curing-steps

# Curing Steps Analysis ## Description Configure 4-step curing analysis (vis, rub, glassy, sp) in Abaqus. Invoke when user needs curing step sequence, static step settings, or step-by-step curing process setup. ## Content The composite curing simulation uses 4 steps in sequence, all defined as `*Static` steps with `nlgeom=NO`. ### Step Sequence #### Step 1: vis (viscous state) - **Increment control:** 0.1, 1., 1e-05, 0.5 - **Temperature:** 150°C - **Pressure:** 0.6 MPa - **Friction:** 0.45 - **Tool BC:** U1=0, U2=0 #### Step 2: rub (rubbery state) - **Increment control:** 0.1, 1., 1e-05, 0.3 - **Temperature:** 180°C - **Pressure:** 0.6 MPa - **Friction:** 0.2 (taumax=0.55) - **Tool BC:** continues from vis step #### Step 3: glassy (glassy state) - **Increment control:** 0.1, 1., 1e-05, 0.5 - **Temperature:** 25°C - **Pressure:** No pressure - **Friction:** 0.169 - **Tool BC:** continues from rub step #### Step 4: sp (springback) - **Increment control:** 0.1, 1., 1e-05, 0.5 - **Temperature:** 25°C - **Pressure:** No pressure - **BC:** Set-2 U1=U2=U3=0 - **Model Change:** removes contact + tool ### Static Step Format The `*Static` step uses the following format with initial increment, total time, min increment, and max increment: ``` *Static initial_increment, total_time, min_increment, max_increment ``` Example for vis step: ``` *Static 0.1, 1., 1e-05, 0.5 ``` ### Output Requests Per Step Each step includes the following output requests: ``` *Output, field *Node Output CF, NT, RF, U *Element Output, directions=YES LE, PE, PEEQ, PEMAG, S, SDV, TEMP *Contact Output CDISP, CSTRESS *Output, history, variable=PRESELECT ``` ### Restart Configuration No restart output is written: ``` *Restart, write, frequency=0 ``` ### Step Transitions Loads and boundary conditions carry forward from one step to the next unless explicitly replaced with `op=NEW`. This means: - Tool BCs applied in the vis step remain active through the glassy step - Pressure applied in vis/rub steps is carried forward unless removed - To replace all previous loads/BCs, use `op=NEW` on the load or BC keyword