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sheet metal stretch
相关语句
  板料拉伸
     Optimization of Multipoint Blank Holder Pressure for Sheet Metal Stretch Forming
     板料拉伸成形多点压边力优化
短句来源
  “sheet metal stretch”译为未确定词的双语例句
     Strain Analysis and Determination of Sheet Metal Stretch Instability
     拉伸失稳的应变分析与确定
短句来源
     Numerical calculation and analysis on spring back of sheet metal stretch bending
     宽板拉弯的数值分析与回弹计算
短句来源
     Damage,Instability and Construction of Forming Limit Curve in Sheet Metal Stretch Forming
     板材拉伸成形中损伤、失稳与成形极限曲线的建立
短句来源
     Influence of Bauschinger effect on springback in sheet metal stretch bending
     包辛格效应对板材拉弯回弹的影响
短句来源
  相似匹配句对
     Sheet Metal Processing
     板料加工
短句来源
     The Vibration of Round Sheet Metal
     圆形薄板的振动
短句来源
     Stretch of the City's Floor
     城市底面的延展
短句来源
     Rotary stretch blow moulders
     旋转式拉伸吹瓶机
短句来源
     Distortion of STRETCH Signal in ISAR
     逆合成孔径雷达中STRETCH信号畸变的分析
短句来源
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  sheet metal stretch
An elasto-plastic finite element analysis of the sheet metal stretch flanging process
      


Stretch forming is the basic method for aircraft skin.Defects in sheet metal stretch forming are ana- lyzed.In order to get reasonable parameters,the idea of combing finite element analysis and optimization algo- rithms is adopted,and response surface method is suggested to improve the efficiency of the retrieval.Based on the analysis of the mechanism of springback in double curve skin stretch forming,the reasonable pre-stretch rate is found through the numerical simulation and NPQLP optimization...

Stretch forming is the basic method for aircraft skin.Defects in sheet metal stretch forming are ana- lyzed.In order to get reasonable parameters,the idea of combing finite element analysis and optimization algo- rithms is adopted,and response surface method is suggested to improve the efficiency of the retrieval.Based on the analysis of the mechanism of springback in double curve skin stretch forming,the reasonable pre-stretch rate is found through the numerical simulation and NPQLP optimization algorithm under the restrictive of max- imal thickness strain.According to the result both numerical simulation and experiment have verified that the strain uniformity is improved and springback is reduced 21.87%.

拉伸成形是飞机板金的基本成形方法。结合蒙皮拉伸成形常见的缺陷及影响因素,简述了最优化理论结合数值模拟优化工艺参数的必要性。以双曲度蒙皮为例,分析了产生回弹的机理和影响因素。采用正交试验设计建立响应曲面,序列二次规划和混合整数优化相结合的优化算法,以厚度减薄率为约束条件,对成形工艺参数预拉伸率进行优化,并对优化结果进行试验验证。结果表明优化拉形工艺参数后零件变形均匀程度提高,回弹减小了21.87%。

To theoretically investigate the influence of Bauschinger effect on springback in sheet metal stretch bending,the constitution relation of a kinematic hardening was used to determine the stress distributions of stretch bending by numerical calculation,so that the springback was calculated.They were compared with the results calculated according to the constitution relation of an isotropic hardening.The function of Bauschinger effect on springback during stretch bending was analyzed in accordance...

To theoretically investigate the influence of Bauschinger effect on springback in sheet metal stretch bending,the constitution relation of a kinematic hardening was used to determine the stress distributions of stretch bending by numerical calculation,so that the springback was calculated.They were compared with the results calculated according to the constitution relation of an isotropic hardening.The function of Bauschinger effect on springback during stretch bending was analyzed in accordance with the distinguishing feature of those distributions.The results of investigation show that in bending after stretch Bauschinger effect is beneficial to decreasing the springback and its influence is little,for small is either pre-stretching or the zone which loads in the opposite direction are acting on;and that in stretching after bend it is detrimental to reducing the springback,but its influence is not evident,for alteration to the inner bending moment and the curvature radius of strain neutral surface is restricted mutually.

为从理论上研究包辛格效应对板材拉弯回弹的影响,利用随动强化本构方程,采用数值方法,确定拉弯的应力分布,由此计算回弹,并与按等向强化本构方程计算的结果加以比较,根据应力分布的特点,分析包氏效应对拉弯回弹的作用.研究结果表明,对于先拉后弯,包氏效应有利于降低回弹,但由于预拉伸量较小,或反向加载区域较小,其影响不大;对于先弯后拉,包氏效应不利于减小回弹,但由于应变中性层曲率半径与内弯矩的变化相互制约,其影响也不大.

 
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