Don't Design with Your Heart

摘要

11 too often, engineers assume i something must be true Iwithout analyzing the underlying principles involved. Deep down in their hearts, they intuitively "know" something to be true and, when this is the case, they are unlikely to question the assumption. After all, it is "obvious" and "true." That is what I call "designing with your heart." As a way of thinking about this kind of situation, let's consider a hypothetical example: the cantilevered tubular assembly shown in Figure 1. To keep things simple, we will state that the only forces involved were those that result from the weight of the tube.