การวิเคราะห์ความเสียหายในเหล็กเส้นเสริมคอนกรีตที่เสียรูปที่อัตราความเครียด ที่แตกต่างโดยใช้กลไกความเสียหายต่อเนื่อง

Werachai Lamo

doi:10.60136/bas.v8.2019.258

Authors

Werachai Lamo Department of Science Service

DOI:

https://doi.org/10.60136/bas.v8.2019.258

Keywords:

Damage evolution, Elastic modulus, Strain rate

Abstract

This research study aimed to examine damage evolution in steel bar for reinforced concrete by continuum damage mechanism from and throughout deforming process at varied strain rates from 0.001 s^-1, 0.005 s^-1, 0.01 s^-1 to 0.02 s^-1. From the research study, the increase of the strain rates in the beginning (0.001 s^-1 to 0.01 s^-1) had a significant effect on the development of the damage, approximately 0.33 and 0.18. In other words, the damage rate greatly increased in the initial stage when the stain rate increased. In the later stage, the rising of the strain rates from 0.01 s^-1 to 0.02 s^-1 had a slighter effect on the development of the damage, approximately 0.17 and 0.11. In other words, the damage rate increased lower when the strain rate rose additionally.

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