Joseph Margolis

Michael Krausz

Martinus Nijhoff Publishers

A.S. Krausz

James M. Margolis

R. Burian

Professor Joseph Margolis

The Greater Philadelphia Philosophy Consortium was launched in the early eighties. It began during a particularly lean period in the American economy. But its success is linked as much to the need to be in touch with the rapidly changing currents of the philosophical climate as with the need to insure an adequately stocked professional community in the Philadelphia area faced, perhaps permanently, with the threat of increasing attrition. The member schools of the Consortium now include Bryn Mawr College, the University of Pennsylvania, Temple University, and Villanova University, that is, the schools of the area that offer advanced degrees in philosophy. The philosophy faculties of these schools form the core of the Consortium, which offers graduate students the instructional and library facilities of each member school. The Consortium is also supported by the associated faculties of other regional schools that do not offer advanced degrees - notably, those at Drexel University, Haverford College, La Salle University, and Swarthmore College - both philosophers and members of other departments as well as interested and professionally qualified persons from the entire region. The affiliated and core professionals now number several hundreds, and the Consortium's various ventures have been received most enthusiastically by the academic community. At this moment, the Consortium is planning its fifth year of what it calls the Conferences on the Philosophy of the Human Studies.

Rationality, Relativism and the Human Sciences

The understanding of time dependent crack propagation processes occupies a central place in the study of fracture. It also encompasses a wide range of conditions: failure under sustained loading in a corrosive environment, fracture under cyclic loading in non-degrading and in corrosive environment, and rupture at high temperature. This list covers probably 90% of the failures that occur in engineering practice. The process of time dependent fracture is controlled by the physics of atomic interaction changes; it is strongly influenced by the micro structure; and affected by the interaction of the material with the mechanical (load, displacement), the thermal (temperature), and the chemical or radiation environment. To be able to control crack propagation the development of testing methods and the understanding of the industrial environment is essential. The conference was organized in this context. A call was issued for contributions to the following topics. THERMAL ACTIVATION. Theoretical papers dealing with the modification of fracture mechanics to accommodate thermally activated processes. TIME DEPENDENT MICRO-PROCESSES. Presentations covering both the theoretical and observational aspects of creep and fatigue damage in materials whose microstructures may exert a significant influence on crack growth. INDUSTRIAL APPLICATIONS. Submissions describing the practical application of fracture mechanics and damage tolerance analysis to the determination of useful operating lives. x ENVIRONMENTAL EFFECTS. Papers dealing with engineering materials and/or components exposed to aggressive environments, with and without temperature effects. The response was gratifying. Leading experts responded; the organizers of the conference are grateful for the large number of excellent contributions.

Proceedings of the Eleventh Canadian Fracture Conference, Ottawa, Canada, June 1984

Time-Dependent Fracture

A.S. Krausz

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