【摘 要】
：
采用实验和固体元数值模拟研究了铝合金矩形截面内高压成形过程塑性变形的发生与发展规律,给出了主应力三维图形可视化表征及在屈服柱面上的应力轨迹,分析了典型点应力及应变
【机 构】
：
哈尔滨工业大学 材料科学与工程学院,航天特种材料及工艺技术研究所,一汽轿车股份有限公司
论文部分内容阅读
采用实验和固体元数值模拟研究了铝合金矩形截面内高压成形过程塑性变形的发生与发展规律,给出了主应力三维图形可视化表征及在屈服柱面上的应力轨迹,分析了典型点应力及应变状态.结果表明:在矩形截面内高压成形过程中,圆角区外层首先发生屈服,圆角区内层两端部分各约1/4区域最后进入塑性变形.圆角区应变状态为沿着厚向缩短和环向伸长的趋势变化,过渡点最先发生塑性变形并且等效应变始终最大.在变形过程中随着内压的增大,过渡点的轴向应力始终为拉应力.
其他文献
In order to study the propulsion mechanism of the bionic flapping hydrofoil (BFH),a 2-DoF (heave and pitch)motion model is formulated.The hydrodynamic performan
This paper presents a numerical study on the hydrodynamic behaviours of a round buoyant jet under the effect of JONSWAP random waves.A three-dimensional large e
This paper is aimed at the whole Bohai Sea,as the complement and improvement of wave characteristics and extreme parameters.Wave fields were simulated in the Bo
以壳聚糖为添加剂,采用无水碳酸钠与氯化钙共沉淀反应制备单分散碳酸钙微粒.利用扫描电镜(SEM),X射线粉末衍射(XRD),傅里叶变换红外吸收光谱(FTIR),热重差热分析(TG-DSC)等方
When studying the harbor water tranquility,cases are often confronted as that the verification point is not located on the generation line or that the angle bet
In using the PGCEVD (Poisson-Gumbel Compound Extreme Value Distribution) model to calculate return values of typhoon wave height,the quantitative selection of t
Cross-shore sediment transport rate exposed to waves is very important for coastal morphology,the design of marine structures such as seawalls,jetties,breakwate
One of the main concerns for pipeline on-bottom stability design is to properly predict ultimate soil resistance in severe ocean environments.A plane-strain fin
采用一种具有特殊表面形貌的空心球-高尔夫球型高铝空心球来配制浇注料,研究了此种高铝空心球添加量、漂珠添加量、黏土添加量对浇注料性能的影响.结果表明:浇注料体积密度和
This paper dealt with the influence of residual stress on the dimensional instability of 7075 aluminum cone-shaped shells. Finite element method was introduced