【摘 要】
：
To investigate the spring-back behavior of dual-phase (DP) steel,V-shape spring-back experiments with different bending angles,relative bending radii and blank
【机 构】
：
China Automotive Engineering Research Institute Co. Ltd.
论文部分内容阅读
To investigate the spring-back behavior of dual-phase (DP) steel,V-shape spring-back experiments with different bending angles,relative bending radii and blank holding forces were carried out in this paper. It is concluded that with the increase of V-shape angle or blank holding force,the spring-back of DP steel sheets de-creases;while raising fillet radius of punch,which has the most apparent effects on spring-back,advances spring-back angle. Among DP590,DP780 and DP980,higher strength yields more notable spring-back due to larger elastic deformation. The difference of spring-back among these materials is relevant with the microstruc-ture and mechanical properties. The total elastic deformation approximately equals the ratio of the strength corre-sponding to the applied load to the modulus of elasticity.
其他文献
In order to speed up the production and save more energy in hot stamping process,the induction heating technology as a new effective heating method is considera
目的 提高人口质量,预防"乙肝"感染.方法 选自2011年9月-2012年9月自愿到我站进行优生检测的有生育愿望的少数民族夫妇698对,共1396人为研究对象.采用酶联免疫吸附试验(ELISA
目的 研究鹰潭地区老年患者骨质疏松的危险因素,为本地区骨质疏松的预防及治疗提供相应的依据.方法 2010年6月-2011年10月从鹰潭地区按城乡人口比例随机抽取市月湖区2个居委
The fatigue behavior of press hardened Al-Si coated high strength steel has been investigated,and the fatigue strength turns out to be about 1 000 MPa. Surface
This paper investigates an approach to improve the engagement quality of controlled transfer clutch mode in 4 wheel drive (WD) car from three considerations of
The fitting method is used for obtaining the constitutive relation of ultra-high strength steel in this pa-per. At the same time,the forming limit of material i
目的 调查儿科护士焦虑心理程度.方法 采用焦虑自评量表(SAS),对我县儿科40名护士及普通科40名护士进行焦虑心理程度的调查.结果 儿科护士的心理焦虑程度和普通科护士比较有
目的 针对宁城县2012年某校流行性腮腺炎暴发流行资料,分析流行原因,为制定防控措施提供依据.方法 采用统一调查表,对所有病例进行个案调查,对搜集的资料进行综合性分析.结果
目的 分析和评价鄂伦春旗2008年至2010年接受直接面视下的短程督导化疗的涂阳肺结核患者效果,为今后结核病的防治提供有益的科学依据.方法 对2008年1月至2010年12月接受国家
目的 了解武警某部退伍军人的健康状况,为进一步做好预防保健指导工作提供依据.方法 收集了连续三年退伍军人586人的健康体检资料,并对资料进行整理分析.结果 在体检结果中,