IRC Instituto Roy Carlson

Legacy · Mechanical validation · §8.3.4 Case 1

Torsion — held twist

Cylinder under imposed and held φ/L\varphi/L — Case 1 of Section 8.3.4. Torque relaxation with aging (Itumbiara).

Article: Part I · DOI 10.70271/rirc.v1n2a007

Material: Itumbiara

Reference figure

Torsion — held twist

Data sheet

Item Value
Outer radius R=0.5mR=0.5\,\mathrm{m}
Cuts r=Rr=R and r=0.25mr=0.25\,\mathrm{m}
Loading φ/L=2×10−4m−1\varphi/L=2\times10^{-4}\,\mathrm{m}^{-1} constant from z0=3dz_0=3\,\mathrm{d}
Material Itumbiara; ν=0.20\nu=0.20
Reference τ(r,t)=r(φ/L)R(t,z0)/[2(1+ν)]\tau(r,t)=r(\varphi/L)\,R(t,z_0)/[2(1+\nu)]

Input files

Output files

File Content
ref_torcao_giro_cortes.csv τ\tau at r=Rr=R and r=0.25mr=0.25\,\mathrm{m} (ref. × incremental)
ref_torcao_giro_campo.csv Field τ(r,t)\tau(r,t)
ref_torcao_giro_pontos_controle.csv Relative error on the cuts

Code: torsion_cylinder, torsion_field (package).