TY - JOUR
T1 - Remarks on some mechanical small-scale tests applied to properties of materials
AU - Cardu, Marilena
AU - Seccatore, Jacopo
N1 - Publisher Copyright:
© Springer-Verlag Wien 2016.
PY - 2016/6
Y1 - 2016/6
N2 - The paper presents the results of test campaigns on small-scale strength properties (particularly, microhardness) performed on two homogeneous materials: calcite, a very common and widespread mineral that is characterized by its relatively low Mohs hardness and its high reactivity with even weak acids; and glass, an amorphous solid characterized by the absence of the long-range order which defines crystalline materials. After a synthetic description of the principles underlying two of the three classical comminution laws, known as Kick’s law and Rittinger’s law, experimental results are discussed. The results of the tests performed show that both scale effect and size effect contribute to the non-constancy of mechanical properties at small scale for crystalline materials. On the other hand, for amorphous materials, a theoretical law considering size effects gives considerably different results from empirical measurements. Considerations and an extended discussion address these findings.
AB - The paper presents the results of test campaigns on small-scale strength properties (particularly, microhardness) performed on two homogeneous materials: calcite, a very common and widespread mineral that is characterized by its relatively low Mohs hardness and its high reactivity with even weak acids; and glass, an amorphous solid characterized by the absence of the long-range order which defines crystalline materials. After a synthetic description of the principles underlying two of the three classical comminution laws, known as Kick’s law and Rittinger’s law, experimental results are discussed. The results of the tests performed show that both scale effect and size effect contribute to the non-constancy of mechanical properties at small scale for crystalline materials. On the other hand, for amorphous materials, a theoretical law considering size effects gives considerably different results from empirical measurements. Considerations and an extended discussion address these findings.
KW - Micro-hardness
KW - Scale effect
KW - Size effect
KW - Small-scale mechanical properties
UR - http://www.scopus.com/inward/record.url?scp=84952924868&partnerID=8YFLogxK
U2 - 10.1007/s00603-015-0902-z
DO - 10.1007/s00603-015-0902-z
M3 - Article
AN - SCOPUS:84952924868
VL - 49
SP - 2023
EP - 2031
JO - Rock Mechanics and Rock Engineering
JF - Rock Mechanics and Rock Engineering
SN - 0723-2632
IS - 6
ER -