Instantaneous and time-dependent effect February 7, 2017 Md Sohanur Rahman Sobuj 0665 Mechanical properties When a load is applied on a specimen constantly for a period of time, the specimen initially extends rapidly giving the instantaneous effect and then less rapidly which yields to time dependent effect. Read more Mastering Waterproof Performance: A Deep Dive into Fabric Waterproof Testers and Hydrostatic Pressure Testers