Modelling and Experimental Validation of Material Deformation at Different Zones of Welded Structural-Steel under Multiaxial Loading
Modelling and Experimental Validation of Material Deformation at Different Zones of Welded Structural-Steel under Multiaxial Loading
复制标题
多轴载荷下焊接结构钢不同区域材料变形的建模和实验验证
DOI：
10.1016/j.msea.2021.140826
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发表时间：
2021
期刊：
影响因子：
6.4
通讯作者：
Schulze V.
中科院分区：
文献类型：
--
作者：
Hemmesi K;Holey H;Elmoghazy A;Böhm R;Farajian M;Schulze V.
焊缝的疲劳寿命评估是一个工程挑战，涉及材料不均匀性，焊接残余应力，缺口应力效应和多轴载荷条件。在焊件中，由于非均匀加热过程，焊接金属和相邻区域中的材料可能表现出不均匀的机械性能。这使得疲劳载荷条件下的局部应力-应变评估更加复杂。因此，必须表征焊接缺口附近材料的机械性能，特别是循环性能的变化。为了提高疲劳寿命估计的预测，数值模拟技术的补充实验studies.The目前的工作研究焊缝诱导的铁素体-珠光体钢的多轴循环性能的微观结构变化的影响。建立了描述S355 J2 H结构钢循环塑性变形行为的数值模型。两种材料状态存在于焊缝附近，基体材料和热影响区（HAZ）被认为是。特别注意材料的非比例硬化。这两种材料的实验结果被用来校准的各向同性和运动硬化常数的Chaboche塑性模型。校准模型适用于多轴载荷条件。为了考虑非比例硬化效应，实现了由田中本构激励参数。因此，首先，比例的结果再现，然后将非比例性参数纳入各向同性硬化定律。比例和非比例多轴载荷路径的校准程序的结果进行了讨论，其适用性在疲劳分析和模型的局限性。
The fatigue life assessment of welds represents an engineering challenge regarding material inhomogeneity, welding residual stresses, notch stress effects and multiaxial loading conditions. In a weldment due to the non-uniform heating process the material in the weld metal and adjacent regions may exhibit heterogeneous mechanical properties. This makes the local stress-strain evaluations even more complicated under fatigue loading conditions. Therefore it is essential to characterize the variation of mechanical and particularly cyclic properties of the material in the vicinity of the weld notches. To improve the predictions of fatigue life estimation, numerical modelling techniques are complemented by experimental studies.The present work investigates the effects of weld induced microstructure variations in the multiaxial cyclic properties of the ferritic-pearlitic steels. A numerical model to describe the cyclic plastic deformation behavior of constructional steel S355J2H is established. Two material states present in the vicinity of a weld, the base material and the heat-affected zone (HAZ) are considered. Special attention was given to the non-proportional hardening of the material. Experimental results for both materials are used to calibrate the isotropic and kinematic hardening constants in the Chaboche plasticity model. The calibrated model is applied to multiaxial loading conditions. To account for non-proportional hardening effects, a constitutive motivated parameter by Tanaka is implemented. Therefore, first, the proportional results are reproduced and then the non-proportionality parameter is incorporated into the isotropic hardening law. The results of the calibration procedure for both proportional and non-proportional multiaxial load paths are discussed regarding its applicability in fatigue analysis and limitations of the model.
DOI：
10.1115/1.3225985
发表时间：
1987-10-01
影响因子：
1.2
作者：
BENALLAL, A;MARQUIS, D
通讯作者：
MARQUIS, D
与后续疲劳分析有关的循环塑性模型的选择和校准
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
R. Halama
通讯作者：
R. Halama
通过加卸载和循环加载扭转试验确定剪切应力-应变曲线
DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
Han;Zhiyou Xu;Paul T. Wang
通讯作者：
Paul T. Wang