYINSHENJICESHI,QUFUYANSHENLVHUODUANLIEQIANDEQITAYANSHENLVHUIXUYAOYINSHENJI;

②DABIANXINGYINSHENJIDEBIANXINGLIANGWEI80cm,YUANSHIBIAOJUKESUIYIDIAOJIE,SHIYONGYUSULIAO,XIANGJIAO,JIAODAIDEYANSHENLVCEDING,GENGBODEYANGPINRUBAOXIANMOZEBUSHIYONG。

足彩跟单app4、SHOUDONGCELIANGYUYINSHENJIDEJINGDUDUIBI,KACHISHI0.02mm,YINSHENJISHI0.0015mm,CUNZAIZHE10DUOBEI。DANBIAOZHUNZHONGZUIHOUJIEGUOGUIDING:QITAYANSHENLVJIDUANHOUYANSHENLVXIUYUEZHI0.5%。YOUCIKEJIANJINGDUGAODESHEBEI,ZAICIZUOCHULAIYINGGAIHESHOUDONGCESHIDEJIEGUOSHIYIZHIDE。

 

足彩跟单app*** YISHANGNEIRONGJUNWEIYUANCHUANG,RUXUZHUANZAI,QINGZHUMINGCHUCHU ***

 

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