Thursday, June 3, 2010

Re: [MW:5379] CTOD

Crack Tip Opening Displacement test or CTOD is one of a family of fracture mechanics tests that measures the resistance of a material to growing a crack. Similar tests (i.e., da/DN, K1C, KEE, and J1C) can determine fracture resistance of a material, but CTODis particularly suited to pipeline and drilling equipment. The CTOD test is used to determine the fracture mechanics properties of ductile materials and can be thought of as the simulated opening of a pre-existing fatigue crack prior to fracture. The data that result from this opening can be used for critical defect assessment, in which the critical defect size can be determined.

The CTOD Test Process

Please note that the following is a simplified version of the CTOD test process and does not cover all aspects of the test, such as personalized testing specifications.

A CTOD test can be broken into 4 main steps:

1.      Machining of the test specimen (Sample Machining);

2.      Fatiguing of the specimen within specified limits (Pre-Cracking);

3.      Breaking of the specimen under controlled conditions (Fracture);

4.      Post analysis of the specimen and resultant data to obtain the CTOD value (Data Analysis).

rgds
m.m.reddy

On Thu, Jun 3, 2010 at 6:07 PM, Eng/ Mostafa Kamel Hussein <mkh_200@yahoo.com> wrote:

DEAR ALL,

 

WHAT IS MEANT BY CTOD? AND HOW CAN I USE IT?

 

REGARDS,

 

SaSa


--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.



--
M.M.REDDY
QA/QC INSPECTOR (MECHANICAL)
METHANOL PLANT
DAMIATTA - EGYPT
0020168194532

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

No comments:

Re: [MW:34832] Inquiry about Single Bevel with Back Grinding

Dear Uday, As per your question that one is called with backing only,Simple both side you are welding it is backing with strip or without st...