SHOCK ABSORBING MEMBER, METHOD FOR PRODUCING SHOCK ABSORBING MEMBER, AND METHOD FOR PRODUCING STEEL SHEET FOR COLD PLASTIC WORKING

A shock absorbing member which can increase impact absorption energy and also enables thinning of a steel sheet that is a starting material, a method for producing the shock absorbing member, and a method for producing a steel sheet for cold plastic working are provided. The shock absorbing member includes a ridge portion formed in a curved shape as viewed from a longitudinal direction, and a wall portion extending from the ridge portion. In the wall portion, a ratio σ/τbetween a tensile stress σwhen an elongation in a tensile test is 5% and a shear stress τwhen a shear strain in a shear test is 5√3% is 1.70 or less, or a ratio σ/τbetween a tensile stress σwhen an elongation in a tensile test is 10% and a shear stress τwhen a shear strain in a shear test is 10√3% is 1.70 or less.