I've found only a few works concerning mechanical properties of chert and in some of these the data source are not well expressed. In particular, I am looking for the Young's modulus of chert both static and dynamic. Thank you in advance.
[warning - I'm not an expert on chert! But I do know a fair bit about mechanical behavour of materials.] As far as I can see, "chert" means microcrystalline quartz, with varying degrees of impurity content and crystallline texture. You might therefore expect Young's modulus to lie between about 72 GPa (fused quartz - i.e. pure silica glass) , and up to about 97GPa (single crystal quartz, down the c-axis, which is the stiffest direction) , For a particular sample, it will depend on microstructure and orientation of measurement w.r.t. any texture. Unless the chert in question has a high inorganic content I wouldn't expect dynamic and static properties to differ significantly. If in doubt - measure it for your particular material!
I suppose that you'd better try the contactless method of digital image correlation to test the Young's modulous and Poisson's rate
one could also measure it fairly easily by ASTM C1259 method, though it requires a relatively large sample. The Materials Testing & Research Center at The Edward Orton Jr. Ceramic Foundation at http://ortonceramic.com/ can do such a Test in the U.S.A.
Dear all,
I am very sorry for not answering back earlier and I really want to thank you for your help.
It has been quite difficult to find paper concerning Young's modulus of chert After a first revision of our paper, we decided to test chert and to compare our results with literature data. As suggested by Steve, we also analyse materials similar to chert (glass, fused quartz, fused silica and so on). We measured the chert static Young's moduli using the BRAVA rock deformation apparatus (Collettini et al., 2014). Our results show a significantly lower YM value compared to previous measurements on similar rocks and materials. We suggest that this difference could due to flaws and micro-fractures within sample (our samples came from the strongly deformed area of the northern Apennines -Italy). In literature YM of chert (or similar rocks) and of similar materials range between 48 and 100 GPa. Please have a look to the data of Table S1 in our paper in press in Tectonophysics.
Thank you very much again.
Article Pressure solution inhibition in a limestone–chert composite ...
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