Experimental on SHPB Dynamic Properties of Red Clay with Different Water Content
In order to investigate the dynamic mechanical properties of red clay under dynamic loading,the split Hopkinson pres-sure bar(SHPB)dynamic test system was utilized to conduct tests at water content levels of 5％,7％,9％,11％,13％,and 15％,and impact velocities of 6 m/s,8 m/s,and 10 m/s.A total of 18 sets of red clay samples with varying water content and impact veloc-ity were examined to assess the dynamic characteristics of red clay under different water content and strain rate conditions.The findings indicate that the clay exhibits a noticeable strain rate dependency as the impact velocity increases.When subjected to impact loading,the dynamic stress-strain curve of lattice-clay displays two distinct curves corresponding to different loading strain rates,specifically brittle-plastic failure and brittle failure.As the strain rate rises,the failure mechanism of lattice-clay shifts gradually from plastic-brittle failure to brittle failure.Under the influence of impact velocity alone,the compressive strength and dynamic elastic modulus of terracot-ta increase with higher strain rates,while they initially decrease and then increase with rising water content.
red claydynamic mechanical propertiesimpact loadSHPB(split Hopkinson pressure bar)
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