This document specifies a method for the evaluation of the buckling load which:<\/p>\n
takes into account a geometric model of the hydraulic cylinder, meaning it does not treat the hydraulic cylinder as an equivalent column,<\/p>\n<\/li>\n
can be used for all types of cylinder mounting and rod end connection specified in Table 2<\/span>,<\/p>\n<\/li>\n includes a factor of safety, k<\/i>, to be set by the person performing the calculations and reported with the results of the calculations,<\/p>\n<\/li>\n takes into account possible off-axis loading,<\/p>\n<\/li>\n takes into account the weight of the hydraulic cylinder, meaning it does not neglect all transverse loads applied on the hydraulic cylinder,<\/p>\n<\/li>\n can be implemented as a simple computer program, and<\/p>\n<\/li>\n considers the cylinder fully extended.<\/p>\n<\/li>\n<\/ol>\n The method specified is based on the elastic buckling theory and is applicable to single and double acting cylinders that conform to ISO 6020 (all parts)<\/span><\/span> , ISO 6022<\/span><\/span> and ISO 10762<\/span><\/span> . If necessary, finite element analyses can be used to verify as well as to determine the buckling load.<\/p>\n The method is not developed for thin-walled cylinders, double-rods or plunger cylinders.<\/p>\n The method is not developed for internal (rod) buckling.<\/p>\n The friction of spherical bearings is not taken into account.<\/p>\n This method is based mainly on original work by Fred Hoblit [<\/sup> 2<\/sup><\/span> ]<\/sup>. This method has been established in reference to the standard NFPA\/T3.6.37 [<\/sup> 1<\/sup><\/span> ]<\/sup>.<\/p>\n<\/div>\n Hydraulic fluid power. Method for evaluating the buckling load of a hydraulic cylinder<\/b><\/p>\nPDF Catalog<\/h4>\n
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\n PDF Pages<\/th>\n PDF Title<\/th>\n<\/tr>\n \n 2<\/td>\n National foreword <\/td>\n<\/tr>\n \n 6<\/td>\n Foreword <\/td>\n<\/tr>\n \n 7<\/td>\n Introduction <\/td>\n<\/tr>\n \n 9<\/td>\n 1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n\n 10<\/td>\n 4 Symbols and units
4.1 General <\/td>\n<\/tr>\n\n 11<\/td>\n 4.2 Additional notations
5 General principles
5.1 Purpose
5.2 Description <\/td>\n<\/tr>\n\n 12<\/td>\n 5.3 Dimensional layout of hydraulic cylinder <\/td>\n<\/tr>\n \n 13<\/td>\n 5.4 Common calculation of maximum stress in the rod (for all mounting types) \u03c3 max
5.4.1 General <\/td>\n<\/tr>\n\n 14<\/td>\n 5.4.2 Deflexion curve
5.4.3 Bending moment
5.4.4 Maximum value of the bending moment
5.4.5 Maximum stress of the piston rod <\/td>\n<\/tr>\n\n 15<\/td>\n 5.4.6 Mounting types of the cylinder tube and piston rod <\/td>\n<\/tr>\n \n 16<\/td>\n 6 Case of pin-mounted hydraulic cylinders
6.1 Model of the hydraulic cylinder and unknown values
6.2 Linear system <\/td>\n<\/tr>\n\n 17<\/td>\n 6.3 Critical buckling load
6.4 Greatest allowable compressive load <\/td>\n<\/tr>\n\n 18<\/td>\n 7 Case of hydraulic cylinders fixed at the beginning of the cylinder tube and pin mounted at the end of the piston rod
7.1 Critical buckling load
7.2 Linear system <\/td>\n<\/tr>\n\n 19<\/td>\n 8 Case of hydraulic cylinders pin mounted at the beginning of the cylinder tube and fixed at the end of the piston rod
8.1 Critical buckling load
8.2 Linear system <\/td>\n<\/tr>\n\n 20<\/td>\n 9 Case of hydraulic cylinders fixed at both ends
9.1 Critical buckling load <\/td>\n<\/tr>\n\n 21<\/td>\n 9.2 Linear system <\/td>\n<\/tr>\n \n 22<\/td>\n 10 Case of hydraulic cylinders fixed at the beginning of the cylinder tube and free at the end of the piston rod
10.1 Critical buckling load <\/td>\n<\/tr>\n\n 23<\/td>\n 10.2 Linear system <\/td>\n<\/tr>\n \n 24<\/td>\n 11 Case of hydraulic cylinders fixed at both ends with free movement allowed at the end of the piston rod
11.1 Critical buckling load <\/td>\n<\/tr>\n\n 25<\/td>\n 11.2 Linear system <\/td>\n<\/tr>\n \n 26<\/td>\n Annex A (informative) Example of numerical results <\/td>\n<\/tr>\n \n 28<\/td>\n Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" \n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n BSI<\/b><\/a><\/td>\n 2021<\/td>\n 30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":381595,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[369,2641],"product_tag":[],"class_list":{"0":"post-381586","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-23-100-20","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/381586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/381595"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=381586"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=381586"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=381586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}