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Dear Mark, Residual stress is a real phenomenon, poorly understood in Earth Science but perhaps better understood by material scientists/engineers. It is the stress approaching equilibrium in the interior of a rock or mineral, when neither normal or shear stresses are being transmitted through its surface. Crystal-plastic deformation or phase transitions are potentially responsible for the development of residual stresses in earth materials. It can be measured directly using synchrotron x-ray radiation. It is possibly amenable to neutron diffraction analysis as well. If you achieve some reasonable results in your research it will be a very interesting result and potentially quite high impact. For a recent study I recommend; Chen et al., GEOLOGY, March 2015; v. 43; no. 3; p. 219–222 Also the excellent text book; Zang & Stephansson, Stress Field of the Earth's Crust, Springer. I'm actively working on this and am open to discussing collaborations in the field. Regards, Steven Micklethwaite Assoc.Prof. School of Earth, Atmosphere and Environment, *Rm 144, 9 Rainforest Walk (Bldg 28)* *Monash University* *Clayton, VIC.* 0428 231002 skype: micklethw.structure On 16 September 2016 at 02:16, Mark Burdett <[log in to unmask]> wrote: > Dear All > > Do rocks retain a residual stress? > > This is a concept I have often heard implied but I had never seen any > research that looked to directly test it. I have one rock mechanics paper > (Bott, 1970) that used stress gauges in a basalt to suggest the presence of > a residual stress (due to volume change during crystallisation I assume but > not stated), but am having difficulty in finding more on the topic of > residual stress. > > Therefore, I am seeking research papers, experiments, and options from a > geological and rock mechanics perspective on the concept of residual stress > in rocks due to factors such as lithofication/burial, brittle and ductile > deformation, volume change during solidification of magma, and/or > mechanical loading (intact rock testing etc.). > > References and/or reprint PDF of hard to find texts would be greatly > appreciated and best sent off list to: [log in to unmask] > > Many thanks, > > Mark > > Monash University > > Melbourne >