共查询到14条相似文献,搜索用时 74 毫秒
1.
采用solidworks12.0软件回转窑滚圈和托轮组的模型,然后导入ANSYS Workbench 14.0软件中,使用有限元法对滚圈及与之接触的托轮组进行模态分析(结构力学、接触及疲劳分析)。得到滚圈所承受的接触应力、总体变形以及疲劳寿命的分析云图。而印证滚圈的疲劳寿命能满足使用要求。 相似文献
2.
3.
4.
采用有限元法对密炼机混炼过程中六棱同步转子的位移、应力和应变进行分析.分析中为保证与实际相符,未简化圆角,考虑了重力的影响.分析结果表明,六棱同步转子的危险点主要在长棱的棱根处、长短棱末端的交接处,圆盘根部和转子轴颈处. 相似文献
5.
针对孔洞缺陷的粘赌堵漏,给出了胶粘剂界面韧性应力强度因子,并利用断裂力学中的疲劳裂纹扩展公式,估算了常温、低温下环氧树脂胶粘剂内聚破坏时的疲劳寿命,其致断裂疲劳循环周次达10^6次。 相似文献
6.
应用蒙特卡罗法对焦炭塔疲劳寿命可靠性的分析 总被引:1,自引:0,他引:1
针焦炭塔的疲劳失效分析,以概率论为基础,结合确定性的疲劳断裂力学估算方法,推导了焦炭塔的疲劳裂纹扩展寿命的计算公式.考虑到主要评定参数初始裂纹尺寸、工况载荷、断裂韧性、机械强度和系数等的不确定性和随机性,应用蒙特卡罗模拟法对这些具有某种特定分布的随机变量进行了随机抽样计算,并利用数值积分法编制了计算机程序.求出在一定可靠度和置信度下的疲劳寿命,并与理论计算方法求得的疲劳寿命进行了比较.分析结果表明,蒙特卡罗模拟法真实地反映了评定参数客观存在的不确定性,克服了确定性评定方法的缺点,具有良好的工程指导意义. 相似文献
7.
孟润生 《高科技纤维与应用》2005,30(5):12-15
预浸料工艺性能的差异及桨叶刚度不足是造成产品寿命下降的主要原因。通过对预浸料工艺性能的调整,并且根据材料的性能特点,对铺层的设计进行更改,研究结果表明,不仅提高了桨叶刚度,而且还有效改进抗疲劳性能,最终使产品使用寿命达到设计要求。 相似文献
8.
9.
《Diamond and Related Materials》2005,14(1):6-10
Chemical vapour deposited (CVD) diamond is finding increased application and it is important to study its strength and fatigue properties. The present paper describes research on a batch of di-electric (optical) grade CVD material. The procedure in the experiments was to use some samples from a batch to obtain an average failure load. Other samples were then stress cycled to a chosen fraction of this average load. If they survived 107 cycles, they were considered to be immune to fatigue at that load, and their strengths were measured using a three-point bend test. Some samples survived at least 95% of their critical fracture stress for 107 cycles without fatiguing. In other experiments, a 4-point (double torsion) rig was used to stress samples with macro-flaws in different environments. The observation that fatigue does not reduce the strength of CVD diamond in normal environments adds to its attractiveness for various applications. 相似文献
10.
Stephen K. Brown 《Polymer International》1982,14(1):1-13
Flexural strength, impact energy and fatigue resistance are reported for a wide range of filled unsaturated polyester resin composites. Behaviour of these properties is compared with fracture energies reported earlier. Little correlation with the latter is found and reasons for this are discussed. 相似文献
11.
传统的注塑机筒疲劳强度设计理论未能解释一些实际中出现的新问题,注塑机筒疲劳强度设计成为一个新的研究课题。评述了几种具有代表性的注塑机筒疲劳强度理论设计准则,分析了其局限性和可用范围。结合实例,提出了符合实际的注塑机筒疲劳强度的设计准则。 相似文献
12.
13.