4.1 The axial force fatigue test is used to determine the effect of variations in material, geometry, surface condition, stress, and so forth, on the fatigue resistance of metallic materials subjected to direct stress for relatively large numbers of cycles. The results may also be used as a guide for the selection of metallic materials for service under conditions of repeated direct stress.

4.2 In order to verify that such basic fatigue data generated using this practice is comparable, reproducible, and correlated among laboratories, it may be advantageous to conduct a round-robin-type test program from a statistician's point of view. To do so would require the control or balance of what are often deemed nuisance variables; for example, hardness, cleanliness, grain size, composition, directionality, surface residual stress, surface finish, and so forth. Thus, when embarking on a program of this nature it is essential to define and maintain consistency a priori, as many variables as reasonably possible, with as much economy as prudent. All material variables, testing information, and procedures used should be reported so that correlation and reproducibility of results may be attempted in a fashion that is considered reasonably good current test practice.

4.3 The results of the axial force fatigue test are suitable for application to design only when the specimen test conditions realistically simulate service conditions or some methodology of accounting for service conditions is available and clearly defined.

A World Undone: The Story Of The Great War, 191... -

"The war was a long-delayed explosion of a world that had become too complex for its own political systems."

It highlights the tragic incompetence of many generals and the incredible endurance of the common soldier. Killer Quote A World Undone: The Story of the Great War, 191...

Meyer manages to balance the bird’s-eye view of grand strategy with the gritty, heartbreaking reality of the trenches. It doesn't just cover the battles; it explains why the world fell apart in 1914 and how it was never the same again. "The war was a long-delayed explosion of a

Between chapters, Meyer includes short essays on things like the Romanovs, the U-boat menace, and the evolution of the machine gun. Between chapters, Meyer includes short essays on things

It covers all fronts—not just the Western Front—giving a much-needed look at the Eastern and Middle Eastern theaters.

It’s a 700+ page commitment, but it reads like a thriller. If you want to understand the 20th century, you have to understand the Great War, and there is no better starting point than this. Have you read any other WWI histories, or