Research on splitting damage characteristics of concrete after different thermal cycles
Year: 2025
Type: article
Abstract: Effects of thermal cycles on the mechanical properties and damage characteristics of concrete under splitting tests were investigated by using digital image correlation (DIC) and acoustic emission (AE) techniques. The quantitative investigation was conducted on damage changes in concrete after thermal cycles. A damage constitutive model based on AE parameters was established. Results show that an appropriate increase in thermal cycles strengthened the tensile strength and tensile modulus of concrete, but the strength decreased and the deformation increased with continuously increased thermal cycles. As thermal cycles increased, ringing counts became more numerous and intensive, accompanied by a greater concentration of damage inside concrete. Concrete specimens underwent the failure evolution process of tensile failure predominantly → mixed failure → shear failure predominantly by analyzing RA (rise time/amplitude)-AF (average frequency) characteristic parameters and macroscopic fracture characteristics. More thermal cycles accelerated the formation of the non-uniform principal strain field and local strain concentration zone on the concrete surface during the loading process. Besides, a continuum damage model using the AE ringing count as a variable was proposed in this paper, which was able to describe the evolution characteristics of various mechanical parameters of concrete treated with different thermal cycles during the deformation and failure process.
Institution: Anhui University of Science and Technology
Language: English
Topic: Rock Mechanics and Modeling
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,540
OpenAlex ID: W4410595181