Multiaxial Random Fatigue of Magnesium Laserbeam-welded Joints – Experimental Results and Numerical Fatigue Life Evaluation☆

Multiaxial Random Fatigue of Magnesium Laserbeam-welded Joints – Experimental Results and Numerical Fatigue Life Evaluation☆
复制标题

镁激光束焊接接头的多轴随机疲劳 实验结果和数值疲劳寿命评估

DOI:
10.1016/j.proeng.2015.02.009
复制
发表时间:
2015
期刊:
Procedia Engineering
影响因子:
--
通讯作者:
Kaufmann
Kaufmann
中科院分区:
--
文献类型:
--
作者:
Bolchoun;Sonsino;Kaufmann

文献摘要

参考文献

被引文献

相似文献

对镁激光焊接接头(AZ31和AZ61合金)在变幅载荷作用下的疲劳寿命进行了试验研究。试件承受载荷控制的循环载荷。试验采用长度为L_s=5·104周、加载比R=-1的高斯分布振幅序列,分别在纯轴向载荷、纯扭转载荷以及同相和异相联合载荷作用下进行,缺口应力由线弹性有限元模型采用参考半径法得到,RREF=0.05 mm。采用了基于压力的假设:Eesh,Sih,Findley,改良的Gough-Pollard。为了改进非比例载荷下的评估,引入了非比例因子。
Fatigue life of magnesium laserbeam-welds (AZ31 and AZ61 alloys) was assessed experimentally under variable amplitude loadings. The specimens were subjected to load-controlled cyclic loadings. The tests were carried out using a Gauss-distributed amplitude sequence of length Ls= 5•104cycles and loading ratio R=-1 under pure axial, pure torsion as well as in-phase and out-of-phase combined loadings.The notch stresses were obtained from a linear-elastic FE-model using the reference radius approach with rref= 0.05 mm. The stress-based hypotheses were applied: EESH, SIH, Findley, modified Gough-Pollard. A non-proportionality factor is introduced in order to improve assessment under non-proportional loadings.
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
A. Bolchoun;J. Wiebesiek;H. Kaufmann;C. Sonsino
通讯作者: C. Sonsino
Festigkeitshypothesen zum Schwingfestigkeitsverhalten von dünnwandigen Laserstrahlschweißverbindungen aus Aluminium unter mehrachsigen Beanspruchungen mit konstanten und veränderlichen Hauptspannungsrichtungen
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
J. Wiebesiek
通讯作者: J. Wiebesiek