Abstract
The shear modulus and shear strength of extruded polystyrene foam were obtained by the in-plane shear and asymmetric four-point bending tests. In addition, the test data were numerically analysed, and the effectiveness of these tests was examined. The numerical and experimental results suggest that the shear modulus and shear strength obtained from the in-plane shear test are significantly smaller than those obtained from the asymmetric four-point bending test because the influence of the stress concentration was less significant. Although the in-plane shear test is standardised in ASTM C273/C273M-11, it is considerable to adopt the asymmetric four-point bending test as another candidate for obtaining the shear properties of extruded polystyrene foam.
Highlights
At present, extruded polystyrene foam (XPS) is used in the construction of sandwich panels [1,2,3,4], flooring materials, such as tatami mats, used in traditional rooms in Japan [5,6,7,8], and heat-storage tanks [9] and geofoams [10,11,12], because the lightweight nature of XPS is effective to attenuate the seismic forces
Test, the in-plane shear (IPS) test is standardised in ASTM C273/C273M-11 [19]
In the IPS test simulation, the stress components corresponding to each node σx, σy, and τxy were
Summary
At present, extruded polystyrene foam (XPS) is used in the construction of sandwich panels [1,2,3,4], flooring materials, such as tatami mats, used in traditional rooms in Japan [5,6,7,8], and heat-storage tanks [9] and geofoams [10,11,12], because the lightweight nature of XPS is effective to attenuate the seismic forces. There is concern that the stress concentration between the metallic plate and foam sample seriously influences the shear modulus and shear strength values in the IPS test, the IPS test is standardised in ASTM C273/C273M-11 [19]. Considering these drawbacks, Polymers 2020, 12, 47; doi:10.3390/polym12010047 www.mdpi.com/journal/polymers
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