In materials science, shear modulus or modulus o reegidity, denoted by G, or whiles S or μ, is defined as the ratio o shear stress tae the shear streen:[1]

Shear modulus
Common seembols
SI unitpascal
Derivations frae
other quantities
G = τ / γ


= shear stress
is the force that acts
is the aurie on that the force acts
= shear streen. In ingineerin , ensewhaur
is the transverse displacement
is the ineetial lenth


  1. IUPAC, Compendium o Chemical Terminology, 2nt ed. (the "Gold Book") (1997). Online corrected version:  (2006–) "shear modulus, G".