SE 130 Forces In A Howe Truss Didactic Equipment Vocational Training Equipment Mechanical Training Equipment
Investigation of bar forces under different load cases Features - measurement of bar forces on a single plane truss, Howe type - measurement of bar forces by strain gauge measurement - external load may be applied at different angles Learning objectives/experiments - measurement of the bar forces in a single plane truss, Howe type - dependency of bar forces on theexternal force -- magnitude, direction, point ofapplication - comparison of measuring results with mathematical and graphicalmethods -- method of joints -- Ritter’s method of sections -- Cremona diagram - basic principle: measurement of forces using strain gauge measurement Specification [1] investigation of bar forces in a single plane, statically determinate truss [2] ready assembled Howe truss [3] frame for horizontal experimental setup [4] influence of dead weight minimized by horizontal experimental setup [5] any straight and inclined load cases possible [6] fine adjustment of load force [7] low-friction knife-edge bearing [8] 2 supports for vertical forces, 1 support for horizontal forces [9] pre-balanced strain gauge connection box with connection to measuring amplifier FL 152 [10] measuring amplifier FL 152 required [11] -software in FL 152 to evaluate measured values graphically Technical data Truss: Howe type - bar cross-section: 10x3mm, stainless steel - bar lengths: 115,5, 200, 231mm - external loading: max. 500N - bars: 13, of which 7 with measuring points Load application device with force gauge - tensile force: max. 600N - stroke: 30mm Node disks: 8 Angle between bars: 30°, 45° LxWxH: 1220x620x250mm (frame) LxWxH: 850x265x15mm (Howe truss) Weight: approx. 43kg
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