```python
# Create model targeting result file
model = pydpf.Model(target=result_file)

# Get all node IDs in the model
node_ids = model.model_elements.get_all_node_ids()

# Find minimum amount of surrounding elements to get minimum volume
min_surrounding_elements = model.elements_volume(inputs=pydpf.InputsElementsVolume(node_ids=node_ids))

# Read volume by element
element_volumes = model.elemental_volume(inputs=pydpf.InputsElementalVolume(node_ids=node_ids))

# Find minimum list of elements by node to get volume check
min_elements_by_node = model.elements_volume(inputs=pydpf.InputsElementsVolume(node_ids=node_ids, element_volumes=element_volumes))

# Create workflow to compute equivalent stress averaged on elements
workflow = model.create_workflow()

# Apply dot product seqv.volume
workflow.apply_dot_product(fieldA='seqv', scopingA=min_elements_by_node, meshA='element', valueA='volume')

# Sum up those on the list of elements
workflow.sum_up()

# Divide sum by total volume on these elements
workflow.divide_by_total_volume()

# Plot equivalent elemental stress
workflow.plot(field='eqv_stress')

# Plot volume averaged elemental equivalent stress
workflow.plot(field='volume_avg_eqv_stress')

# Use operator with same algorithm
workflow.use_operator(algorithm='same')
```