The element is added displacement load in one direction, at the steptime=0, the nodal displacement is zero, and so as the integrated points' strain and stress. However, the internal force NFORC is nonzero. When we calculate internal force by ourselves, it is obtained by the integral for BT*stress. But the stress is zero, how Abaqus calculates the nonzero initial internal force?
The details can be found in the attachment.
Hello,
I am having issues running an Eigen value simulation on a bridge model that I have developed. The model consists of a bridge super-structure supported by pinned connections on the ends of the bridge length and a roller support in the middle.
The model runs without errors when I do not request an Eigen value analysis, but aborts when I request an Eigen analysis. The message file sites the cause as a factorization error. Warnings also appear stating a zero pivot when releasing the 1st dof of the nodes associated with the roller connection.
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-- Biswajit
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Well I tried to search for a related thread and could not find one, so creating a new
one. But if such a thread exists, please direct me there, thank you. I
am trying to define the contact between two gears and it worked
perfectly before without Substrcture. But I receive a warning when I use
usbstructures. I do not want go into much details because I do not want
to confuse anyone. I wish to have answer only for following question:
The 20th International Conference on Wear of Materials will focus on both the fundamental and applied aspects of wear and friction of materials at the macro-, micro-, and nano-scale. It will address the understanding of tribological phenomena; particularly the progress in recent decades and a special session will concentrate on modeling of wear.
A detailed report of our work on trying to find cohesive laws for interfacial fracture is attached. I will add the experimental data after a shorter version of this report has been published.
The reason for posting this report on iMechanica is so that people who want to replicate the tests or perform similar tests know what is involved. As we have found out, many details and potential problems faced by an experimentalist are hard to determine from the concise papers that are typically published as journal articles.
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Hi everybody,
I'm writing a User Difined Element (UEL) for my research.
Would you please let me know if it's possible to call a file (txt, dat, etc) inside of the UEL or not?
Example:
IF (LFLAGS(3)=1) THEN
OPEN (UNIT = 10, FILE = "AAA.dat", STATUS = "OLD")
READ (10, *), StiffnessTable
AMATRX=StiffnessTable
END IF
Thanks in advance,
