Design of Machine and Structural PartsA fully developed and very practical presentation of the subject of form design of machine components is provided in this book, including how to recognize what form or shapes cause what stress patterns and how to apply the information to an overall design. Techniques are presented that guide the design engineer to the correct kind of element to use without the need of calculations; how to choose shapes that produce efficient stress patterns. Also included is a brief review of strength/design procedures; the nature of efficient and inefficient stress patterns are covered, general principles of component design, optimizing strength-to-weight ratios, considerations for buckling and impact and the design of joints. |
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Page 162
... holes to reduce stress concentration . Holes A shaft with a drilled hole is shown in Figure 12-12 . Obviously , a stress concen- tration exists because of the hole . The design engineer would like to know what can be done to reduce the ...
... holes to reduce stress concentration . Holes A shaft with a drilled hole is shown in Figure 12-12 . Obviously , a stress concen- tration exists because of the hole . The design engineer would like to know what can be done to reduce the ...
Page 163
... hole . Square corners permit stress concentration and reduce strength across hole . Rounded ends of hole give more practical shape and greater strength through hole Holes should be cut by end mill mortising , not by drilling and filing ...
... hole . Square corners permit stress concentration and reduce strength across hole . Rounded ends of hole give more practical shape and greater strength through hole Holes should be cut by end mill mortising , not by drilling and filing ...
Page 164
... hole reduce local stresses and increase fatigue resistance of shaft resistance Correct Diameter of shaft enlarged around hole to reduce local stresses and increase fatigue resistance of shaft Correct FIGURE 12-14 . Shaft hole shape ...
... hole reduce local stresses and increase fatigue resistance of shaft resistance Correct Diameter of shaft enlarged around hole to reduce local stresses and increase fatigue resistance of shaft Correct FIGURE 12-14 . Shaft hole shape ...
Contents
INTRODUCTION TO FORM DESIGN | 1 |
EFFICIENT AND INEFFICIENT STRESS PATTERNS | 27 |
DESIGNING FOR RIGIDITY | 36 |
Copyright | |
13 other sections not shown
Common terms and phrases
avoirdupois bending moment bending stress bh³ body bolt cantilever beam compression Considerations of Stress contact stress contact surface cross section cross-sectional area crowned tooth cylinders deflection diameter efficient Engineering Considerations equations example flow of force flux force flow free-body diagram geometry given Hertz Hertz contact stress hole inch inefficient stress patterns inertia joint elements joule Juvinall k₁ k₂ keyway kilogram lbf/in length load distribution material maximum stress McGraw-Hill membrane analogy meter modulus of elasticity moment of inertia neutral axis newton newton/meter² normal stress notch plate portion principle R₁ R₂ ratio relative stiffness rigid rivet round bar shape refinement shear stress shown in Figure shows spline spot contact spring constant spring model sprocket steel Stiffeners Strain strap strength Strength of Materials strength-to-weight stress concentration stress distribution tensile tensile stress tension thread torque transverse transverse-shear tube uniform shear uniform stress