  Besides screening-current-induced magnetic fields (SCIF), the shielding
effect in high-Tc coated conductors also has an strong influence on its strain
distribution in a coil winding, especially during high-field operations. To
demonstrate this phenomenon, a special experimental setup was designed. With an
LTS background magnet and a small HTS insert coil, we were able to carry out
direct observations on the hoop strains of a 10-mm wide REBCO sample. Measured
data was compared against numerical solutions solved by electromagnetic models
based on T -A formulation and homogeneous mechanical models, showing good
agreements. An analytical expression was proposed to estimate the maximum
radial Lorentz force considering shielding effect. Using the developed
numerical models, we further studied the potential effects of two of the mostly
investigated methods, which were formerly introduced to reduce SCIF, including
multi-filamentary conductors and current sweep reversal (CSR) approach.
