“…Material properties are influenced by many factors related to loading, such as internal pressure, type of loading, environment, and temperature [ 2 , 3 , 4 , 5 , 6 , 7 ]. Of these, the pre-load (assembly load for example) is very important.…”
This paper reports the results of static tensile and low-cycle fatigue tests on S420M steel specimens. As-received (unstrained) and pre-strained specimens were used during the tests. Based on the static tensile tests carried out, no effect of pre-strain on the basic strength parameters of the S420M steel was found. Low-cycle fatigue tests showed that the pre-strain of the specimens causes a change in the cyclic properties of the steel and a slight increase in fatigue life compared to that of the as-received specimens. The greatest increase in durability was observed at the lowest strain levels.
“…Material properties are influenced by many factors related to loading, such as internal pressure, type of loading, environment, and temperature [ 2 , 3 , 4 , 5 , 6 , 7 ]. Of these, the pre-load (assembly load for example) is very important.…”
This paper reports the results of static tensile and low-cycle fatigue tests on S420M steel specimens. As-received (unstrained) and pre-strained specimens were used during the tests. Based on the static tensile tests carried out, no effect of pre-strain on the basic strength parameters of the S420M steel was found. Low-cycle fatigue tests showed that the pre-strain of the specimens causes a change in the cyclic properties of the steel and a slight increase in fatigue life compared to that of the as-received specimens. The greatest increase in durability was observed at the lowest strain levels.
“…Then, a linear term was introduced into the exponential rule to describe the stable cyclic softening after the initial rapid cyclic softening under elevated temperature cyclic loading. 38,39 Recently, Skibicki et al 40 incorporated the Tanaka parameter into the isotropic hardening rule of the Chaboche model to consider the increased stress response caused by nonproportional hardening, which greatly reduced the relative errors for two nonalloyed steel grades under nonproportional axial-torsional cyclic loading. Arora et al 41 proposed a modification that includes a function of nonproportionality parameter in the kinematic hardening rule after combining Chaboche model, Tanaka parameter, and Meggiolaro method, and better prediction effect was produced for 90 nonproportional axialtorsional test.…”
Strain rate sensitivity will change the cyclic mechanical response of materials under multiaxial thermomechanical fatigue loading; thus, it will lead to errors in fatigue life prediction if strain rate sensitivity is not considered in constitutive simulation. In order to more accurately express the time/rate dependence
“…Joo and Huh (2017) and Joo and Huh (2018) developed rate-dependent isotropic-kinematic hardening models based on Zang's isotropic-kinematic model (Zang et al, 2011) to accurately describe the hardening behavior of TWIP980 and TRIP980 steels at high strain rates. Skibicki et al (2022) coupled Tanaka and Chaboche hardening models to extend the usage of the Chaboche model under asynchronous loading for E235 and E335 steels. They concluded that the proposed model can be implemented for fatigue applications.…”
This study evaluates the performance of a user-defined combined hardening modeling method for advanced high-strength steels (AHSS) under monotonic and reversal loading conditions. The plastic behavior of TWIP980 and TRIP980 AHSS sheet metals is investigated using a cyclic plasticity modeling approach. The model incorporates an isotropic von Mises yield criterion and a single-term Chaboche nonlinear kinematic hardening rule. Monotonic and reversal loading stress-strain curves are predicted and compared with experimental results. The model accurately captured the Bauschinger effect for both materials, but it needs help to effectively model the permanent softening behavior observed in TWIP980 steel. Overall, the proposed modeling method agrees well with experimental results for monotonic loading and accurately represents the Bauschinger effect and transient behavior during reversal loading. However, better improvements are needed to capture the permanent softening behavior of TWIP980 steel.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.