The mechanical behaviour and failure modes of volcanic rocks: a review

MJ Heap, MES Violay - Bulletin of Volcanology, 2021 - Springer
The microstructure and mineralogy of volcanic rocks is varied and complex, and their
mechanical behaviour is similarly varied and complex. This review summarises recent …

Strain localization in magmas

Y Lavallée, JE Kendrick - Reviews in Mineralogy and …, 2022 - pubs.geoscienceworld.org
One of the most intriguing and (from the point of view of modeling) poorly understood
aspects of geomaterial mechanics is strain localization. Strain localization is a common …

Quantifying the physical and mechanical heterogeneity of porous volcanic rocks from the Chaîne des Puys (Massif Central, France)

E Vairé, MJ Heap, P Baud, B van Wyk de Vries - Bulletin of Volcanology, 2024 - Springer
Volcanic structures are inhomogeneous on a number of scales. Quantifying whether such
inhomogeneities result in a physical and mechanical anisotropy is important to improve …

The tensile strength of volcanic rocks: Experiments and models

MJ Heap, FB Wadsworth, Z Heng, T Xu… - Journal of Volcanology …, 2021 - Elsevier
The tensile strength of volcanic rock exerts control over several key volcanic processes,
including fragmentation and magma chamber rupture. Despite its importance, there is a …

The tensile strength of hydrothermally altered volcanic rocks

MJ Heap, CE Harnett, FB Wadsworth, HA Gilg… - Journal of Volcanology …, 2022 - Elsevier
The tensile strength of volcanic rocks is an important parameter for understanding and
modelling a wide range of volcanic processes, and in the development of strategies …

The influence of heterogeneity on the strength of volcanic rocks and the stability of lava domes

MJ Heap, CE Harnett, T Nazarbayov, Z Heng… - Bulletin of …, 2023 - Springer
The collapse of lava domes, inherently heterogeneous structures, represents a significant
volcanic hazard. Numerical and analogue models designed to model dome instability and …

Calculating the cohesion and internal friction angle of volcanic rocks and rock masses

MC Villeneuve, MJ Heap - Volcanica, 2021 - jvolcanica.org
Rock failure criteria are key input parameters for models designed to better understand the
stability of volcanic rock masses. Cohesion and friction angle are the two defining material …

Dynamic response mechanism and precursor characteristics of gneiss rockburst under different initial burial depths

D Liu, J Sun, W Meng, M He, C Zhang, R Li… - Journal of Mountain …, 2024 - Springer
To investigate the influence mechanism of geostress on rockburst characteristics, three
groups of gneiss rockburst experiments were conducted under different initial geostress …

Damage amplification during repetitive seismic waves in mechanically loaded rocks

A Lamur, JE Kendrick, LN Schaefer, Y Lavallée… - Scientific reports, 2023 - nature.com
Cycles of stress build-up and release are inherent to tectonically active planets. Such stress
oscillations impart strain and damage, prompting mechanically loaded rocks and materials …

Lateral edifice collapse and volcanic debris avalanches: A post-1980 Mount St. Helens perspective

L Siebert, ME Reid - Bulletin of Volcanology, 2023 - Springer
Abstract The 1980 eruption of Mount St. Helens was instrumental in advancing
understanding of how volcanoes work. Lateral edifice collapses and the generation of …