This unique volume examines 23 peer-reviewed papers thatrepresent the latest worldwide technology in pendulum impacttesting. Written by 50 U.S. and international experts in theirfield, these papers are organized into 4 sections:

• Background of Impact Testing

• Reference Energies, Machine Stability, and Calibration

• Impact Test Procedures

• Fracture Toughness Assessment from Impact Test Data

STP 1380 marks the 100 year anniversary of the invention of thependulum impact test by S. Bent Russell, and the research andstandardization efforts of G. Charpy during the early part of the20th century. As an added bonus, reprints of two landmark paperswritten by Russell and Charpy are included in this volume,describing the development of the test equipment andprocedures.