Learning Forum

[fan134]

Hello,

I am conducting a geomechanical analysis of an oil/gas wellbore. The hole at the center represents the wellbore, and there is a semi-elliptical fracture in the cement (Fig-2). The effective minimum horizontal stress is 3.23 MPa, acting in the X-direction, while the effective maximum horizontal stress is 5.25 MPa, acting in the Y-direction (Fig-1). The model runs without any issues when the fracture is not present. However, when the fracture is included, it produces a fatal error, as shown below. Even after refining the mesh to a coarser level, the error persists. For your info, the RAM on my PC is 16 GB.

I would really appreciate it if anybody could help me resolve this issue.

Regards,

Faysal

ERROR: Worker process(es) with rank(s) 2, 2 have encountered a FATAL error. The information below was gathered from the file*.out output file(s). Please review the worker process output file(s) listed below for more details on this error.
 Worker Process Output File .\file2.out:
 A FATAL, DUPLICATE ERROR WILL FOLLOW THIS MESSAGE
 Worker Process Output File .\file2.out:
 
 *** FATAL ***                           CP =       3.406   TIME= 19:17:17
 The low level memory manager failed to return a valid memory handle for a free operation.  Pointer value: 21.  It is likely that the code is calling for a free with a pointer that was not allocated via the memory manager.

 

 

Fig-1:

 

 

Fig-2:

 

[Erik Kostson]

 

 

 

Not sure about the error (likely as you saw due to the fracture object) .
More important here, one should not be using any fracture objects on cement (they are not for concrete cracking, and would not be very good to use there I would imagine).

for cement/concrete cracking see the microplane model also used in an example in the help manual (search there for : Chapter 54: Reinforced Concrete Joint Analysis)

All the best

Erik