Чем крепкое отличается от прочного? Механические свойства материалов

Strong is when it doesn't break, rigid is when it doesn't bend, and hard is when it can't be scratched—that's the short version. A more detailed discussion took us a little less than an academic hour. 00:00 Introduction 01:25 Material Strength—Sample Strength 02:55 Bending, Tension, Compression 04:02 Absolute and Relative Strength 05:48 Stress State 08:35 Principal Coordinate System and Stress State Diagrams 10:03 Stress Diagram 12:00 Deformations 13:47 Elastic Region 15:51 Transition to Plastic Deformations 18:08 Uniform Deformation Region, Ultimate Strength, and Neck 21:47 So What Is Strength? 24:05 Bending Tests 26:48 Viscosity 30:33 Compression 33:22 Review and Reinforcement 37:33 Summary