Yes.Please use the Google scholar to find papers.Read the papers inside to find the data there.The titles may seem a bit far but there maybe valuable data there.
Without papers the data found online will not be either organized or acceptable.
Dear friend, you should search for published articles and valid documents that include laboratory results. In this regard, you can search on the site of Google Scholar, Elsevier Publications, Springer, etc.
If you could find, I hope the article "ANALYSES OF FATIGUE AND FATIGUE-CRACK GROWTH UNDER CONSTANT- AND VARIABLE-AMPLITUDE LOADING" J.C. Newman, Jr. will help you.