摘要：刘志文《穹》作品简介:设计灵感来源于《敕勒歌》“天似穹弯”,意为无限和永恒。薛原《畅游》瓷板画作品简介:综合装饰类瓷板画,用青花、颜色釉,来表现生命的多彩和乐趣。李建陶艺作品《寒武纪》作品简介:该作品运用拉坯成型,烧成后用高温色剂作颜料,并用较纯的颜色画出生命之初的热情和跳跃。

摘要：本文以宁夏民族职业技术学院室内艺术设计专业为例,深入探讨了冠名班模式下的实践教学和校企协同育人策略。该模式通过与企业合作,解决了实践教学中的问题,如理论与实践脱节、课程设置不合理等,提升了人才培养效率。本文提出了构建系统化实践教学体系,优化课程体系,并依托企业资源推进实践教学。同时,通过创新实践平台、团队建设、教材开发等策略,促进学生全面发展。冠名班模式强化了教育的系统性和紧密性,实现了分类培养,满足了学生成长需求,为地方文化创意产业输送了优秀人才。

摘要：在井下作业环境中,设备遭受的腐蚀问题极为严重,易造成设备损坏和重大安全事故。针对核桃峪井下设备的防腐蚀需求,提出了一种新颖的激光熔覆高熵合金内涂层与环氧树脂外涂层相结合的复合表面涂层防腐蚀策略。通过设置高熵合金内涂层以提高涂层的整体黏附强度和耐磨性,进一步引入高致密性环氧树脂作为外涂层,并对环氧树脂进行化学改性以降低涂层的自腐蚀电流,同时,构筑高熵合金/环氧树脂Cassie界面模型,赋予涂层超疏水性。结果表明:对高熵合金进行1.0%的SiC掺杂后,涂层力学性能和抗氧化、抗化学腐蚀性能得到明显提升;引入改性环氧树脂涂层后,涂层的腐蚀电流显著降低,抗老化性能显著提高;宏观腐蚀测试结果也证明复合涂层具有优异的抗腐蚀性。该研究为复杂环境中设备的防腐蚀提供了新思路。

摘要：The isothermal extrusion process of hollow aluminium profile was investigated using incremental proportional-integral-derivative(PID)control algorithm and finite element *** range of extrusion speed was determined by considering the maximum extrusion load and production *** taking the optimal solution temperature of the secondary phase as the target temperature,the extrusion speed–stroke curve for realizing the isothermal extrusion of the aluminium profile was *** show that in the traditional constant extrusion speed process,the average temperature of the cross-section of the aluminium profile at the die exit rapidly increases and then slowly rises with the increase in ram *** the extrusion speed increases,the temperature difference at the die exit of the profile along the extrusion direction *** exit temperature difference between the front and back ends of the extrudate along the extrusion direction obtained by adopting isothermal extrusion is about 6.9℃.Furthermore,the heat generated by plastic deformation and friction during extrusion is balanced with the heat transfer from the workpiece to the container,porthole die and external environment.

摘要：考虑到空气动力学、结构力学和美观等方面的要求,车身用铝合金构件需要弯曲成特定的曲率,对产品的质量提出更高要求。制造铝合金框架式车身的关键技术在于如何实现轻量化构件的高精度弯曲成形。概述几种典型的传统2D冷弯成形工艺及质量控制方法。针对采用传统冷弯工艺时产品缺陷难以控制和避免、制造成本高等缺点,开发具有高效、短流程和低成本的弯曲新工艺已成为塑性加工领域备受关注并得到迅速发展的重要方向之一。介绍了几种管、型材空间冷弯一体化成形新工艺;全面综述近15年来国内外学者开发的一系列热挤压-弯曲一体化成形新工艺。并介绍本文作者所在课题组针对传统冷弯和已有挤压-弯曲一体化成形工艺存在的缺点,发明一种结合在线淬火控温的挤压-弯曲一体化成形新工艺和装备,并展望了该工艺未来的研究趋势。

摘要：为研究CAARC高层建筑标准模型在下击暴流作用下的响应,采用所开发的基于边界层风洞的下击暴流出流风速模拟试验装置模拟下击暴流稳态风场和瞬变风场,设计并制作了几何缩尺比为λL=1∶200的CAARC气弹模型,分别在下击暴流稳态风、瞬态风以及大气边界层B类风场条件下进行了风洞试验研究.结果表明:所模拟的稳态下击暴流风速剖面与经验风速剖面较为吻合;所模拟的瞬态下击暴流风速时程特性、湍流度与已有文献推荐值总体较为吻合;CAARC高层建筑标准模型在稳态、瞬态下击暴流风场作用下,顶部x、y方向位移时程波动较大,与大气边界层B类风场作用下位移时程存在明显差异.

摘要：The effect of dynamic recrystallization(DRX)on the microstructure and mechanical properties of 6063 aluminum alloy profile during porthole die extrusion was studied through experiment and *** grain morphology was observed by means of electron backscatter diffraction(EBSD)*** results show that,at low ram speeds,increasing the ram speed caused an increase in DRX fraction due to the increase of temperature and strain *** contrast,at high ram speeds,further increasing ram speed had much less effect on the temperature,and the DRX faction decreased due to high stain *** microhardness and fraction of low angle boundaries in the welding zones were lower than those in the matrix *** grain size in the welding zone was smaller than that in the matrix zone due to lower DRX *** decrease of grain size and increase of extrudate temperature were beneficial to the improvement of microhardness.

摘要：3D elastic-plastic FE model for simulating the force controlled stretch-bending process of double-cavity aluminum profile was established using hybrid explicit−implicit solvent *** the computational accuracy and efficiency,the optimal choices of numerical parameters and algorithms in FE modelling were *** formation mechanisms of cross-section distortion and springback were *** effects of pre-stretching,post-stretching,friction,and the addition of internal fillers on forming quality were *** results show that the stress state of profile in stretch-bending is uniaxial with only a circumferential *** stress distribution along the length direction of profile is non-uniform and the maximum tensile stress is located at a certain distance away from the center of *** aluminum profile is gradually attached to bending die,the distribution characteristic of cross-section distortion along the length direction of profile changes from V-shape to *** unloading the forming tools,cross-section distortion decreases obviously due to the stress relaxation,with a maximum distortion difference of 13%before and after *** pre-stretching and post-stretching forces increase,cross-section distortion increases gradually,while springback first decreases and then remains *** increasing friction between bending die and profile,cross-section distortion slightly decreases,while springback ***-section distortion decreases by 83%with adding PVC fillers into the cavities of profile,while springback increases by 192.2%.

摘要：采用Gleeble-3500热模拟实验机,分析6013铝合金在变形温度613~773 K、应变速率10-3~10 s-1和工程变形量10%~60%条件下的平面热压缩变形流变应力演化规律,求解热变形本构方程,建立热加工图,探讨其热变形行为机理。结果表明,6013铝合金的流变软化机制以动态回复为主;采用包含关于变形温度函数的幂函数本构方程可较好的预测其流变行为,与实测值的平均相对误差仅为6.631%;确定了单道次大应变热轧成型最佳工艺参数区间:673 K<T<773 K且5×10-3s-1<ε<10-1s-1和多道次热轧最佳工艺参数区间:633 K<T<733 K且10-1s-1<ε<1 s-1。

摘要：以6063铝合金薄壁梁结构为研究对象,采用准静态轴向加载的方式,借助WAW-E600型微控万能试验机,探明诱导孔结构对铝合金薄壁梁压缩变形行为与吸能性能的影响规律。研究表明:单排诱导孔能够使试样的变形模式由欧拉模式转变为混合模式,提高试样变形的稳定性,降低载荷峰值,吸能性能增加26.78%。多排诱导孔的位置与尺寸对薄壁梁的变形有较大影响,试样中部的诱导孔会降低结构稳定性,使试样失稳以欧拉模式变形为主,其载荷水平及吸能性能均较低;尺寸呈梯度变化的诱导孔能够使试样发生手风琴模式的变形,试样顺序压溃,载荷波动平稳,吸能性能较高;大尺寸诱导孔会使试样在局部发生剪切变形并逐层顺序压溃,其载荷平稳,是一种新的变形模式。通过实验数据对比,系统研究诱导孔尺寸对临界载荷的影响规律,并基于线形回归理论,建立铝合金薄壁梁结构临界载荷与截面惯性矩之间的定量关系。