Dynamic behaviour and visco-elastic damage model of ultra-high performance cementitious composite
By Jianzhong Lai, Wei Sun. 2009
173 citations recorded by the source corpus.
Abstract The dynamic behaviour of ultra-high performance cementitious composite (UHPCC) with compressive strength of 200 MPa with different steel fiber volume fractions was studied under impact using the split Hopkinson pressure bar. Three aspects of the testing: a gimbal device, wave shaping and direct strain measurement, were used to increase experimental accuracy. Results indicate that UHPCC has obvious strain rate effects. The peak stress, peak strain, elastic modulus and the area under the stress–strain curve increase with increasing strain rate. When the strain rate exceeds a threshold value, specimens with and without fibers begin to fracture. At high strain rate the unreinforced specimens fracture into small parts while fiber reinforced ones only have fine cracks on the edges. A visco-elastic damage model of UHPCC is proposed based on a nonlinear visco-elastic model (the ZWT model) and the material damage measured by the ultrasonic wave velocity method.
Subfields: Civil and Structural Engineering, Materials Chemistry, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/712e174ad0fc4ae02282b0dc35124d73519489f6
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In Civil and Structural Engineering
In Materials Chemistry
In Mechanics of Materials
Citations in the corpus
- Research progress on the dynamic compressive properties of ultra-high performance concrete under high strain rates (2021, methodology): “Jiao et al. [55], Lai et al. [43] and Hou et al. [63] found that the value of elastic modulus obviously increased with the increase of strain rate and the volume fraction of the steel fibers had no effect on elastic modulus.”