Journal
PROPELLANTS EXPLOSIVES PYROTECHNICS
Volume 48, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/prep.202200348
Keywords
-
Categories
Ask authors/readers for more resources
We present a single-crystal plasticity model for b-HMX, and find that the pressure sensitivity of plasticity has the largest contribution to the response of indentation tests, followed by strain-hardening, while the pressure sensitivity of elastic constants plays a smaller role. Moreover, the orientation of the crystal planes and the rotation of the indenter tip may also affect the results of nanoindentation tests.
Mechanical behavior of cyclotetramethylene tetranitramine (HMX) is complex and insufficiently understood, but it is imperative as it affects the initiation of the decomposition reaction though hot spots formation. We present a single-crystal plasticity model for b-HMX which accounts for pressure dependence of both the elastic constants and the yield surface. We evaluate the relative importance of pressure sensitivity of the elastic constants and plasticity, and of strain hardening, to the quasi-static mechanical behavior of HMX, in general, and to indentation, in particular. Further, we study the effect of the in-plane crystallographic orientations of the substrate with respect to the Berkovich indenter tip on the indentation force-displacement curve. We conclude that pressure sensitivity of plasticity makes the largest contribution to defining the response to indentation, followed by strain-hardening, sensitivity of which depends on hardening modulus, while the pressure sensitivity of elastic constants play a smaller role. Both the indentation plane normal orientation and the in-plane indenter tip rotation may influence properties determined from nanoindentation test (e. g. hardness).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available