COMSOL Cable Accessory Simulation

I need a COMSOL Multiphysics model that accurately represents the behaviour of our medium-voltage cable accessories—primarily the connector section, though insights that also help with related insulators or junction boxes are welcome. The study must cover three tightly linked objectives:

• Electrical stress-gradient mapping around the insulation interface,
• Steady-state and transient thermal profiles,
• Overall performance under combined electrical and mechanical load.

I will supply the 3-D geometry, material data (conductivity, permittivity, loss factors, thermal coefficients) and operating limits. Your task is to build the physics, mesh, solve, and deliver:
- The native COMSOL file with all study steps,
- High-resolution plots of electric field, temperature and von-Mises stress,
- A concise PDF (