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基于Moldflow和Ansys的塑件工艺参数优化和受力分析 被引量:1
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作者 刘月云 《轻工科技》 2015年第11期36-37,共2页
将使用Pro/E造型后的仪表外壳模型导入Moldflow中,在对其网格划分、浇口设置和水道布置后进行模流分析。以翘曲量为控制对象设计塑件模流分析的正交实验,优化出合理的注塑工艺参数。利用最优工艺参数进行注塑模拟,将结果导入Ansys中进... 将使用Pro/E造型后的仪表外壳模型导入Moldflow中,在对其网格划分、浇口设置和水道布置后进行模流分析。以翘曲量为控制对象设计塑件模流分析的正交实验,优化出合理的注塑工艺参数。利用最优工艺参数进行注塑模拟,将结果导入Ansys中进行静载模拟分析得出塑件的应力分布,得出仪表外壳的最大应力发生在两带孔的凸台处,但最大应力远低于PP塑料的许用应力,能够满足使用。 展开更多
关键词 仪表外壳 正交实验 模流分析 静载模拟
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装配式钢筋砼拱桥节点抗震加固性能评估研究 被引量:4
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作者 张海明 陈蓉 +2 位作者 黄元文 吴永红 冉志红 《中国水运(下半月)》 2018年第10期201-202,共2页
钢筋混凝土拱桥在西南山区应用广泛,但早期建造的大量此类桥梁抗震能力不足。为有效提高在役装配式钢筋混凝土箱型拱桥的抗震性能,以云南怒江碧福大桥为对象,设计了三种桥梁主拱与立柱连接节点抗震加固分析模型,提出采用拟静力加载三维... 钢筋混凝土拱桥在西南山区应用广泛,但早期建造的大量此类桥梁抗震能力不足。为有效提高在役装配式钢筋混凝土箱型拱桥的抗震性能,以云南怒江碧福大桥为对象,设计了三种桥梁主拱与立柱连接节点抗震加固分析模型,提出采用拟静力加载三维非线性数值模拟方法,分析加固节点模型的位移和荷载,进一步分析模型耗能滞回曲线及转角弯矩曲线。结果表明:常用加固方法均有抗震作用;外包钢板加固抗震性能较好,且抗震潜力大,可抵御较强的地震作用。 展开更多
关键词 在役装配式钢筋混凝土箱型拱桥 抗震性能 节点加固 力加数值模拟
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Numerical simulation of dynamic fracture properties of rocks under different static stress conditions 被引量:6
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作者 LIANG Zheng-zhao QIAN Xi-kun +1 位作者 ZHANG Ya-fang LIAO Zhi-yi 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第2期624-644,共21页
When underground cavities are subjected to explosive stress waves,a uniquely damaged zone may appear due to the combined effect of dynamic loading and static pre-load stress.In this study,a rate-dependent two-dimensio... When underground cavities are subjected to explosive stress waves,a uniquely damaged zone may appear due to the combined effect of dynamic loading and static pre-load stress.In this study,a rate-dependent two-dimensional rock dynamic constitutive model was established to investigate the dynamic fractures of rocks under different static stress conditions.The effects of the loading rate and peak amplitude of the blasting wave under different confining pressures and the vertical compressive coefficient(K_(0))were considered.The numerical simulated results reproduced the initiation and further propagation of primary radial crack fractures,which were in agreement with the experimental results.The dynamic loading rate,peak amplitude,static vertical compressive coefficient(K_(0))and confining pressure affected the evolution of fractures around the borehole.The heterogeneity parameter(m)plays an important role in the evolution of fractures around the borehole.The crack propagation path became more discontinuous and rougher in a smallerheterogeneity parameter case. 展开更多
关键词 rock mechanics coupled static and dynamic loading numerical simulation rate-dependent damage constitutive model
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Three-dimensional finite element analysis of lumbar vertebra loaded by static stress and its biomechanical significance 被引量:9
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作者 苏佳灿 李卓东 +3 位作者 曹烈虎 禹宝庆 张春才 李明 《Chinese Journal of Traumatology》 CAS 2009年第3期153-156,共4页
Objective: To explore the mechanical behavior of lumbar spine loaded by stress and provide the mechanical basis for clinical analysis and judgement of lumbar spine fracture classification, mechanical distribution and... Objective: To explore the mechanical behavior of lumbar spine loaded by stress and provide the mechanical basis for clinical analysis and judgement of lumbar spine fracture classification, mechanical distribution and static stress. Methods: By means of computer simulation method, the constructed lumbar spine three-dimensional model was introduced into three-dimensional finite element analysis by software Ansys 7.0. The lumbar spine mechanical behavior in different parts of the stress loading were calculated. Impact load is 0-8000 N. The peak value was 8000 N. The loading time is 0-40 minutes. The values of the main stress, stress distribution and the lumbar spine unit displacement in the direction of main stress were analyzed. Results: The lumbar spine model was divided into a total of 121 239 nodes, 112 491 units. It could objectively reflect the true anatomy of lumbar spine and its biomechanical behavior and obtain the end-plate images under different stress. The stress distribution on the lumbar intervertebral disc (L3-L4) under the axial, lateral flexion and extension stress, and the displacement trace of the corresponding processus articularis were analyzed. Conclusion: It is helpful to analyze the stress distribution of lumbar spine and units displacement in static stress loading in the clinical research of lumbar spine injury and the distribution of internal stress. 展开更多
关键词 Lumbar vertebrae Models anatomical Stress mechanical
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