Data-driven estimation of plastic properties in work-hardening model combining power-law and linear hardening using instrumented indentation test
Data-driven estimation of plastic properties in work-hardening model combining power-law and linear hardening using instrumented indentation test
复制标题
使用仪器化压痕测试结合幂律和线性硬化的加工硬化模型中的塑料性能的数据驱动估计
DOI：
10.1080/27660400.2022.2129508
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Watanabe Ikumu
中科院分区：
文献类型：
--
作者：
Chen Ta-Te;Watanabe Ikumu
仪表化压痕测试是测量等效弹性模数和硬度等力学性能的一种有效方法。最近，基于压痕的方法已经扩展到估计与拉伸或压缩试验相对应的应力-应变曲线。然而，由于包含两个材料常数的简单幂函数硬化模型的函数表达能力的限制，在高加工硬化合金中的估计性能被降低。虽然可以采用修正的本构模型来提高表达能力，但需要额外的实验数据才能充分确定这些材料常数。提出了一种基于幂函数硬化模型和线性硬化模型的应力-塑性应变曲线，在不增加额外实验数据的情况下，确定修正后的加工硬化模型中附加材料常数的方法。因此，可以使用现有的方法来确定材料常数。在这项研究中，建立了一种数据驱动的估计方法，利用载荷-深度曲线的载荷曲率的响应面和压痕的堆积高度。将所提出的方法应用于高加工硬化钢进行了验证。
Instrumented indentation testing is an efficient approach for measuring mechanical properties such as equivalent elastic modulus and hardness. Recently, the indentation-based approach has been extended to estimate the stress–strain curve corresponding to tensile or compression tests. However, estimation performance is decreased in high work-hardening alloys because of the limitation of the functional expressiveness in a simple power-law hardening model containing two material constants. Although a modified constitutive model can be employed to improve the expressiveness, additional experimental data are required to adequately determine these material constants. In this study, a method for determining the additional material constant in a modified work-hardening model combining power-law and linear hardening was proposed without additional experimental data, based on the two stress–plastic strain curves of the power-law and linear hardening models. Consequently, the material constants can be determined using an existing approach. In this study, a data-driven estimation approach using the response surfaces of the loading curvature of a load–depth curve and the pile-up height of an indentation impression is established. The proposed approach was applied to high-work-hardening steel for validation.
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DOI：
10.1080/27660400.2021.1959838
发表时间：
2021
期刊：
Science and Technology of Advanced Materials: Methods
影响因子：
--
作者：
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