To explore the compressive performance of nonwater
reaction polymers under overlying load, uniaxial compressive strength test is
conducted. The destruction characteristics and strength of polymer with
different densities are discussed, and stressstrain
curves of the material during compression are obtained. Acoustic emission is
used to further investigate the failure of polymers′ internal characteristics, with curves of cumulative acoustic emission events
characterizing the evolution of polymers′ damage and
the damage location map. The results show the following: (1) The acoustic
emission response of nonwater reaction polymer during compression can be
divided into three stages, i.e., rise, stable, and severe fluctuation periods.
(2) The greater the density, the more evident are the three stages and the
shorter are the cumulative ringing times. (3) The acoustic emission monitoring
damage position and quantity agree well with the actual compression damage of
the specimen, indicating that the acoustic emission technology can more
accurately monitor the nonwater reaction polymer destruction under pressure.
Finally, the damage model proposed based on Weibull random distribution can
better reflect the damage evolution of the nonwater reaction polymer during
compression.
LU Lili
,
MA Huihuan
,
GUO Chengchao
,
LIN Zhenzhen
,
MA Junyi
. Compression Damage Model of Nonwater Reaction Polymer
Based on Acoustic Emission Monitoring Technology[J]. Tunnel Construction, 2022
, 42(4)
: 650
-657
.
DOI: 10.3973/j.issn.2096-4498.2022.04.013
